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  - Mirković, Nikola
AU  - Nefovska-Danilović, Marija
AU  - Ahac, Maja
AU  - Lakušić, Stjepan
AU  - Mirković, Uroš
AU  - Zafirovski, Zlatko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3162
AB  - Additional temperature stresses in continuously welded rails (CWRs) are caused by track/bridge interaction (TBI) due to thermal actions. Exceeding permissible stresses in CWRs on the bridge can lead to track buckling or rail cracking, compromising the safety of railway traffic. The main aim of the conducted study is to determine the effects of the key parameters such as rail cross-sectional area, track longitudinal resistance, bridge expansion length, and longitudinal stiffness of the fixed bridge support on the reduction of additional temperature stresses in CWRs on steel truss railway bridges. To quantify the effects of these parameters, two steel railway bridges with CWRs and the maximum expansion lengths according to UIC Code 774-3 were analyzed: (1) simply supported truss bridge with expansion length of 60 m and (2) continuous truss bridge with expansion lengths of 2 × 60 m. According to the obtained results, the track longitudinal resistance had the most significant impact on additional temperature stresses in CWRs, leading to their reduction of up to 72%. The bridge expansion length and the rail cross-sectional area led to reductions of up to 25% and up to 18%, respectively. Considering the deformation criteria of TBI, the longitudinal stiffness of the fixed bridge support had a minor effect on the reduction of additional temperature stresses in CWRs.
PB  - MDPI (Basel, Switzerland)
T2  - Buildings
T1  - Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges
IS  - 9: 2296
VL  - 13
DO  - 10.3390/buildings13092296
ER  - 

@article{
author = "Mirković, Nikola and Nefovska-Danilović, Marija and Ahac, Maja and Lakušić, Stjepan and Mirković, Uroš and Zafirovski, Zlatko",
year = "2023",
abstract = "Additional temperature stresses in continuously welded rails (CWRs) are caused by track/bridge interaction (TBI) due to thermal actions. Exceeding permissible stresses in CWRs on the bridge can lead to track buckling or rail cracking, compromising the safety of railway traffic. The main aim of the conducted study is to determine the effects of the key parameters such as rail cross-sectional area, track longitudinal resistance, bridge expansion length, and longitudinal stiffness of the fixed bridge support on the reduction of additional temperature stresses in CWRs on steel truss railway bridges. To quantify the effects of these parameters, two steel railway bridges with CWRs and the maximum expansion lengths according to UIC Code 774-3 were analyzed: (1) simply supported truss bridge with expansion length of 60 m and (2) continuous truss bridge with expansion lengths of 2 × 60 m. According to the obtained results, the track longitudinal resistance had the most significant impact on additional temperature stresses in CWRs, leading to their reduction of up to 72%. The bridge expansion length and the rail cross-sectional area led to reductions of up to 25% and up to 18%, respectively. Considering the deformation criteria of TBI, the longitudinal stiffness of the fixed bridge support had a minor effect on the reduction of additional temperature stresses in CWRs.",
publisher = "MDPI (Basel, Switzerland)",
journal = "Buildings",
title = "Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges",
number = "9: 2296",
volume = "13",
doi = "10.3390/buildings13092296"
}

Mirković, N., Nefovska-Danilović, M., Ahac, M., Lakušić, S., Mirković, U.,& Zafirovski, Z.. (2023). Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges. in Buildings
MDPI (Basel, Switzerland)., 13(9: 2296).
https://doi.org/10.3390/buildings13092296

Mirković N, Nefovska-Danilović M, Ahac M, Lakušić S, Mirković U, Zafirovski Z. Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges. in Buildings. 2023;13(9: 2296).
doi:10.3390/buildings13092296 .

Mirković, Nikola, Nefovska-Danilović, Marija, Ahac, Maja, Lakušić, Stjepan, Mirković, Uroš, Zafirovski, Zlatko, "Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges" in Buildings, 13, no. 9: 2296 (2023),
https://doi.org/10.3390/buildings13092296 . .

TY  - CONF
AU  - Mirković, Uroš
AU  - Kuzmanović, Vladan
AU  - Todorović, Goran
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3056
AB  - Rezime:
Termičko ponašanje gravitacionih betonskih brana presudno zavisi od početnih i graničnih uslova, karakteristika mešavine i dimenzija blokova. U radu je prikazan prostorni numerički model za faznu tеrmičku analizu visoke gravitacionе bеtonskе branе. Za usvojеnе dimеnzijе blokova, rеdoslеd bеtoniranja i dinamiku građеnja određivano je tеmpеraturno poljе, uzimajući u obzir toplotu hidratacije betona i sadеjstvujuću stеnsku masu. Na osnovu dobijenih rezultata, dati su zaključci i preporuke za proračun temperaturnog polja kod gravitacionih betonskih brana.
AB  - Summary:
The thermal behavior of concrete gravity dams crucially depends on the initial and boundary conditions, the characteristics of the mixture and the dimensions of the blocks. This paper presents numerical model for transient thermal analysis of a high concrete gravity dam. The temperature field was determined for the predefined dimensions of the blocks and placement schedule, taking into account hydration heat and the surrounding rock mass. Based on the obtained results, conclusions and recommendations for concrete gravity dams thermal analysis are given.
C3  - Zbornik radova sa Simpozijuma DGKS, Aranđelovac, 2020.
T1  - Termička analiza gravitacione betonske brane u fazi izgradnje i eksploatacije
EP  - 425
SP  - 416
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3056
ER  - 

@conference{
author = "Mirković, Uroš and Kuzmanović, Vladan and Todorović, Goran",
year = "2021",
abstract = "Rezime:
Termičko ponašanje gravitacionih betonskih brana presudno zavisi od početnih i graničnih uslova, karakteristika mešavine i dimenzija blokova. U radu je prikazan prostorni numerički model za faznu tеrmičku analizu visoke gravitacionе bеtonskе branе. Za usvojеnе dimеnzijе blokova, rеdoslеd bеtoniranja i dinamiku građеnja određivano je tеmpеraturno poljе, uzimajući u obzir toplotu hidratacije betona i sadеjstvujuću stеnsku masu. Na osnovu dobijenih rezultata, dati su zaključci i preporuke za proračun temperaturnog polja kod gravitacionih betonskih brana., Summary:
The thermal behavior of concrete gravity dams crucially depends on the initial and boundary conditions, the characteristics of the mixture and the dimensions of the blocks. This paper presents numerical model for transient thermal analysis of a high concrete gravity dam. The temperature field was determined for the predefined dimensions of the blocks and placement schedule, taking into account hydration heat and the surrounding rock mass. Based on the obtained results, conclusions and recommendations for concrete gravity dams thermal analysis are given.",
journal = "Zbornik radova sa Simpozijuma DGKS, Aranđelovac, 2020.",
title = "Termička analiza gravitacione betonske brane u fazi izgradnje i eksploatacije",
pages = "425-416",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3056"
}

Mirković, U., Kuzmanović, V.,& Todorović, G.. (2021). Termička analiza gravitacione betonske brane u fazi izgradnje i eksploatacije. in Zbornik radova sa Simpozijuma DGKS, Aranđelovac, 2020., 416-425.
https://hdl.handle.net/21.15107/rcub_grafar_3056

Mirković U, Kuzmanović V, Todorović G. Termička analiza gravitacione betonske brane u fazi izgradnje i eksploatacije. in Zbornik radova sa Simpozijuma DGKS, Aranđelovac, 2020.. 2021;:416-425.
https://hdl.handle.net/21.15107/rcub_grafar_3056 .

Mirković, Uroš, Kuzmanović, Vladan, Todorović, Goran, "Termička analiza gravitacione betonske brane u fazi izgradnje i eksploatacije" in Zbornik radova sa Simpozijuma DGKS, Aranđelovac, 2020. (2021):416-425,
https://hdl.handle.net/21.15107/rcub_grafar_3056 .

TY  - CONF
AU  - Mirković, Uroš
AU  - Ivanović, Jovana
AU  - Pavić, Maja
AU  - Radovanović, Slobodan
AU  - Mirković, Nikola
AU  - Gospavić, Radovan
AU  - Todorović, Goran
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2790
AB  - In this research paper, measurement data of air and water temperatures and 
water levels for "Bileca" reservoir for a period between 1967. and 2017. are presented. 
Based on the averaged measurement data values, an analytical expressions for amplitude 
of periodic temperature variation of "Bileca" reservoir are derived and an average annual 
temperature, as a function of the observed depth, is obtained, based on Bofang model. The 
obtained results allow thermal stress analysis, which represents an important factor for 
stability and safety monitoring of dams.
PB  - Građevinski fakultet Subotica
C3  - Zbornik radova 7. Međunarodne konferencije - Savremena dostignuća u građevinarstvu 2019
T1  - A method of determining parameters of Bofang model on the example of "Bileca" reservoir
EP  - 705
SP  - 695
DO  - 10.14415/konferencijaGFS2019.064
ER  - 

@conference{
author = "Mirković, Uroš and Ivanović, Jovana and Pavić, Maja and Radovanović, Slobodan and Mirković, Nikola and Gospavić, Radovan and Todorović, Goran",
year = "2019",
abstract = "In this research paper, measurement data of air and water temperatures and 
water levels for "Bileca" reservoir for a period between 1967. and 2017. are presented. 
Based on the averaged measurement data values, an analytical expressions for amplitude 
of periodic temperature variation of "Bileca" reservoir are derived and an average annual 
temperature, as a function of the observed depth, is obtained, based on Bofang model. The 
obtained results allow thermal stress analysis, which represents an important factor for 
stability and safety monitoring of dams.",
publisher = "Građevinski fakultet Subotica",
journal = "Zbornik radova 7. Međunarodne konferencije - Savremena dostignuća u građevinarstvu 2019",
title = "A method of determining parameters of Bofang model on the example of "Bileca" reservoir",
pages = "705-695",
doi = "10.14415/konferencijaGFS2019.064"
}

Mirković, U., Ivanović, J., Pavić, M., Radovanović, S., Mirković, N., Gospavić, R.,& Todorović, G.. (2019). A method of determining parameters of Bofang model on the example of "Bileca" reservoir. in Zbornik radova 7. Međunarodne konferencije - Savremena dostignuća u građevinarstvu 2019
Građevinski fakultet Subotica., 695-705.
https://doi.org/10.14415/konferencijaGFS2019.064

Mirković U, Ivanović J, Pavić M, Radovanović S, Mirković N, Gospavić R, Todorović G. A method of determining parameters of Bofang model on the example of "Bileca" reservoir. in Zbornik radova 7. Međunarodne konferencije - Savremena dostignuća u građevinarstvu 2019. 2019;:695-705.
doi:10.14415/konferencijaGFS2019.064 .

Mirković, Uroš, Ivanović, Jovana, Pavić, Maja, Radovanović, Slobodan, Mirković, Nikola, Gospavić, Radovan, Todorović, Goran, "A method of determining parameters of Bofang model on the example of "Bileca" reservoir" in Zbornik radova 7. Međunarodne konferencije - Savremena dostignuća u građevinarstvu 2019 (2019):695-705,
https://doi.org/10.14415/konferencijaGFS2019.064 . .