.
https://hdl.handle.net/21.15107/rcub_grafar_1984

.
https://hdl.handle.net/21.15107/rcub_grafar_1984 .

,
https://hdl.handle.net/21.15107/rcub_grafar_1984 .

TY  - GEN
AU  - Đorđević, Dejana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3506
AB  - The double-averaging methodology (DAM) arose to respond to a need to provide 
a mathematically rigorous tool for describing spatially heterogeneous turbulent 
flows. Initial developments originate from micrometeorologists who revealed 
notable discrepancies between measured and simulated temperature and 
moisture fields above trees when using only Reynolds-averaged Navier-Stokes 
(RANS) equations with various turbulence model closures. The discrepancies were 
attributed to the spatial inhomogeneity of the flow field caused by vegetation. 
Thus, additional spatial averaging of RANS equations over horizontal planes 
sufficiently large to provide statistical averaging of all differences caused by an 
arbitrary distribution of plants and the influence of the biggest vortices responsible 
for the transfer of momentum was suggested. The advantages of using the DAM 
in open-channel hydraulics of gravel-bed rivers were recognised in the early 2000s 
when DAM was first applied and consequently improved. Open-channel vegetated 
flows are another example of spatially heterogene¬ous turbulent flows to which 
the DAM can be applied. The paper presents the results of the DoubleVeg project 
led by the author, in which a new set of equations was derived. After introducing 
the basic DAM concepts, the procedure of deriving Depth-Integrated Double
Averaged Navier-Stokes equations is presented. Consequently, the main 
challenges in solving these equations are discussed, and the results of initial testing 
of systems of homogeneous and non-homogeneous equations are shown.
PB  - University of Novi Sad,  Faculty of Civil Engineering Subotica  Kozaračka 2а, 24000 Subotica, Serbia  URL: conference.gf.uns.ac.rs
T2  - Conference Proceedings of the IX International Conference on Contemporary Achievments in Civil Engineering
T1  - On the application of the double-averaging methodology in modelling vegetated open-channel flows
EP  - 63
SP  - 29
DO  - 10.14415/CACE2024.03
ER  - 

@misc{
author = "Đorđević, Dejana",
year = "2024",
abstract = "The double-averaging methodology (DAM) arose to respond to a need to provide 
a mathematically rigorous tool for describing spatially heterogeneous turbulent 
flows. Initial developments originate from micrometeorologists who revealed 
notable discrepancies between measured and simulated temperature and 
moisture fields above trees when using only Reynolds-averaged Navier-Stokes 
(RANS) equations with various turbulence model closures. The discrepancies were 
attributed to the spatial inhomogeneity of the flow field caused by vegetation. 
Thus, additional spatial averaging of RANS equations over horizontal planes 
sufficiently large to provide statistical averaging of all differences caused by an 
arbitrary distribution of plants and the influence of the biggest vortices responsible 
for the transfer of momentum was suggested. The advantages of using the DAM 
in open-channel hydraulics of gravel-bed rivers were recognised in the early 2000s 
when DAM was first applied and consequently improved. Open-channel vegetated 
flows are another example of spatially heterogene¬ous turbulent flows to which 
the DAM can be applied. The paper presents the results of the DoubleVeg project 
led by the author, in which a new set of equations was derived. After introducing 
the basic DAM concepts, the procedure of deriving Depth-Integrated Double
Averaged Navier-Stokes equations is presented. Consequently, the main 
challenges in solving these equations are discussed, and the results of initial testing 
of systems of homogeneous and non-homogeneous equations are shown.",
publisher = "University of Novi Sad,  Faculty of Civil Engineering Subotica  Kozaračka 2а, 24000 Subotica, Serbia  URL: conference.gf.uns.ac.rs",
journal = "Conference Proceedings of the IX International Conference on Contemporary Achievments in Civil Engineering",
title = "On the application of the double-averaging methodology in modelling vegetated open-channel flows",
pages = "63-29",
doi = "10.14415/CACE2024.03"
}

Đorđević, D.. (2024). On the application of the double-averaging methodology in modelling vegetated open-channel flows. in Conference Proceedings of the IX International Conference on Contemporary Achievments in Civil Engineering
University of Novi Sad,  Faculty of Civil Engineering Subotica  Kozaračka 2а, 24000 Subotica, Serbia  URL: conference.gf.uns.ac.rs., 29-63.
https://doi.org/10.14415/CACE2024.03

Đorđević D. On the application of the double-averaging methodology in modelling vegetated open-channel flows. in Conference Proceedings of the IX International Conference on Contemporary Achievments in Civil Engineering. 2024;:29-63.
doi:10.14415/CACE2024.03 .

Đorđević, Dejana, "On the application of the double-averaging methodology in modelling vegetated open-channel flows" in Conference Proceedings of the IX International Conference on Contemporary Achievments in Civil Engineering (2024):29-63,
https://doi.org/10.14415/CACE2024.03 . .

TY  - JOUR
AU  - Višnjevac, Nenad
AU  - Šoškić, Mladen
AU  - Mihajlović, Rajica
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3505
AB  - The 3D cadastre presents a modern approach to the development of cadastral information systems, with the role of improving current cadastral systems and overcoming the challenges of a 2D-based approach. Technological advancements, standardization, and scientific research in recent decades have contributed to the development and definition of the 3D cadastre. This positioned the 3D cadastre as an integral part of the future of land administration. However, every country needs to define a solution for itself based on its own legal system and cadastral tradition, while at the same time relying on international standardization and research. Once a 3D cadastral system is developed, it is crucial to ensure the monitoring, evaluation, and maintenance of both the quality of the cadastral data and the system itself throughout its lifecycle. Since 3D cadastres involve geometric data, quality management procedures must address both geometric and alphanumeric data. In this paper, we analyze and present the quality management procedures that should be included during designing, implementing, and maintaining a 3D cadastral system. Some examples based on real cadastral data were used to emphasize the need for improvement in quality management. The presented quality management procedures require further development in order to meet country-specific requirements and to fully support the 3D cadastre information systems.
PB  - MDPI
T2  - ISPRS International Journal of Geo-Information
T1  - Towards Quality Management Procedures in 3D Cadastre
IS  - 5
SP  - 160
VL  - 13
DO  - 10.3390/ijgi13050160
ER  - 

@article{
author = "Višnjevac, Nenad and Šoškić, Mladen and Mihajlović, Rajica",
year = "2024",
abstract = "The 3D cadastre presents a modern approach to the development of cadastral information systems, with the role of improving current cadastral systems and overcoming the challenges of a 2D-based approach. Technological advancements, standardization, and scientific research in recent decades have contributed to the development and definition of the 3D cadastre. This positioned the 3D cadastre as an integral part of the future of land administration. However, every country needs to define a solution for itself based on its own legal system and cadastral tradition, while at the same time relying on international standardization and research. Once a 3D cadastral system is developed, it is crucial to ensure the monitoring, evaluation, and maintenance of both the quality of the cadastral data and the system itself throughout its lifecycle. Since 3D cadastres involve geometric data, quality management procedures must address both geometric and alphanumeric data. In this paper, we analyze and present the quality management procedures that should be included during designing, implementing, and maintaining a 3D cadastral system. Some examples based on real cadastral data were used to emphasize the need for improvement in quality management. The presented quality management procedures require further development in order to meet country-specific requirements and to fully support the 3D cadastre information systems.",
publisher = "MDPI",
journal = "ISPRS International Journal of Geo-Information",
title = "Towards Quality Management Procedures in 3D Cadastre",
number = "5",
pages = "160",
volume = "13",
doi = "10.3390/ijgi13050160"
}

Višnjevac, N., Šoškić, M.,& Mihajlović, R.. (2024). Towards Quality Management Procedures in 3D Cadastre. in ISPRS International Journal of Geo-Information
MDPI., 13(5), 160.
https://doi.org/10.3390/ijgi13050160

Višnjevac N, Šoškić M, Mihajlović R. Towards Quality Management Procedures in 3D Cadastre. in ISPRS International Journal of Geo-Information. 2024;13(5):160.
doi:10.3390/ijgi13050160 .

Višnjevac, Nenad, Šoškić, Mladen, Mihajlović, Rajica, "Towards Quality Management Procedures in 3D Cadastre" in ISPRS International Journal of Geo-Information, 13, no. 5 (2024):160,
https://doi.org/10.3390/ijgi13050160 . .

TY  - JOUR
AU  - Višnjevac, Nenad
AU  - Šoškić, Mladen
AU  - Mihajlović, Rajica
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3504
AB  - 3D katastar kao savremeni pristup razvoju katastarskog informacionog sistema donosi mnoge prednosti i rešava poteškoće koje ima sadašnji katastarski sistem kada je reč o upisu i vizualizaciji 3D kompleksnih situacija. Shodno tome, prelazak na 3D katastarski sistem zahteva znatno više resursa jer je potrebno podatke prikupiti, obraditi, skladištiti, održavati i distribuirati u 3 dimenzije. Da bi se otvorio pristupačniji put ka implementaciji 3D katastra jedan od ponuđenih pristupa predstavlja hibridni model. To podrazumeva da se sadašnji 2D katastarski podaci koriste u što većoj meri a da na onim lokacija na kojima nije moguće nedvosmisleno predstaviti nepokretnosti i granice poseda koristi 3D pristup. U ovom radu obrađeni su i predstavljeni osnovni kriterijumi koji definišu kada je neophodan 3D pristupu u okviru hibridnog modela i shodno tome data osnovna procena odnosa 2D i 3D pristupa na test primeru.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Kriterijumi za primenu hibridnog modela 3D katastra u Srbiji
EP  - 151
IS  - 2
SP  - 145
VL  - 78
DO  - 10.5937/tehnika2402145V
ER  - 

@article{
author = "Višnjevac, Nenad and Šoškić, Mladen and Mihajlović, Rajica",
year = "2024",
abstract = "3D katastar kao savremeni pristup razvoju katastarskog informacionog sistema donosi mnoge prednosti i rešava poteškoće koje ima sadašnji katastarski sistem kada je reč o upisu i vizualizaciji 3D kompleksnih situacija. Shodno tome, prelazak na 3D katastarski sistem zahteva znatno više resursa jer je potrebno podatke prikupiti, obraditi, skladištiti, održavati i distribuirati u 3 dimenzije. Da bi se otvorio pristupačniji put ka implementaciji 3D katastra jedan od ponuđenih pristupa predstavlja hibridni model. To podrazumeva da se sadašnji 2D katastarski podaci koriste u što većoj meri a da na onim lokacija na kojima nije moguće nedvosmisleno predstaviti nepokretnosti i granice poseda koristi 3D pristup. U ovom radu obrađeni su i predstavljeni osnovni kriterijumi koji definišu kada je neophodan 3D pristupu u okviru hibridnog modela i shodno tome data osnovna procena odnosa 2D i 3D pristupa na test primeru.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Kriterijumi za primenu hibridnog modela 3D katastra u Srbiji",
pages = "151-145",
number = "2",
volume = "78",
doi = "10.5937/tehnika2402145V"
}

Višnjevac, N., Šoškić, M.,& Mihajlović, R.. (2024). Kriterijumi za primenu hibridnog modela 3D katastra u Srbiji. in Tehnika
Savez inženjera i tehničara Srbije., 78(2), 145-151.
https://doi.org/10.5937/tehnika2402145V

Višnjevac N, Šoškić M, Mihajlović R. Kriterijumi za primenu hibridnog modela 3D katastra u Srbiji. in Tehnika. 2024;78(2):145-151.
doi:10.5937/tehnika2402145V .

Višnjevac, Nenad, Šoškić, Mladen, Mihajlović, Rajica, "Kriterijumi za primenu hibridnog modela 3D katastra u Srbiji" in Tehnika, 78, no. 2 (2024):145-151,
https://doi.org/10.5937/tehnika2402145V . .

TY  - CONF
AU  - Ilijević, Slavica
AU  - Grekulović, Sanja
AU  - Todorović Drakul, Miljana
AU  - Bojović, Bogdan
PY  - 2024
UR  - https://www.gnp.ucg.ac.me/accepted-paper/
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3503
AB  - The text discusses methods used in geodesy and geophysics to determine the gravitational effect of topographic masses. Three main methods — utilizing the formulas of the right parallelepiped, spherical tesseroid, and flat tesseroid — are applied within Bjerhammar's reduction scheme. The correction for the terrain's gravitational effect is evaluated on a digital terrain model. The research concludes that, overall, the three methods are practically equivalent, even in rough topographic conditions. However, in one test of Bouguer anomalies, formulas involving tesseroids and flat tesseroids show a slightly lower root mean square (RMS) compared to those using standard right parallelepiped formulas.
C3  - 9th International Conference "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2024 – Kolašin, Montenegro, 5-9 March 2024.
T1  - Review of methods for determining the gravitational effect of topographic masses
ER  - 

@conference{
author = "Ilijević, Slavica and Grekulović, Sanja and Todorović Drakul, Miljana and Bojović, Bogdan",
year = "2024",
abstract = "The text discusses methods used in geodesy and geophysics to determine the gravitational effect of topographic masses. Three main methods — utilizing the formulas of the right parallelepiped, spherical tesseroid, and flat tesseroid — are applied within Bjerhammar's reduction scheme. The correction for the terrain's gravitational effect is evaluated on a digital terrain model. The research concludes that, overall, the three methods are practically equivalent, even in rough topographic conditions. However, in one test of Bouguer anomalies, formulas involving tesseroids and flat tesseroids show a slightly lower root mean square (RMS) compared to those using standard right parallelepiped formulas.",
journal = "9th International Conference "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2024 – Kolašin, Montenegro, 5-9 March 2024.",
title = "Review of methods for determining the gravitational effect of topographic masses"
}

Ilijević, S., Grekulović, S., Todorović Drakul, M.,& Bojović, B.. (2024). Review of methods for determining the gravitational effect of topographic masses. in 9th International Conference "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2024 – Kolašin, Montenegro, 5-9 March 2024..

Ilijević S, Grekulović S, Todorović Drakul M, Bojović B. Review of methods for determining the gravitational effect of topographic masses. in 9th International Conference "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2024 – Kolašin, Montenegro, 5-9 March 2024.. 2024;..

Ilijević, Slavica, Grekulović, Sanja, Todorović Drakul, Miljana, Bojović, Bogdan, "Review of methods for determining the gravitational effect of topographic masses" in 9th International Conference "CIVIL ENGINEERING – SCIENCE AND PRACTICE" GNP 2024 – Kolašin, Montenegro, 5-9 March 2024. (2024).

TY  - JOUR
AU  - Odalović, Oleg
AU  - Petković, Dušan
AU  - Grekulović, Sanja
AU  - Todorović Drakul, Miljana
PY  - 2024
UR  - https://ojs.gi.sanu.ac.rs/index.php/zbornik/article/view/782
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3502
AB  - Since the early 21st century, Global Positioning System (GPS) technology has dominated geodetic reference networks. Almost all countries established a permanent Global Navigation Satellite System (GNSS) station network to augment all available GNSS systems. By the end of 2005, Serbia completed the Active Geodetic Reference Network as a particular project of Serbia's Republic Geodetic Authority (RGA). Besides RGA, two private companies, Vekom and Geotaur, have established permanent station networks. This paper assesses the compliance of all the three networks, and network results are evaluated against the spatial distance determined by classical geodetic methods. When all available GNSS constellations are utilized, NAVSTAR, GLONASS, BEIDOU, and GALILEO, in the processing procedure, the established networks in Serbia align within a margin of about 3 mm across all coordinate axes. The results obtained within the research indicate that by using GNSS networks, it is possible to provide the coordinates of the points for the establishment of the national spatial reference system of Serbia, the reference system in almost all engineering fields, reference systems for the maintenance works of the real estate cadastre, and it is also possible to provide coordinates of points that can be used to define local, national, and world reference heights surfaces.
PB  - Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia
T2  - Journal of the Geographical Institute “Jovan Cvijić” SASA
T1  - A compliance assessment of GNSS station networks in Serbia
EP  - 61
IS  - 1
SP  - 47
VL  - 74
DO  - 10.2298/IJGI2401047O
ER  - 

@article{
author = "Odalović, Oleg and Petković, Dušan and Grekulović, Sanja and Todorović Drakul, Miljana",
year = "2024",
abstract = "Since the early 21st century, Global Positioning System (GPS) technology has dominated geodetic reference networks. Almost all countries established a permanent Global Navigation Satellite System (GNSS) station network to augment all available GNSS systems. By the end of 2005, Serbia completed the Active Geodetic Reference Network as a particular project of Serbia's Republic Geodetic Authority (RGA). Besides RGA, two private companies, Vekom and Geotaur, have established permanent station networks. This paper assesses the compliance of all the three networks, and network results are evaluated against the spatial distance determined by classical geodetic methods. When all available GNSS constellations are utilized, NAVSTAR, GLONASS, BEIDOU, and GALILEO, in the processing procedure, the established networks in Serbia align within a margin of about 3 mm across all coordinate axes. The results obtained within the research indicate that by using GNSS networks, it is possible to provide the coordinates of the points for the establishment of the national spatial reference system of Serbia, the reference system in almost all engineering fields, reference systems for the maintenance works of the real estate cadastre, and it is also possible to provide coordinates of points that can be used to define local, national, and world reference heights surfaces.",
publisher = "Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia",
journal = "Journal of the Geographical Institute “Jovan Cvijić” SASA",
title = "A compliance assessment of GNSS station networks in Serbia",
pages = "61-47",
number = "1",
volume = "74",
doi = "10.2298/IJGI2401047O"
}

Odalović, O., Petković, D., Grekulović, S.,& Todorović Drakul, M.. (2024). A compliance assessment of GNSS station networks in Serbia. in Journal of the Geographical Institute “Jovan Cvijić” SASA
Geographical Institute “Jovan Cvijić” of the Serbian Academy of Sciences and Arts (SASA), 9 Djure Jakšića St., Belgrade 11000, Serbia., 74(1), 47-61.
https://doi.org/10.2298/IJGI2401047O

Odalović O, Petković D, Grekulović S, Todorović Drakul M. A compliance assessment of GNSS station networks in Serbia. in Journal of the Geographical Institute “Jovan Cvijić” SASA. 2024;74(1):47-61.
doi:10.2298/IJGI2401047O .

Odalović, Oleg, Petković, Dušan, Grekulović, Sanja, Todorović Drakul, Miljana, "A compliance assessment of GNSS station networks in Serbia" in Journal of the Geographical Institute “Jovan Cvijić” SASA, 74, no. 1 (2024):47-61,
https://doi.org/10.2298/IJGI2401047O . .

TY  - JOUR
AU  - Mirković, Uroš
AU  - Kuzmanović, Vladan
AU  - Todorović, Goran
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3500
AB  - This paper examines the influence of monolith length on the temperature field of concrete gravity dams built using the block method. The developed 3D model is capable of conducting a thermal analysis of a 95.0 m high concrete gravity dam built using the block method, where each newly cast block represents a new analysis phase. The calculation accounts for the period of construction, the filling of the reservoir, and the service for a total duration of about 5 years. The thermal properties of the material, the influence of cement hydration heat, the temperature of the surrounding rock mass, the temperature of the fresh concrete mixture, and the corresponding boundary conditions defining a heat transfer were taken into account. The height and width of the blocks, as well as the sequence of concreting, were considered invariable, while the length of the blocks (dimension in the direction of the dam’s axis equal to the monolith length) varied, with values of 10.0, 12.5, 15.0, and 20.0 m. The obtained calculation results for the control nodes showed that the maximum reduction in the monolith length (from 20.0 m to 10.0 m) caused a decrease in the maximum temperature values of the concrete (from 1.6 to 3.4 °C, depending on the control node). Also, the results showed that, by reducing the length of the monolith, there was a delay in the moment at which the maximum temperature values of the concrete appeared in the selected control node. The delay in reaching the maximum, in relation to the 10.0 m long monolith, was from 7 days (for points on the crest dam) to 49 days (for points in the central zone of the monolith) for the other considered monolith lengths. The above indicates the importance of concrete temperature control for longer monoliths, especially during construction in extreme air temperatures. The main contribution of the conducted analysis is the development of insight into temperature field changes depending on monolith length, which can help engineers during the design and construction of new, as well as the maintenance of existing, dams.
PB  - MDPI
T2  - Applied Sciences
T1  - Influence of Monolith Length on Temperature Field of Concrete Gravity Dams
SP  - 3248
VL  - 14(8)
DO  - 10.3390/app14083248
ER  - 

@article{
author = "Mirković, Uroš and Kuzmanović, Vladan and Todorović, Goran",
year = "2024",
abstract = "This paper examines the influence of monolith length on the temperature field of concrete gravity dams built using the block method. The developed 3D model is capable of conducting a thermal analysis of a 95.0 m high concrete gravity dam built using the block method, where each newly cast block represents a new analysis phase. The calculation accounts for the period of construction, the filling of the reservoir, and the service for a total duration of about 5 years. The thermal properties of the material, the influence of cement hydration heat, the temperature of the surrounding rock mass, the temperature of the fresh concrete mixture, and the corresponding boundary conditions defining a heat transfer were taken into account. The height and width of the blocks, as well as the sequence of concreting, were considered invariable, while the length of the blocks (dimension in the direction of the dam’s axis equal to the monolith length) varied, with values of 10.0, 12.5, 15.0, and 20.0 m. The obtained calculation results for the control nodes showed that the maximum reduction in the monolith length (from 20.0 m to 10.0 m) caused a decrease in the maximum temperature values of the concrete (from 1.6 to 3.4 °C, depending on the control node). Also, the results showed that, by reducing the length of the monolith, there was a delay in the moment at which the maximum temperature values of the concrete appeared in the selected control node. The delay in reaching the maximum, in relation to the 10.0 m long monolith, was from 7 days (for points on the crest dam) to 49 days (for points in the central zone of the monolith) for the other considered monolith lengths. The above indicates the importance of concrete temperature control for longer monoliths, especially during construction in extreme air temperatures. The main contribution of the conducted analysis is the development of insight into temperature field changes depending on monolith length, which can help engineers during the design and construction of new, as well as the maintenance of existing, dams.",
publisher = "MDPI",
journal = "Applied Sciences",
title = "Influence of Monolith Length on Temperature Field of Concrete Gravity Dams",
pages = "3248",
volume = "14(8)",
doi = "10.3390/app14083248"
}

Mirković, U., Kuzmanović, V.,& Todorović, G.. (2024). Influence of Monolith Length on Temperature Field of Concrete Gravity Dams. in Applied Sciences
MDPI., 14(8), 3248.
https://doi.org/10.3390/app14083248

Mirković U, Kuzmanović V, Todorović G. Influence of Monolith Length on Temperature Field of Concrete Gravity Dams. in Applied Sciences. 2024;14(8):3248.
doi:10.3390/app14083248 .

Mirković, Uroš, Kuzmanović, Vladan, Todorović, Goran, "Influence of Monolith Length on Temperature Field of Concrete Gravity Dams" in Applied Sciences, 14(8) (2024):3248,
https://doi.org/10.3390/app14083248 . .

TY  - JOUR
AU  - Lazović Radovanović, Marija
AU  - Nikolić, Jelena
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3501
AB  - This paper focuses on the experimental investigation of the axial load capacity of CFT
(concrete-filled steel tube) columns under actual construction conditions during building reconstruction. A total of four samples were loaded up to failure. The varied parameters were the column length and absence/presence of the concrete infill within the steel tube. Further, the analysis is extended to developing a numerical model in the finite element-based software ABAQUS version 6.9. This numerical model includes material and geometrical nonlinearities and was validated with the experimental results. The contribution of the concrete core to the column capacity and the concrete core confinement effect are discussed. Finally, the column capacity was calculated according to several design codes: the Eurocode 4 with and without considering the confinement effect, American specifications, Australian standards, the American Institute of Steel Construction, and the Architectural Institute of Japan. The Eurocode 4 considering the confinement effect provides the closest results to those obtained in the tests.
PB  - MDPI
T2  - Buildings
T1  - Experimental Investigation and Numerical Analysis of the Axial Load Capacity of Circular Concrete-Filled Tubular Columns
VL  - 14
DO  - 10.3390/buildings14051329
ER  - 

@article{
author = "Lazović Radovanović, Marija and Nikolić, Jelena",
year = "2024",
abstract = "This paper focuses on the experimental investigation of the axial load capacity of CFT
(concrete-filled steel tube) columns under actual construction conditions during building reconstruction. A total of four samples were loaded up to failure. The varied parameters were the column length and absence/presence of the concrete infill within the steel tube. Further, the analysis is extended to developing a numerical model in the finite element-based software ABAQUS version 6.9. This numerical model includes material and geometrical nonlinearities and was validated with the experimental results. The contribution of the concrete core to the column capacity and the concrete core confinement effect are discussed. Finally, the column capacity was calculated according to several design codes: the Eurocode 4 with and without considering the confinement effect, American specifications, Australian standards, the American Institute of Steel Construction, and the Architectural Institute of Japan. The Eurocode 4 considering the confinement effect provides the closest results to those obtained in the tests.",
publisher = "MDPI",
journal = "Buildings",
title = "Experimental Investigation and Numerical Analysis of the Axial Load Capacity of Circular Concrete-Filled Tubular Columns",
volume = "14",
doi = "10.3390/buildings14051329"
}

Lazović Radovanović, M.,& Nikolić, J.. (2024). Experimental Investigation and Numerical Analysis of the Axial Load Capacity of Circular Concrete-Filled Tubular Columns. in Buildings
MDPI., 14.
https://doi.org/10.3390/buildings14051329

Lazović Radovanović M, Nikolić J. Experimental Investigation and Numerical Analysis of the Axial Load Capacity of Circular Concrete-Filled Tubular Columns. in Buildings. 2024;14.
doi:10.3390/buildings14051329 .

Lazović Radovanović, Marija, Nikolić, Jelena, "Experimental Investigation and Numerical Analysis of the Axial Load Capacity of Circular Concrete-Filled Tubular Columns" in Buildings, 14 (2024),
https://doi.org/10.3390/buildings14051329 . .

TY  - CONF
AU  - Mitrović, Stefan
AU  - Vidović, Milica
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3482
AB  - In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.
C3  - Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024
T1  - Experimental testing of 3D printed concrete truss girder
EP  - 523
SP  - 517
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3482
ER  - 

@conference{
author = "Mitrović, Stefan and Vidović, Milica and Ignjatović, Ivan and Dragaš, Jelena",
year = "2024",
abstract = "In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.",
journal = "Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024",
title = "Experimental testing of 3D printed concrete truss girder",
pages = "523-517",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3482"
}

Mitrović, S., Vidović, M., Ignjatović, I.,& Dragaš, J.. (2024). Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024, 517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482

Mitrović S, Vidović M, Ignjatović I, Dragaš J. Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024. 2024;:517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

Mitrović, Stefan, Vidović, Milica, Ignjatović, Ivan, Dragaš, Jelena, "Experimental testing of 3D printed concrete truss girder" in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024 (2024):517-523,
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

TY  - JOUR
AU  - Nikolić, Jelena
AU  - Tošić, Nikola
AU  - Murcia-Delso, Juan
AU  - Kostić, Svetlana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3445
AB  - This paper summarises current research findings related to the behaviour and simulation of a relatively new type
of structural component: recycled aggregate concrete-filled steel tube columns (RACFST). The first part of the
paper presents a review of the latest experimental campaigns on RACFST columns subjected to a variety of
loading conditions. For each of loading condition, highlight observations about the behaviour of RACFST columns are presented. The second part of the paper provides a summary of numerical modelling approaches
developed for simulating the structural behaviour of RACFST columns. Special attention is paid to the selection
and calibration of material models for recycled aggregate concrete. Finally, directions for future investigations in
this area are outlined and discussed. The review will benefit researchers and professionals seeking to gain an indepth understanding of the behaviour of RACFST columns, and fills a gap in existing literature regarding a
number of practical issues related to the numerical modelling of these components.
PB  - Elsevier
T2  - Engineering Structures
T1  - Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes
VL  - 303
DO  - 10.1016/j.engstruct.2024.117514
ER  - 

@article{
author = "Nikolić, Jelena and Tošić, Nikola and Murcia-Delso, Juan and Kostić, Svetlana",
year = "2024",
abstract = "This paper summarises current research findings related to the behaviour and simulation of a relatively new type
of structural component: recycled aggregate concrete-filled steel tube columns (RACFST). The first part of the
paper presents a review of the latest experimental campaigns on RACFST columns subjected to a variety of
loading conditions. For each of loading condition, highlight observations about the behaviour of RACFST columns are presented. The second part of the paper provides a summary of numerical modelling approaches
developed for simulating the structural behaviour of RACFST columns. Special attention is paid to the selection
and calibration of material models for recycled aggregate concrete. Finally, directions for future investigations in
this area are outlined and discussed. The review will benefit researchers and professionals seeking to gain an indepth understanding of the behaviour of RACFST columns, and fills a gap in existing literature regarding a
number of practical issues related to the numerical modelling of these components.",
publisher = "Elsevier",
journal = "Engineering Structures",
title = "Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes",
volume = "303",
doi = "10.1016/j.engstruct.2024.117514"
}

Nikolić, J., Tošić, N., Murcia-Delso, J.,& Kostić, S.. (2024). Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes. in Engineering Structures
Elsevier., 303.
https://doi.org/10.1016/j.engstruct.2024.117514

Nikolić J, Tošić N, Murcia-Delso J, Kostić S. Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes. in Engineering Structures. 2024;303.
doi:10.1016/j.engstruct.2024.117514 .

Nikolić, Jelena, Tošić, Nikola, Murcia-Delso, Juan, Kostić, Svetlana, "Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes" in Engineering Structures, 303 (2024),
https://doi.org/10.1016/j.engstruct.2024.117514 . .

TY  - CONF
AU  - Govedarica, Ognjen
AU  - Karanović, Dj.
AU  - Stanić, Filip
AU  - Škondrić, M.
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3488
AB  - - Incorporating waste materials into useful building materials and environmental benefits;
- Understanding benefits of the addition of solidified wastewater treatment sludge (SWWTS) to porous concrete pavements;
- Wise application of waste in urban infrastructure adopting and applying the principles of circular economy.
PB  - Delft University of Technology, NL
C3  - 16th International Conference on Urban Drainage, Delft, 9-14 June, 2024
T1  - Circular Economy Innovation in Urban Infrastructure: Harnessing the Power of Solidified WWTP Sludge in Porous Concrete Pavements for Flood-Resilient Cities
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3488
ER  - 

@conference{
author = "Govedarica, Ognjen and Karanović, Dj. and Stanić, Filip and Škondrić, M. and Lekić, Branislava and Rajaković-Ognjanović, Vladana",
year = "2024",
abstract = "- Incorporating waste materials into useful building materials and environmental benefits;
- Understanding benefits of the addition of solidified wastewater treatment sludge (SWWTS) to porous concrete pavements;
- Wise application of waste in urban infrastructure adopting and applying the principles of circular economy.",
publisher = "Delft University of Technology, NL",
journal = "16th International Conference on Urban Drainage, Delft, 9-14 June, 2024",
title = "Circular Economy Innovation in Urban Infrastructure: Harnessing the Power of Solidified WWTP Sludge in Porous Concrete Pavements for Flood-Resilient Cities",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3488"
}

Govedarica, O., Karanović, Dj., Stanić, F., Škondrić, M., Lekić, B.,& Rajaković-Ognjanović, V.. (2024). Circular Economy Innovation in Urban Infrastructure: Harnessing the Power of Solidified WWTP Sludge in Porous Concrete Pavements for Flood-Resilient Cities. in 16th International Conference on Urban Drainage, Delft, 9-14 June, 2024
Delft University of Technology, NL..
https://hdl.handle.net/21.15107/rcub_grafar_3488

Govedarica O, Karanović D, Stanić F, Škondrić M, Lekić B, Rajaković-Ognjanović V. Circular Economy Innovation in Urban Infrastructure: Harnessing the Power of Solidified WWTP Sludge in Porous Concrete Pavements for Flood-Resilient Cities. in 16th International Conference on Urban Drainage, Delft, 9-14 June, 2024. 2024;.
https://hdl.handle.net/21.15107/rcub_grafar_3488 .

Govedarica, Ognjen, Karanović, Dj., Stanić, Filip, Škondrić, M., Lekić, Branislava, Rajaković-Ognjanović, Vladana, "Circular Economy Innovation in Urban Infrastructure: Harnessing the Power of Solidified WWTP Sludge in Porous Concrete Pavements for Flood-Resilient Cities" in 16th International Conference on Urban Drainage, Delft, 9-14 June, 2024 (2024),
https://hdl.handle.net/21.15107/rcub_grafar_3488 .

TY  - CONF
AU  - Stanić, Filip
AU  - Jaćimović, Nenad
AU  - Govedarica, Ognjen
AU  - Lekić, Branislava
AU  - Vasilić, Željko
AU  - Ranđelović, Anja
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3487
C3  - 16th International Conference on Urban Drainage, Delft, June, 2024
T1  - An improved semi-analytical solution for determining water permeability of highly pervious porous materials
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3487
ER  - 

@conference{
author = "Stanić, Filip and Jaćimović, Nenad and Govedarica, Ognjen and Lekić, Branislava and Vasilić, Željko and Ranđelović, Anja",
year = "2024",
journal = "16th International Conference on Urban Drainage, Delft, June, 2024",
title = "An improved semi-analytical solution for determining water permeability of highly pervious porous materials",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3487"
}

Stanić, F., Jaćimović, N., Govedarica, O., Lekić, B., Vasilić, Ž.,& Ranđelović, A.. (2024). An improved semi-analytical solution for determining water permeability of highly pervious porous materials. in 16th International Conference on Urban Drainage, Delft, June, 2024.
https://hdl.handle.net/21.15107/rcub_grafar_3487

Stanić F, Jaćimović N, Govedarica O, Lekić B, Vasilić Ž, Ranđelović A. An improved semi-analytical solution for determining water permeability of highly pervious porous materials. in 16th International Conference on Urban Drainage, Delft, June, 2024. 2024;.
https://hdl.handle.net/21.15107/rcub_grafar_3487 .

Stanić, Filip, Jaćimović, Nenad, Govedarica, Ognjen, Lekić, Branislava, Vasilić, Željko, Ranđelović, Anja, "An improved semi-analytical solution for determining water permeability of highly pervious porous materials" in 16th International Conference on Urban Drainage, Delft, June, 2024 (2024),
https://hdl.handle.net/21.15107/rcub_grafar_3487 .

TY  - JOUR
AU  - Arnaut, Filip
AU  - Đurić, Dragana
AU  - Djuric, Uros
AU  - Samardzic-Petrovic, Mileva
AU  - Peshevski, Igor
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3486
AB  - The Random Forest (RF) and K nearest neighbors (KNN) machine learning (ML) algorithms were evaluated for their ability to predict ophiolite occurrences, in the East Vardar Zone (EVZ) of central North Macedonia. A predictive map of the investigated area was created using three data sources: geophysical data (digital elevation model, gravity and geomagnetic), multispectral optical satellite images (Landsat 7 ETM + and their derivatives), and geological data (distance to fault map
and ophiolite outcrops map). The research included a comparison and discussion on the statistical and geological findings derived from different training dataset class ratios in relation to a testing dataset characterized by significant class imbalance. The results suggest that the precise selection of a suitable class balance for the training dataset is a critical factor in achieving accurate ophiolite prediction with RF and KNN algorithms. The analysis of feature importance revealed that the Bouguer gravity anomaly map, total intensity of the Earth’s magnetic field reduced to the pole map, distance to fault map, band ratio BR3 map obtained from multispectral satellite images, and digital elevation model are the most significant features for predicting ophiolites within the EVZ. KNN showed poorer results compared to RF in terms of both the evaluation
metrics and visual analysis of prediction maps. The methods applied in this research can be applied for predictive mapping of complex geo-tectonic units covered by dense vegetation, and may indicate the presence of these units even if they were not previously mapped, particularly when geophysical data are used as features.
PB  - Springer-Verlag GmbH Germany
T2  - Earth Science Informatics
T1  - Application of geophysical and multispectral imagery data for predictive mapping of a complex geo‑tectonic unit: a case study of the East Vardar Ophiolite Zone, North‑Macedonia
EP  - 1661
IS  - 2
SP  - 1645
VL  - 17
DO  - 10.1007/s12145-024-01243-4
ER  - 

@article{
author = "Arnaut, Filip and Đurić, Dragana and Djuric, Uros and Samardzic-Petrovic, Mileva and Peshevski, Igor",
year = "2024",
abstract = "The Random Forest (RF) and K nearest neighbors (KNN) machine learning (ML) algorithms were evaluated for their ability to predict ophiolite occurrences, in the East Vardar Zone (EVZ) of central North Macedonia. A predictive map of the investigated area was created using three data sources: geophysical data (digital elevation model, gravity and geomagnetic), multispectral optical satellite images (Landsat 7 ETM + and their derivatives), and geological data (distance to fault map
and ophiolite outcrops map). The research included a comparison and discussion on the statistical and geological findings derived from different training dataset class ratios in relation to a testing dataset characterized by significant class imbalance. The results suggest that the precise selection of a suitable class balance for the training dataset is a critical factor in achieving accurate ophiolite prediction with RF and KNN algorithms. The analysis of feature importance revealed that the Bouguer gravity anomaly map, total intensity of the Earth’s magnetic field reduced to the pole map, distance to fault map, band ratio BR3 map obtained from multispectral satellite images, and digital elevation model are the most significant features for predicting ophiolites within the EVZ. KNN showed poorer results compared to RF in terms of both the evaluation
metrics and visual analysis of prediction maps. The methods applied in this research can be applied for predictive mapping of complex geo-tectonic units covered by dense vegetation, and may indicate the presence of these units even if they were not previously mapped, particularly when geophysical data are used as features.",
publisher = "Springer-Verlag GmbH Germany",
journal = "Earth Science Informatics",
title = "Application of geophysical and multispectral imagery data for predictive mapping of a complex geo‑tectonic unit: a case study of the East Vardar Ophiolite Zone, North‑Macedonia",
pages = "1661-1645",
number = "2",
volume = "17",
doi = "10.1007/s12145-024-01243-4"
}

Arnaut, F., Đurić, D., Djuric, U., Samardzic-Petrovic, M.,& Peshevski, I.. (2024). Application of geophysical and multispectral imagery data for predictive mapping of a complex geo‑tectonic unit: a case study of the East Vardar Ophiolite Zone, North‑Macedonia. in Earth Science Informatics
Springer-Verlag GmbH Germany., 17(2), 1645-1661.
https://doi.org/10.1007/s12145-024-01243-4

Arnaut F, Đurić D, Djuric U, Samardzic-Petrovic M, Peshevski I. Application of geophysical and multispectral imagery data for predictive mapping of a complex geo‑tectonic unit: a case study of the East Vardar Ophiolite Zone, North‑Macedonia. in Earth Science Informatics. 2024;17(2):1645-1661.
doi:10.1007/s12145-024-01243-4 .

Arnaut, Filip, Đurić, Dragana, Djuric, Uros, Samardzic-Petrovic, Mileva, Peshevski, Igor, "Application of geophysical and multispectral imagery data for predictive mapping of a complex geo‑tectonic unit: a case study of the East Vardar Ophiolite Zone, North‑Macedonia" in Earth Science Informatics, 17, no. 2 (2024):1645-1661,
https://doi.org/10.1007/s12145-024-01243-4 . .

TY  - JOUR
AU  - Bursać, Milan
AU  - Kostić, Svetlana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3489
AB  - The paper presents a nonlinear concentrated plasticity frame element for advanced analysis of steel frames exposed to elevated temperatures. The element extends the formulation based on the generalized plasticity material model that was successfully applied to the analysis of steel and composite structures. It considers the material's nonlinear behavior, temperature-induced loading, strength and stiffness degradation typical for structures under fire conditions. The nonlinear geometry is taken into account with the corotational formulation. Because of the generalized plasticity relations adoption, the element can describe the gradual yielding of cross sections. At the same time, the implemented return mapping algorithm ensures the element's high computational efficiency. The governing element equations, selection of parameters and computer implementation are discussed in the paper, followed by element validation through the number of experimental data examples and other numerical models. The comparative analysis demonstrated the element's versatility and capability to accurately predict the structural response of steel frame structures exposed to fire.
PB  - Elsevier
T2  - Computers and Structures
T1  - An efficient model for 3D analysis of steel frames exposed to fire
VL  - 297
DO  - 10.1016/j.compstruc.2024.107363
ER  - 

@article{
author = "Bursać, Milan and Kostić, Svetlana",
year = "2024",
abstract = "The paper presents a nonlinear concentrated plasticity frame element for advanced analysis of steel frames exposed to elevated temperatures. The element extends the formulation based on the generalized plasticity material model that was successfully applied to the analysis of steel and composite structures. It considers the material's nonlinear behavior, temperature-induced loading, strength and stiffness degradation typical for structures under fire conditions. The nonlinear geometry is taken into account with the corotational formulation. Because of the generalized plasticity relations adoption, the element can describe the gradual yielding of cross sections. At the same time, the implemented return mapping algorithm ensures the element's high computational efficiency. The governing element equations, selection of parameters and computer implementation are discussed in the paper, followed by element validation through the number of experimental data examples and other numerical models. The comparative analysis demonstrated the element's versatility and capability to accurately predict the structural response of steel frame structures exposed to fire.",
publisher = "Elsevier",
journal = "Computers and Structures",
title = "An efficient model for 3D analysis of steel frames exposed to fire",
volume = "297",
doi = "10.1016/j.compstruc.2024.107363"
}

Bursać, M.,& Kostić, S.. (2024). An efficient model for 3D analysis of steel frames exposed to fire. in Computers and Structures
Elsevier., 297.
https://doi.org/10.1016/j.compstruc.2024.107363

Bursać M, Kostić S. An efficient model for 3D analysis of steel frames exposed to fire. in Computers and Structures. 2024;297.
doi:10.1016/j.compstruc.2024.107363 .

Bursać, Milan, Kostić, Svetlana, "An efficient model for 3D analysis of steel frames exposed to fire" in Computers and Structures, 297 (2024),
https://doi.org/10.1016/j.compstruc.2024.107363 . .

TY  - JOUR
AU  - Đorđević, Filip
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3484
AB  - Masonry structures in addition to their long heritage are still widely used in civil engineering practice. It should be emphasized that a lot of research has already been done on the seismic behavior of masonry structures. However, due to the nature of such a problem, its complexity and seriousness, the development of numerical models and their connection with experimental tests are always important. This is particularly significant considering their vulnerability to the action of horizontal forces generated during seismic excitations. In recent decades, many researchers have tried to capture the behavior of unreinforced masonry (URM) structures or reinforced concrete (RC) frames with masonry infills exposed to earthquakes, using different approaches. This paper tackles numerical modeling based on the finite element method (FEM) for the estimation of the dynamic response of two adjacent interacting URM units, subjected to shaking table motions. Geometrical and material properties of the specimen are provided by the Horizon 2020 project SERA-AIMS (The Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe – Seismic Testing of Adjacent Interacting Masonry Structures). The analyses of dynamic performance were executed in SAP2000 software. Obtained results on the numerical model provide useful guidelines for modeling the nonlinear seismic behavior of masonry buildings.
PB  - IPSI, Belgrade
T2  - IPSI Transactions on Internet Research
T1  - Numerical Modeling of Two Adjacent Interacting URM Structures
EP  - 78
IS  - 1
SP  - 70
VL  - 20
DO  - 10.58245/ipsi.tir.2401.07
ER  - 

@article{
author = "Đorđević, Filip",
year = "2024",
abstract = "Masonry structures in addition to their long heritage are still widely used in civil engineering practice. It should be emphasized that a lot of research has already been done on the seismic behavior of masonry structures. However, due to the nature of such a problem, its complexity and seriousness, the development of numerical models and their connection with experimental tests are always important. This is particularly significant considering their vulnerability to the action of horizontal forces generated during seismic excitations. In recent decades, many researchers have tried to capture the behavior of unreinforced masonry (URM) structures or reinforced concrete (RC) frames with masonry infills exposed to earthquakes, using different approaches. This paper tackles numerical modeling based on the finite element method (FEM) for the estimation of the dynamic response of two adjacent interacting URM units, subjected to shaking table motions. Geometrical and material properties of the specimen are provided by the Horizon 2020 project SERA-AIMS (The Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe – Seismic Testing of Adjacent Interacting Masonry Structures). The analyses of dynamic performance were executed in SAP2000 software. Obtained results on the numerical model provide useful guidelines for modeling the nonlinear seismic behavior of masonry buildings.",
publisher = "IPSI, Belgrade",
journal = "IPSI Transactions on Internet Research",
title = "Numerical Modeling of Two Adjacent Interacting URM Structures",
pages = "78-70",
number = "1",
volume = "20",
doi = "10.58245/ipsi.tir.2401.07"
}

Đorđević, F.. (2024). Numerical Modeling of Two Adjacent Interacting URM Structures. in IPSI Transactions on Internet Research
IPSI, Belgrade., 20(1), 70-78.
https://doi.org/10.58245/ipsi.tir.2401.07

Đorđević F. Numerical Modeling of Two Adjacent Interacting URM Structures. in IPSI Transactions on Internet Research. 2024;20(1):70-78.
doi:10.58245/ipsi.tir.2401.07 .

Đorđević, Filip, "Numerical Modeling of Two Adjacent Interacting URM Structures" in IPSI Transactions on Internet Research, 20, no. 1 (2024):70-78,
https://doi.org/10.58245/ipsi.tir.2401.07 . .

TY  - CONF
AU  - Ranisavljević, Maja
AU  - Dobrić, Jelena
AU  - Filipović, Aljoša
AU  - Spremić, Milan
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3483
AB  - Nowadays, numerous experimentally, numerically and analytically based research have been
performed to evaluate the structural responses and ultimate capacity of beams with web
openings, but mostly under bending. However, in practice, the application of steel cellular
elements dominantly loaded by axial pressure is very common. With the lack of appropriate
design approaches, we rely on engineering judgement, which can result in uneconomic, time-
consuming, or unsafe solutions. To ensure the safety of a structure it is necessary to assess its
structural resilience.
An overview of the existing experimental study on compressed I-section short columns with web
openings, assessment of the impact of openings’ size and shape on cross-section deformation
and resistance capacity under pure compression was performed. To accomplish an adequate and
easy-to-use design method for hot rolled perforated columns, the design procedures stated in: (i)
draft version of new European code prEN 1993-1-13, (ii) the Direct Strength Method (DSM) in
American standard AISI S100-16 and (iii) the Continuous Strength Method (CSM) in prEN
1993-1-4 were evaluated based on experimental data, and the obtained outcomes are briefly
presented in this paper. Although none of these design methods include all aspects of observed
case – hot rolled perforated elements under compression (Eurocode has a strict limit of axial
force, CSM and DSM primarily refer to cold-formed steel sections and do not recognize the
existence of openings at all), they turned out to be quite accurate. The corresponding results were
obtained by modifying those procedures, so they better reflect a case of interest. Thus, DSM
method didn’t need any modifications, and CSM had the most.
PB  - University of Montenegro, Faculty of Civil Engineering
C3  - Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
T1  - Design cross-section resistances of perforated columns under compression
EP  - 354
SP  - 347
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3483
ER  - 

@conference{
author = "Ranisavljević, Maja and Dobrić, Jelena and Filipović, Aljoša and Spremić, Milan",
year = "2024",
abstract = "Nowadays, numerous experimentally, numerically and analytically based research have been
performed to evaluate the structural responses and ultimate capacity of beams with web
openings, but mostly under bending. However, in practice, the application of steel cellular
elements dominantly loaded by axial pressure is very common. With the lack of appropriate
design approaches, we rely on engineering judgement, which can result in uneconomic, time-
consuming, or unsafe solutions. To ensure the safety of a structure it is necessary to assess its
structural resilience.
An overview of the existing experimental study on compressed I-section short columns with web
openings, assessment of the impact of openings’ size and shape on cross-section deformation
and resistance capacity under pure compression was performed. To accomplish an adequate and
easy-to-use design method for hot rolled perforated columns, the design procedures stated in: (i)
draft version of new European code prEN 1993-1-13, (ii) the Direct Strength Method (DSM) in
American standard AISI S100-16 and (iii) the Continuous Strength Method (CSM) in prEN
1993-1-4 were evaluated based on experimental data, and the obtained outcomes are briefly
presented in this paper. Although none of these design methods include all aspects of observed
case – hot rolled perforated elements under compression (Eurocode has a strict limit of axial
force, CSM and DSM primarily refer to cold-formed steel sections and do not recognize the
existence of openings at all), they turned out to be quite accurate. The corresponding results were
obtained by modifying those procedures, so they better reflect a case of interest. Thus, DSM
method didn’t need any modifications, and CSM had the most.",
publisher = "University of Montenegro, Faculty of Civil Engineering",
journal = "Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024",
title = "Design cross-section resistances of perforated columns under compression",
pages = "354-347",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3483"
}

Ranisavljević, M., Dobrić, J., Filipović, A.,& Spremić, M.. (2024). Design cross-section resistances of perforated columns under compression. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
University of Montenegro, Faculty of Civil Engineering., 347-354.
https://hdl.handle.net/21.15107/rcub_grafar_3483

Ranisavljević M, Dobrić J, Filipović A, Spremić M. Design cross-section resistances of perforated columns under compression. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024. 2024;:347-354.
https://hdl.handle.net/21.15107/rcub_grafar_3483 .

Ranisavljević, Maja, Dobrić, Jelena, Filipović, Aljoša, Spremić, Milan, "Design cross-section resistances of perforated columns under compression" in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024 (2024):347-354,
https://hdl.handle.net/21.15107/rcub_grafar_3483 .

TY  - CONF
AU  - Jakovljević, Isidora
AU  - Gluhović, Nina
AU  - Spremić, Milan
AU  - Rajnović, Dušan
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3469
AB  - Ground floors of industrial buildings, fully supported on the ground or piles, are usually made
of several concrete segments connected through free-movement construction joints. These joints
should provide shear load transfer of the slab and minimise its vertical displacements while
allowing slab horizontal movement to prevent damage due to concrete dry shrinkage. The
construction joint “Dilat 08”, consisting of round steel dowels and steel formwork, was
experimentally tested in a laboratory environment to determine its behaviour to shear load. The
experimental double-shear setup consisted of three slabs connecting through the “Dilat 08” join
system, with two side slabs fully supported on the base and the middle slab on which the vertical
loading was applied. Specimens were formed with a gap of 10 mm between adjacent slabs to
simulate the construction joint opening. Two construction joint orientations were investigated
introducing the vertical load to the slab with a steel plate on the edge and to the slab with an
angle profile on the edge. Experimental testing of both specimens resulted in construction joint
failure due to concrete cracking around steel dowels, near the edges of the middle slab. The
investigation confirmed that the joint orientation affects the joint shear response, demonstrating
larger joint resistance when the steel plate is installed in the slab subjected to failure. Although
contributing to the joint bending stiffness before formwork installation on the site, the horizontal
leg of the angle profile decreases the joint resistance. Experimentally obtained joint resistance
was compared to the design values of resistance according to Technical Report 34 and EN 1992-
4, highlighting a considerable difference between the two analytical approaches. The comparison
between the “Dilat 08” and three types of free-movement joints available on the construction
market showed that “Dilat 08” features larger resistance according to Technical Report 34, but
it also weighs more.
PB  - University of Montenegro, Faculty of Civil Engineering
C3  - Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
T1  - Experimental investigation of the construction joint in concrete ground floors
EP  - 224
SP  - 217
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3469
ER  - 

@conference{
author = "Jakovljević, Isidora and Gluhović, Nina and Spremić, Milan and Rajnović, Dušan",
year = "2024",
abstract = "Ground floors of industrial buildings, fully supported on the ground or piles, are usually made
of several concrete segments connected through free-movement construction joints. These joints
should provide shear load transfer of the slab and minimise its vertical displacements while
allowing slab horizontal movement to prevent damage due to concrete dry shrinkage. The
construction joint “Dilat 08”, consisting of round steel dowels and steel formwork, was
experimentally tested in a laboratory environment to determine its behaviour to shear load. The
experimental double-shear setup consisted of three slabs connecting through the “Dilat 08” join
system, with two side slabs fully supported on the base and the middle slab on which the vertical
loading was applied. Specimens were formed with a gap of 10 mm between adjacent slabs to
simulate the construction joint opening. Two construction joint orientations were investigated
introducing the vertical load to the slab with a steel plate on the edge and to the slab with an
angle profile on the edge. Experimental testing of both specimens resulted in construction joint
failure due to concrete cracking around steel dowels, near the edges of the middle slab. The
investigation confirmed that the joint orientation affects the joint shear response, demonstrating
larger joint resistance when the steel plate is installed in the slab subjected to failure. Although
contributing to the joint bending stiffness before formwork installation on the site, the horizontal
leg of the angle profile decreases the joint resistance. Experimentally obtained joint resistance
was compared to the design values of resistance according to Technical Report 34 and EN 1992-
4, highlighting a considerable difference between the two analytical approaches. The comparison
between the “Dilat 08” and three types of free-movement joints available on the construction
market showed that “Dilat 08” features larger resistance according to Technical Report 34, but
it also weighs more.",
publisher = "University of Montenegro, Faculty of Civil Engineering",
journal = "Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024",
title = "Experimental investigation of the construction joint in concrete ground floors",
pages = "224-217",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3469"
}

Jakovljević, I., Gluhović, N., Spremić, M.,& Rajnović, D.. (2024). Experimental investigation of the construction joint in concrete ground floors. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
University of Montenegro, Faculty of Civil Engineering., 217-224.
https://hdl.handle.net/21.15107/rcub_grafar_3469

Jakovljević I, Gluhović N, Spremić M, Rajnović D. Experimental investigation of the construction joint in concrete ground floors. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024. 2024;:217-224.
https://hdl.handle.net/21.15107/rcub_grafar_3469 .

Jakovljević, Isidora, Gluhović, Nina, Spremić, Milan, Rajnović, Dušan, "Experimental investigation of the construction joint in concrete ground floors" in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024 (2024):217-224,
https://hdl.handle.net/21.15107/rcub_grafar_3469 .

TY  - CONF
AU  - Spremić, Milan
AU  - Dobrić, Jelena
AU  - Jakovljević, Isidora
AU  - Dinčić, Nemanja
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3468
AB  - When analysing the fire resistance of the steel structure of the stadium roof in the event of a fire,
the specific features of the stadium building must be taken into consideration. The stadium stands
are open units of the building that are directly connected to the surrounding area. The clear height
between the stadium roof and the stands is commonly large. However, the clear height between
relatively small parts of the roof, directly above the top of the stands, could be smaller, potentially
making this part of the roof the most vulnerable. On the stands of the stadium, it is prohibited to
bring items that contain combustible material. In addition, the structure of the stadium, benches
or chairs must be made of non-combustible material. Therefore, a fire that could compromise the
steel structure of the stadium roof can only come from the stadium premises on the stands or
under the stands. The fire scenarios on the stadium roof are not described in detail in the literature
compared to indoor (covered) sports arenas. To assess the fire resistance of the roof structure, it
is necessary to check all possible and potentially dangerous scenarios. The subject of the analysis
presented in this paper is the roof steel structure of the stadium in Loznica, Serbia, which was
built in the period 2021–2023. The study considers the following fire scenarios and their effects
on the roof steel structure: (i) a local fire on the stands, and (ii) a fire in the stadium premises
affecting the external members. The fire in stadium premises was analysed using the analytical
expressions provided in Annex B of EN 1991-1-2 and EN 1993-1-2, as well as through CFD
(Computational Fluid Dynamics) analysis of fire propagation. The calculation was performed
for the domains of temperature, time and resistance, depending on the applied fire load analysis.
Results showed that the steel structure of the stadium roof in Loznica meets the load-bearing
codified criteria for the fire effects, with the exception of only one main roof truss. To address
this issue, it was decided to install fire-resistant glass in the TV studio on the building's third
floor to separate this area from the stands and prevent fire effects on the critical main roof truss.
PB  - University of Montenegro Faculty of Civil Engineering
C3  - Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
T1  - Structural fire resistance design of the football stadium roof steel structure
EP  - 542
SP  - 535
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3468
ER  - 

@conference{
author = "Spremić, Milan and Dobrić, Jelena and Jakovljević, Isidora and Dinčić, Nemanja",
year = "2024",
abstract = "When analysing the fire resistance of the steel structure of the stadium roof in the event of a fire,
the specific features of the stadium building must be taken into consideration. The stadium stands
are open units of the building that are directly connected to the surrounding area. The clear height
between the stadium roof and the stands is commonly large. However, the clear height between
relatively small parts of the roof, directly above the top of the stands, could be smaller, potentially
making this part of the roof the most vulnerable. On the stands of the stadium, it is prohibited to
bring items that contain combustible material. In addition, the structure of the stadium, benches
or chairs must be made of non-combustible material. Therefore, a fire that could compromise the
steel structure of the stadium roof can only come from the stadium premises on the stands or
under the stands. The fire scenarios on the stadium roof are not described in detail in the literature
compared to indoor (covered) sports arenas. To assess the fire resistance of the roof structure, it
is necessary to check all possible and potentially dangerous scenarios. The subject of the analysis
presented in this paper is the roof steel structure of the stadium in Loznica, Serbia, which was
built in the period 2021–2023. The study considers the following fire scenarios and their effects
on the roof steel structure: (i) a local fire on the stands, and (ii) a fire in the stadium premises
affecting the external members. The fire in stadium premises was analysed using the analytical
expressions provided in Annex B of EN 1991-1-2 and EN 1993-1-2, as well as through CFD
(Computational Fluid Dynamics) analysis of fire propagation. The calculation was performed
for the domains of temperature, time and resistance, depending on the applied fire load analysis.
Results showed that the steel structure of the stadium roof in Loznica meets the load-bearing
codified criteria for the fire effects, with the exception of only one main roof truss. To address
this issue, it was decided to install fire-resistant glass in the TV studio on the building's third
floor to separate this area from the stands and prevent fire effects on the critical main roof truss.",
publisher = "University of Montenegro Faculty of Civil Engineering",
journal = "Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024",
title = "Structural fire resistance design of the football stadium roof steel structure",
pages = "542-535",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3468"
}

Spremić, M., Dobrić, J., Jakovljević, I.,& Dinčić, N.. (2024). Structural fire resistance design of the football stadium roof steel structure. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024
University of Montenegro Faculty of Civil Engineering., 535-542.
https://hdl.handle.net/21.15107/rcub_grafar_3468

Spremić M, Dobrić J, Jakovljević I, Dinčić N. Structural fire resistance design of the football stadium roof steel structure. in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024. 2024;:535-542.
https://hdl.handle.net/21.15107/rcub_grafar_3468 .

Spremić, Milan, Dobrić, Jelena, Jakovljević, Isidora, Dinčić, Nemanja, "Structural fire resistance design of the football stadium roof steel structure" in Proceedings of The 9th International Conference "Civil Engineering – Science and Practice", Kolašin, 5-9th March 2024 (2024):535-542,
https://hdl.handle.net/21.15107/rcub_grafar_3468 .

TY  - CONF
AU  - Mijatović, Ognjen
AU  - Mišković, Zoran
AU  - Salatić, Ratko
AU  - Golubović - Bugarski, Valentina
AU  - Guzijan - Dilber, Matija
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3470
AB  - Driven by the industry's needs to address energy dissipation issues in mechanical connections,
the set goals of the global scientific community, and previous research efforts to interpret how
the condition of contact surfaces between two bodies in contact can be significant, a unique
experimental setup has been devised to study the impact of the state of contact interaction
between two bodies on the system's response. The purpose of the designed experimental setup
is to correlate the roughness of contact surfaces with the deformation of a specially designed
experimental sample. The roughness of contact surfaces represents the most dominant
influencing factor in the contact interaction of two bodies. In terms of scale, the study,
measurement, and analysis of surface roughness fall under the micro and nano scales. On the
other hand, the change in deformation of the experimental sample as a result of the change in
roughness falls under the macro scale. Based on all the aforementioned, the fundamental idea of
the designed experimental setup can be seen. Considering that it is not possible to enter into
contact interaction and explicitly analyse the influence of roughness on the response of a
mechanical connection, the idea in overall research is to consider the macro behaviour of a
specially prepared experimental sample depending on the level of roughness of the contact
interaction surfaces at the micro level. The aim of this paper is to present details and challenges
in the construction of an instrument necessary for such precise examinations, named “Precision
Press with Arcs”.
PB  - University of Montenegro Faculty of Civil Engineering
C3  - The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
T1  - Development of a tool for measuring the effect of surface roughness on steel structural response
EP  - 256
SP  - 249
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3470
ER  - 

@conference{
author = "Mijatović, Ognjen and Mišković, Zoran and Salatić, Ratko and Golubović - Bugarski, Valentina and Guzijan - Dilber, Matija",
year = "2024",
abstract = "Driven by the industry's needs to address energy dissipation issues in mechanical connections,
the set goals of the global scientific community, and previous research efforts to interpret how
the condition of contact surfaces between two bodies in contact can be significant, a unique
experimental setup has been devised to study the impact of the state of contact interaction
between two bodies on the system's response. The purpose of the designed experimental setup
is to correlate the roughness of contact surfaces with the deformation of a specially designed
experimental sample. The roughness of contact surfaces represents the most dominant
influencing factor in the contact interaction of two bodies. In terms of scale, the study,
measurement, and analysis of surface roughness fall under the micro and nano scales. On the
other hand, the change in deformation of the experimental sample as a result of the change in
roughness falls under the macro scale. Based on all the aforementioned, the fundamental idea of
the designed experimental setup can be seen. Considering that it is not possible to enter into
contact interaction and explicitly analyse the influence of roughness on the response of a
mechanical connection, the idea in overall research is to consider the macro behaviour of a
specially prepared experimental sample depending on the level of roughness of the contact
interaction surfaces at the micro level. The aim of this paper is to present details and challenges
in the construction of an instrument necessary for such precise examinations, named “Precision
Press with Arcs”.",
publisher = "University of Montenegro Faculty of Civil Engineering",
journal = "The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024",
title = "Development of a tool for measuring the effect of surface roughness on steel structural response",
pages = "256-249",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3470"
}

Mijatović, O., Mišković, Z., Salatić, R., Golubović - Bugarski, V.,& Guzijan - Dilber, M.. (2024). Development of a tool for measuring the effect of surface roughness on steel structural response. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
University of Montenegro Faculty of Civil Engineering., 249-256.
https://hdl.handle.net/21.15107/rcub_grafar_3470

Mijatović O, Mišković Z, Salatić R, Golubović - Bugarski V, Guzijan - Dilber M. Development of a tool for measuring the effect of surface roughness on steel structural response. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024. 2024;:249-256.
https://hdl.handle.net/21.15107/rcub_grafar_3470 .

Mijatović, Ognjen, Mišković, Zoran, Salatić, Ratko, Golubović - Bugarski, Valentina, Guzijan - Dilber, Matija, "Development of a tool for measuring the effect of surface roughness on steel structural response" in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024 (2024):249-256,
https://hdl.handle.net/21.15107/rcub_grafar_3470 .

TY  - CONF
AU  - Savatović, Siniša
AU  - Mišković, Zoran
AU  - Salatić, Ratko
AU  - Latinović-Krndija, Marina
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3466
AB  - The paper presents an experimental and analytical way of determining the impulse response of
a linear time-invariant damped system with one degree of freedom.
An experiment was conducted where the mass was excited by an impact load. Both the mass
acceleration and impact force values were recorded. The magnitude of the system's frequency
response was determined based on the recorded values, ensuring the relatively simple
identification of the system's basic parameters. Those parameters were used to define a suitable
mathematical model of the system, transfer function, and frequency response function in an
analytical form.
The impulse response of the system based on the recorded values of mass acceleration and impact
load is expressed as a discrete function. This function is determined by applying the inverse
discrete Fourier transform of the corresponding frequency response function.
The impulse response of the system, based on the mathematical model, is expressed as a
continuous function. This function is determined by applying the inverse Fourier transform of
the corresponding frequency response.
Finally, it was shown that the response of a system to arbitrary load could be determined by
convolving the impulse response of the system with the load function. Convolution of continuous
functions is difficult to perform, and it can be used only for the simplest problem and for
understanding the physical phenomenon. Discrete convolution has a practical utility because it
is easy to perform in some program languages like Matlab. However, discrete impulse response
has limitations depending on the test conditions.
PB  - University of Montenegro Faculty of Civil Engineering
C3  - The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
T1  - Analytic and experimental determination impulse response of single degree of freedom system
EP  - 288
SP  - 281
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3466
ER  - 

@conference{
author = "Savatović, Siniša and Mišković, Zoran and Salatić, Ratko and Latinović-Krndija, Marina",
year = "2024",
abstract = "The paper presents an experimental and analytical way of determining the impulse response of
a linear time-invariant damped system with one degree of freedom.
An experiment was conducted where the mass was excited by an impact load. Both the mass
acceleration and impact force values were recorded. The magnitude of the system's frequency
response was determined based on the recorded values, ensuring the relatively simple
identification of the system's basic parameters. Those parameters were used to define a suitable
mathematical model of the system, transfer function, and frequency response function in an
analytical form.
The impulse response of the system based on the recorded values of mass acceleration and impact
load is expressed as a discrete function. This function is determined by applying the inverse
discrete Fourier transform of the corresponding frequency response function.
The impulse response of the system, based on the mathematical model, is expressed as a
continuous function. This function is determined by applying the inverse Fourier transform of
the corresponding frequency response.
Finally, it was shown that the response of a system to arbitrary load could be determined by
convolving the impulse response of the system with the load function. Convolution of continuous
functions is difficult to perform, and it can be used only for the simplest problem and for
understanding the physical phenomenon. Discrete convolution has a practical utility because it
is easy to perform in some program languages like Matlab. However, discrete impulse response
has limitations depending on the test conditions.",
publisher = "University of Montenegro Faculty of Civil Engineering",
journal = "The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024",
title = "Analytic and experimental determination impulse response of single degree of freedom system",
pages = "288-281",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3466"
}

Savatović, S., Mišković, Z., Salatić, R.,& Latinović-Krndija, M.. (2024). Analytic and experimental determination impulse response of single degree of freedom system. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
University of Montenegro Faculty of Civil Engineering., 281-288.
https://hdl.handle.net/21.15107/rcub_grafar_3466

Savatović S, Mišković Z, Salatić R, Latinović-Krndija M. Analytic and experimental determination impulse response of single degree of freedom system. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024. 2024;:281-288.
https://hdl.handle.net/21.15107/rcub_grafar_3466 .

Savatović, Siniša, Mišković, Zoran, Salatić, Ratko, Latinović-Krndija, Marina, "Analytic and experimental determination impulse response of single degree of freedom system" in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024 (2024):281-288,
https://hdl.handle.net/21.15107/rcub_grafar_3466 .

TY  - CONF
AU  - Mišković, Zoran
AU  - Savatović, Siniša
AU  - Mišković, Ljiljana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3467
AB  - The paper presents part of the conducted research on laser-displacement sensors for the
measurement of structural response in civil engineering applications. Usually, the level of
displacement in laboratory or on-site testing is in small to mid-range levels of 1.00 to 25.00 mm
and in the frequency range of up to 100 Hz. Appropriate sensors were selected and used
according to performance in the sense of resolution/accuracy.
Experiments are conducted on steel model beam in the laboratory and on-site real bridge
structure. In both analysed cases, data analysis was carried out in the sense of modal frequencies
and damping estimation with comparison with numerically computed values.
Presented are the results of two experiments, a laboratory-tested model of steel beam and an onsite
tested real bridge structure. In both cases have achieved good argument of test results,
estimated modal frequencies and damping of tested model/structure.
Data analyses conducted used a developed MATLAB script, while the numerical computation
conducted used SAP2000_v14 FEM package for structural analysis.
Excellent agreement of extracted results was achieved in the case of the laboratory-tested
structural model, as well as of extracted results of on-site tested real-world structure in the sense
of extracted modal frequencies and modal damping.
Finally, the conclusion is that laser-displacement sensors are quite appropriate for small to midrange
of expected displacement and are quite appropriate for such applications according to the
possibility of installation so that such sensors could be applied for structural testing, particularly
for dynamic testing of such structures because of their possibility of high sampling frequency
and high resolution/accuracy.
PB  - University of Montenegro Faculty of Civil Engineering
C3  - The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
T1  - Direct laser dynamic displacement measurement of structural response during testing
EP  - 264
SP  - 257
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3467
ER  - 

@conference{
author = "Mišković, Zoran and Savatović, Siniša and Mišković, Ljiljana",
year = "2024",
abstract = "The paper presents part of the conducted research on laser-displacement sensors for the
measurement of structural response in civil engineering applications. Usually, the level of
displacement in laboratory or on-site testing is in small to mid-range levels of 1.00 to 25.00 mm
and in the frequency range of up to 100 Hz. Appropriate sensors were selected and used
according to performance in the sense of resolution/accuracy.
Experiments are conducted on steel model beam in the laboratory and on-site real bridge
structure. In both analysed cases, data analysis was carried out in the sense of modal frequencies
and damping estimation with comparison with numerically computed values.
Presented are the results of two experiments, a laboratory-tested model of steel beam and an onsite
tested real bridge structure. In both cases have achieved good argument of test results,
estimated modal frequencies and damping of tested model/structure.
Data analyses conducted used a developed MATLAB script, while the numerical computation
conducted used SAP2000_v14 FEM package for structural analysis.
Excellent agreement of extracted results was achieved in the case of the laboratory-tested
structural model, as well as of extracted results of on-site tested real-world structure in the sense
of extracted modal frequencies and modal damping.
Finally, the conclusion is that laser-displacement sensors are quite appropriate for small to midrange
of expected displacement and are quite appropriate for such applications according to the
possibility of installation so that such sensors could be applied for structural testing, particularly
for dynamic testing of such structures because of their possibility of high sampling frequency
and high resolution/accuracy.",
publisher = "University of Montenegro Faculty of Civil Engineering",
journal = "The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024",
title = "Direct laser dynamic displacement measurement of structural response during testing",
pages = "264-257",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3467"
}

Mišković, Z., Savatović, S.,& Mišković, L.. (2024). Direct laser dynamic displacement measurement of structural response during testing. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024
University of Montenegro Faculty of Civil Engineering., 257-264.
https://hdl.handle.net/21.15107/rcub_grafar_3467

Mišković Z, Savatović S, Mišković L. Direct laser dynamic displacement measurement of structural response during testing. in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024. 2024;:257-264.
https://hdl.handle.net/21.15107/rcub_grafar_3467 .

Mišković, Zoran, Savatović, Siniša, Mišković, Ljiljana, "Direct laser dynamic displacement measurement of structural response during testing" in The ninth international conference civil engineering science & practice, GNP 2024 proceedings, Kolašin, 5-9 March, 2024 (2024):257-264,
https://hdl.handle.net/21.15107/rcub_grafar_3467 .

TY  - JOUR
AU  - Todorović, Andrijana
AU  - Grabs, Thomas
AU  - Teutschbein, Claudia
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3463
AB  - Multi-model combination (averaging) methods (MMCMs) are used to improve the accuracy of hydrological (precipitation-runoff) outputs in simulation or forecasting/prediction modes. In this paper, we examined if the application of MMCMs can improve model performance in reproducing distributions of hydrological signatures, such as annual maxima or minima of varying durations. To this end, ten MMCMs were applied to 29 bucket-type models to simulate runoff in 50 high-latitude catchments. The MMCMs were evaluated by comparing the resulting simulated flows to the reference (i.e., best-performing) individual model, considering various commonly used performance indicators, as well as model performance in reproducing the distributions of signatures. Additionally, we analysed whether (1) the selection of the candidate models, or (2) targeting specific signatures, such as annual maxima or minima, can improve performance of the model combinations. The results suggest that the application of MMCMs can improve accuracy of runoff simulations in terms of traditional performance indicators, but fails to improve performance in reproducing the distributions of signatures. Neither excluding poor-performing models nor applying the MMCMs with the targeted signatures, improves this aspect of model performance. These findings clearly reveal the need for further research aiming at enhancing model performance in reproducing the distributions of hydrological signatures, which is essential for climate-change impact studies.
PB  - Elsevier
T2  - Journal of Hydrology
T1  - Improving performance of bucket-type hydrological models in high latitudes with multi-model combination methods: Can we wring water from a stone?
SP  - 130829
DO  - 10.1016/j.jhydrol.2024.130829
ER  - 

@article{
author = "Todorović, Andrijana and Grabs, Thomas and Teutschbein, Claudia",
year = "2024",
abstract = "Multi-model combination (averaging) methods (MMCMs) are used to improve the accuracy of hydrological (precipitation-runoff) outputs in simulation or forecasting/prediction modes. In this paper, we examined if the application of MMCMs can improve model performance in reproducing distributions of hydrological signatures, such as annual maxima or minima of varying durations. To this end, ten MMCMs were applied to 29 bucket-type models to simulate runoff in 50 high-latitude catchments. The MMCMs were evaluated by comparing the resulting simulated flows to the reference (i.e., best-performing) individual model, considering various commonly used performance indicators, as well as model performance in reproducing the distributions of signatures. Additionally, we analysed whether (1) the selection of the candidate models, or (2) targeting specific signatures, such as annual maxima or minima, can improve performance of the model combinations. The results suggest that the application of MMCMs can improve accuracy of runoff simulations in terms of traditional performance indicators, but fails to improve performance in reproducing the distributions of signatures. Neither excluding poor-performing models nor applying the MMCMs with the targeted signatures, improves this aspect of model performance. These findings clearly reveal the need for further research aiming at enhancing model performance in reproducing the distributions of hydrological signatures, which is essential for climate-change impact studies.",
publisher = "Elsevier",
journal = "Journal of Hydrology",
title = "Improving performance of bucket-type hydrological models in high latitudes with multi-model combination methods: Can we wring water from a stone?",
pages = "130829",
doi = "10.1016/j.jhydrol.2024.130829"
}

Todorović, A., Grabs, T.,& Teutschbein, C.. (2024). Improving performance of bucket-type hydrological models in high latitudes with multi-model combination methods: Can we wring water from a stone?. in Journal of Hydrology
Elsevier., 130829.
https://doi.org/10.1016/j.jhydrol.2024.130829

Todorović A, Grabs T, Teutschbein C. Improving performance of bucket-type hydrological models in high latitudes with multi-model combination methods: Can we wring water from a stone?. in Journal of Hydrology. 2024;:130829.
doi:10.1016/j.jhydrol.2024.130829 .

Todorović, Andrijana, Grabs, Thomas, Teutschbein, Claudia, "Improving performance of bucket-type hydrological models in high latitudes with multi-model combination methods: Can we wring water from a stone?" in Journal of Hydrology (2024):130829,
https://doi.org/10.1016/j.jhydrol.2024.130829 . .

TY  - JOUR
AU  - Radović, Andrija
AU  - Carević, Vedran
AU  - Marinković, Snežana
AU  - Plavšić, Jasna
AU  - Tešić, Ksenija
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3461
AB  - The efficient way to mitigate the impact of the concrete industry on climate change is to reduce the clinker content in the concrete mix. Beside incorporating supplementary cementitious materials (SCMs), it is possible to use high filler content combined with concrete mix optimisation. Limestone powder emerges as a promising filler mineral due to its availability and ready-to-use technology. In this work, the carbonation resistance of concrete with a high limestone powder content (45–65% of the powder phase) was experimentally tested. Test results showed that, with an optimized mix design featuring low water content and increased paste and plasticizer volume, concrete mixes satisfied high workability and strength demands for commonly applied strength classes. However, carbonation resistance remains a challenge. After two years in indoor natural conditions, carbonation depths were 8%, 28%, and 67% greater than referent Portland cement concrete for mixes with 47%, 58%, and 65% limestone powder content, respectively. Further analyses showed the inapplicability of the existing fib Model Code 2010 service life prediction model to limestone powder concrete. Based on a comprehensive database of experimental results, the modification of the fib prediction was proposed. A full probabilistic service life analysis revealed that for concrete with more than 20% limestone powder content and for both 50 and 100-years’ design service life, the currently prescribed concrete cover depths in European standards should be increased, depending on the carbonation exposure class.
PB  - Elsevier Ltd
T2  - Journal of Building Engineering
T1  - Prediction model for calculation of the limestone powder concrete carbonation depth
SP  - 108776
DO  - 10.1016/j.jobe.2024.108776
ER  - 

@article{
author = "Radović, Andrija and Carević, Vedran and Marinković, Snežana and Plavšić, Jasna and Tešić, Ksenija",
year = "2024",
abstract = "The efficient way to mitigate the impact of the concrete industry on climate change is to reduce the clinker content in the concrete mix. Beside incorporating supplementary cementitious materials (SCMs), it is possible to use high filler content combined with concrete mix optimisation. Limestone powder emerges as a promising filler mineral due to its availability and ready-to-use technology. In this work, the carbonation resistance of concrete with a high limestone powder content (45–65% of the powder phase) was experimentally tested. Test results showed that, with an optimized mix design featuring low water content and increased paste and plasticizer volume, concrete mixes satisfied high workability and strength demands for commonly applied strength classes. However, carbonation resistance remains a challenge. After two years in indoor natural conditions, carbonation depths were 8%, 28%, and 67% greater than referent Portland cement concrete for mixes with 47%, 58%, and 65% limestone powder content, respectively. Further analyses showed the inapplicability of the existing fib Model Code 2010 service life prediction model to limestone powder concrete. Based on a comprehensive database of experimental results, the modification of the fib prediction was proposed. A full probabilistic service life analysis revealed that for concrete with more than 20% limestone powder content and for both 50 and 100-years’ design service life, the currently prescribed concrete cover depths in European standards should be increased, depending on the carbonation exposure class.",
publisher = "Elsevier Ltd",
journal = "Journal of Building Engineering",
title = "Prediction model for calculation of the limestone powder concrete carbonation depth",
pages = "108776",
doi = "10.1016/j.jobe.2024.108776"
}

Radović, A., Carević, V., Marinković, S., Plavšić, J.,& Tešić, K.. (2024). Prediction model for calculation of the limestone powder concrete carbonation depth. in Journal of Building Engineering
Elsevier Ltd., 108776.
https://doi.org/10.1016/j.jobe.2024.108776

Radović A, Carević V, Marinković S, Plavšić J, Tešić K. Prediction model for calculation of the limestone powder concrete carbonation depth. in Journal of Building Engineering. 2024;:108776.
doi:10.1016/j.jobe.2024.108776 .

Radović, Andrija, Carević, Vedran, Marinković, Snežana, Plavšić, Jasna, Tešić, Ksenija, "Prediction model for calculation of the limestone powder concrete carbonation depth" in Journal of Building Engineering (2024):108776,
https://doi.org/10.1016/j.jobe.2024.108776 . .

TY  - JOUR
AU  - Orešković, Marko
AU  - Bohuš, Štepan
AU  - Virgili, Amadeo
AU  - Canestrari, Francesco
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3462
AB  - Fatigue analysis has an important role in evaluating the durability and performance of asphalt pavements, especially when novel or alternative materials are used. Numerous laboratory studies have investigated fatigue performance with the aim of estimating field behavior as accurately as feasible. Therefore, there are currently many different test methods and data analysis approaches that can be used. One of the most common laboratory test methods is the four-point bending beam (4PBB) test, which results are usually analyzed using the so-called traditional (where 50% reduction in initial stiffness is considered as failure criterion) or the energy ratio (ER) approach. However, outcomes from previous studies have shown that these approaches may not be appropriate and reliable if geogrids are used as a reinforcement. As a possible solution, this study proposes a new simplified flex point (SFP) approach that considers the flex point of the strain amplitude curve, measured during 4PBB fatigue tests, to calculate the number of cycles to failure. These three approaches were applied to four double-layered asphalt sets: one unreinforced and three reinforced with geogrids of different strength (50 x 50, 100 x 100 and 100 x 200 kN/m). The impact of reinforcement on the fatigue life was evaluated by comparing the critical strain values (ε6) of reinforced and unreinforced sets through the fatigue resistance improvement factor. The research findings showed that the use of geogrids improves fatigue life when the SFP and ER approaches are applied and that the traditional approach might not always be appropriate for assessing the fatigue resistance of reinforced asphalt mixtures.
PB  - Springer
T2  - Materials and Structures
T1  - Simplified methodology for fatigue analysis of reinforced asphalt systems
IS  - 34
VL  - 57
DO  - 10.1617/s11527-024-02305-1
ER  - 

@article{
author = "Orešković, Marko and Bohuš, Štepan and Virgili, Amadeo and Canestrari, Francesco",
year = "2024",
abstract = "Fatigue analysis has an important role in evaluating the durability and performance of asphalt pavements, especially when novel or alternative materials are used. Numerous laboratory studies have investigated fatigue performance with the aim of estimating field behavior as accurately as feasible. Therefore, there are currently many different test methods and data analysis approaches that can be used. One of the most common laboratory test methods is the four-point bending beam (4PBB) test, which results are usually analyzed using the so-called traditional (where 50% reduction in initial stiffness is considered as failure criterion) or the energy ratio (ER) approach. However, outcomes from previous studies have shown that these approaches may not be appropriate and reliable if geogrids are used as a reinforcement. As a possible solution, this study proposes a new simplified flex point (SFP) approach that considers the flex point of the strain amplitude curve, measured during 4PBB fatigue tests, to calculate the number of cycles to failure. These three approaches were applied to four double-layered asphalt sets: one unreinforced and three reinforced with geogrids of different strength (50 x 50, 100 x 100 and 100 x 200 kN/m). The impact of reinforcement on the fatigue life was evaluated by comparing the critical strain values (ε6) of reinforced and unreinforced sets through the fatigue resistance improvement factor. The research findings showed that the use of geogrids improves fatigue life when the SFP and ER approaches are applied and that the traditional approach might not always be appropriate for assessing the fatigue resistance of reinforced asphalt mixtures.",
publisher = "Springer",
journal = "Materials and Structures",
title = "Simplified methodology for fatigue analysis of reinforced asphalt systems",
number = "34",
volume = "57",
doi = "10.1617/s11527-024-02305-1"
}

Orešković, M., Bohuš, Š., Virgili, A.,& Canestrari, F.. (2024). Simplified methodology for fatigue analysis of reinforced asphalt systems. in Materials and Structures
Springer., 57(34).
https://doi.org/10.1617/s11527-024-02305-1

Orešković M, Bohuš Š, Virgili A, Canestrari F. Simplified methodology for fatigue analysis of reinforced asphalt systems. in Materials and Structures. 2024;57(34).
doi:10.1617/s11527-024-02305-1 .

Orešković, Marko, Bohuš, Štepan, Virgili, Amadeo, Canestrari, Francesco, "Simplified methodology for fatigue analysis of reinforced asphalt systems" in Materials and Structures, 57, no. 34 (2024),
https://doi.org/10.1617/s11527-024-02305-1 . .

TY  - JOUR
AU  - Jakovljević, Isidora
AU  - Spremić, Milan
AU  - Marković, Zlatko
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3459
AB  - Headed stud shear connectors are commonly implemented in steel-concrete composite floors for connecting the concrete slab to the steel beam and providing composite action between those two elements. The orientation of profiled sheeting is usually transverse or parallel to the supporting beam, and for those cases, design codes provide specific detailing requests and relations for obtaining headed stud resistance. Nevertheless, design codes do not recognise specific configurations when the angle between profiled sheeting ribs and the beam is in the range between 0° and 90°, which is characteristic of irregular-shaped floor structures. Due to the lack of design recommendations for headed stud resistance in these cases, investigations of the effect of the rib-to-beam angle on headed stud shear performance were conducted and presented in this paper. Experimental work included push-out tests conducted on specimens with rib-to-beam angles of 45° and 60°, as well as control specimens with ribs transverse to the beam. The influence of varied rib-to-beam angles on shear connector properties such as shear resistance, stiffness, ductility, and failure mode was discussed. According to experimental research, finite element models of push-out tests were created and verified. The parametric numerical analysis covered key parameters such as concrete class, headed stud height and diameter, and rib-to-beam angle. According to the results, an analytical relation for obtaining headed stud resistance in profiled steel sheeting with a rib-to-beam angle between 30° and 90° was proposed.
PB  - Elsevier
T2  - Engineering Structures
T1  - Effect of rib-to-beam angle on the shear resistance of headed studs in composite slab
SP  - 117574
VL  - 303
DO  - 10.1016/j.engstruct.2024.117574
ER  - 

@article{
author = "Jakovljević, Isidora and Spremić, Milan and Marković, Zlatko",
year = "2024",
abstract = "Headed stud shear connectors are commonly implemented in steel-concrete composite floors for connecting the concrete slab to the steel beam and providing composite action between those two elements. The orientation of profiled sheeting is usually transverse or parallel to the supporting beam, and for those cases, design codes provide specific detailing requests and relations for obtaining headed stud resistance. Nevertheless, design codes do not recognise specific configurations when the angle between profiled sheeting ribs and the beam is in the range between 0° and 90°, which is characteristic of irregular-shaped floor structures. Due to the lack of design recommendations for headed stud resistance in these cases, investigations of the effect of the rib-to-beam angle on headed stud shear performance were conducted and presented in this paper. Experimental work included push-out tests conducted on specimens with rib-to-beam angles of 45° and 60°, as well as control specimens with ribs transverse to the beam. The influence of varied rib-to-beam angles on shear connector properties such as shear resistance, stiffness, ductility, and failure mode was discussed. According to experimental research, finite element models of push-out tests were created and verified. The parametric numerical analysis covered key parameters such as concrete class, headed stud height and diameter, and rib-to-beam angle. According to the results, an analytical relation for obtaining headed stud resistance in profiled steel sheeting with a rib-to-beam angle between 30° and 90° was proposed.",
publisher = "Elsevier",
journal = "Engineering Structures",
title = "Effect of rib-to-beam angle on the shear resistance of headed studs in composite slab",
pages = "117574",
volume = "303",
doi = "10.1016/j.engstruct.2024.117574"
}

Jakovljević, I., Spremić, M.,& Marković, Z.. (2024). Effect of rib-to-beam angle on the shear resistance of headed studs in composite slab. in Engineering Structures
Elsevier., 303, 117574.
https://doi.org/10.1016/j.engstruct.2024.117574

Jakovljević I, Spremić M, Marković Z. Effect of rib-to-beam angle on the shear resistance of headed studs in composite slab. in Engineering Structures. 2024;303:117574.
doi:10.1016/j.engstruct.2024.117574 .

Jakovljević, Isidora, Spremić, Milan, Marković, Zlatko, "Effect of rib-to-beam angle on the shear resistance of headed studs in composite slab" in Engineering Structures, 303 (2024):117574,
https://doi.org/10.1016/j.engstruct.2024.117574 . .