TY  - CONF
AU  - Milutinović, Goran
AU  - Pecić, Nenad
AU  - Hajdin, Rade
AU  - Mašović, Snežana
AU  - Bobera, Dusan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3273
AB  - Pile cap is a typical example of a discontinuity region, where the classical beam theory does not apply. Therefore, strut-and-tie (STM) model is considered appropriate for the analysis of pile caps. Although, the strut-and-tie method is a powerful tool, one of its shortcomings is the need for guidelines for the standardized models. Otherwise, it is left to the designer to come up subjectively with the STM model, which is a sensitive task. In literature, usually simple loading (axial compression or compression with bending only in one direction) on a four-pile cap is discussed. In practice, for real bridge structure, usual loading is alternate biaxial bending, along with compression, on much larger number of piles, making the typical four-pile caps models useless. A practical methodology for creating pile cap model with large number of piles and with complex loading is presented step-by-step. It is further illustrated for the cases with six piles and eight piles from the actual bridge structures, where the method was applied in practice.
C3  - INTERNATIONAL SCIENTIFIC CONFERENCE PLANNING, DESIGN, CONSTRUCTION AND BUILDING RENEWAL - INDIS 2023
T1  - А practical method for strut-and-tie modelling of the bridge pile cap
EP  - 12
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3273
ER  - 

@conference{
author = "Milutinović, Goran and Pecić, Nenad and Hajdin, Rade and Mašović, Snežana and Bobera, Dusan",
year = "2023",
abstract = "Pile cap is a typical example of a discontinuity region, where the classical beam theory does not apply. Therefore, strut-and-tie (STM) model is considered appropriate for the analysis of pile caps. Although, the strut-and-tie method is a powerful tool, one of its shortcomings is the need for guidelines for the standardized models. Otherwise, it is left to the designer to come up subjectively with the STM model, which is a sensitive task. In literature, usually simple loading (axial compression or compression with bending only in one direction) on a four-pile cap is discussed. In practice, for real bridge structure, usual loading is alternate biaxial bending, along with compression, on much larger number of piles, making the typical four-pile caps models useless. A practical methodology for creating pile cap model with large number of piles and with complex loading is presented step-by-step. It is further illustrated for the cases with six piles and eight piles from the actual bridge structures, where the method was applied in practice.",
journal = "INTERNATIONAL SCIENTIFIC CONFERENCE PLANNING, DESIGN, CONSTRUCTION AND BUILDING RENEWAL - INDIS 2023",
title = "А practical method for strut-and-tie modelling of the bridge pile cap",
pages = "12-1",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3273"
}

Milutinović, G., Pecić, N., Hajdin, R., Mašović, S.,& Bobera, D.. (2023). А practical method for strut-and-tie modelling of the bridge pile cap. in INTERNATIONAL SCIENTIFIC CONFERENCE PLANNING, DESIGN, CONSTRUCTION AND BUILDING RENEWAL - INDIS 2023, 1-12.
https://hdl.handle.net/21.15107/rcub_grafar_3273

Milutinović G, Pecić N, Hajdin R, Mašović S, Bobera D. А practical method for strut-and-tie modelling of the bridge pile cap. in INTERNATIONAL SCIENTIFIC CONFERENCE PLANNING, DESIGN, CONSTRUCTION AND BUILDING RENEWAL - INDIS 2023. 2023;:1-12.
https://hdl.handle.net/21.15107/rcub_grafar_3273 .

Milutinović, Goran, Pecić, Nenad, Hajdin, Rade, Mašović, Snežana, Bobera, Dusan, "А practical method for strut-and-tie modelling of the bridge pile cap" in INTERNATIONAL SCIENTIFIC CONFERENCE PLANNING, DESIGN, CONSTRUCTION AND BUILDING RENEWAL - INDIS 2023 (2023):1-12,
https://hdl.handle.net/21.15107/rcub_grafar_3273 .

TY  - JOUR
AU  - Mašović, Snežana
AU  - Pecić, Nenad
AU  - Stošić, Saša
AU  - Hajdin, Rade
AU  - Tanasić, Nikola
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3189
AB  - Risk is involved in the whole lifecycle of a structure: design, construction, utilization and demolition. There is a close connection between reliability and risk. Contemporary building codes introduce consideration of the reliability in structural design. Here, the concept of risk takes into account the level of consequences of a failure. Structural engineers, used to deterministic calculation procedures, are often unfamiliar with the uncertainties associated with risk analysis. An overview of the basic principles of risk management in civil engineering is presented in this paper.
PB  - Society for Materials and Structures Testing of Serbia Faculty of Civil Engineering, University of Belgrade, Serbia Association of Structural Engineers of Serbia
T2  - Građevinski materijali i konstrukcije/Building Materials and Structures
T1  - Risk management in civil engineering
EP  - 126
IS  - 2
SP  - 115
VL  - 66
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3189
ER  - 

@article{
author = "Mašović, Snežana and Pecić, Nenad and Stošić, Saša and Hajdin, Rade and Tanasić, Nikola",
year = "2023",
abstract = "Risk is involved in the whole lifecycle of a structure: design, construction, utilization and demolition. There is a close connection between reliability and risk. Contemporary building codes introduce consideration of the reliability in structural design. Here, the concept of risk takes into account the level of consequences of a failure. Structural engineers, used to deterministic calculation procedures, are often unfamiliar with the uncertainties associated with risk analysis. An overview of the basic principles of risk management in civil engineering is presented in this paper.",
publisher = "Society for Materials and Structures Testing of Serbia Faculty of Civil Engineering, University of Belgrade, Serbia Association of Structural Engineers of Serbia",
journal = "Građevinski materijali i konstrukcije/Building Materials and Structures",
title = "Risk management in civil engineering",
pages = "126-115",
number = "2",
volume = "66",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3189"
}

Mašović, S., Pecić, N., Stošić, S., Hajdin, R.,& Tanasić, N.. (2023). Risk management in civil engineering. in Građevinski materijali i konstrukcije/Building Materials and Structures
Society for Materials and Structures Testing of Serbia Faculty of Civil Engineering, University of Belgrade, Serbia Association of Structural Engineers of Serbia., 66(2), 115-126.
https://hdl.handle.net/21.15107/rcub_grafar_3189

Mašović S, Pecić N, Stošić S, Hajdin R, Tanasić N. Risk management in civil engineering. in Građevinski materijali i konstrukcije/Building Materials and Structures. 2023;66(2):115-126.
https://hdl.handle.net/21.15107/rcub_grafar_3189 .

Mašović, Snežana, Pecić, Nenad, Stošić, Saša, Hajdin, Rade, Tanasić, Nikola, "Risk management in civil engineering" in Građevinski materijali i konstrukcije/Building Materials and Structures, 66, no. 2 (2023):115-126,
https://hdl.handle.net/21.15107/rcub_grafar_3189 .

TY  - CONF
AU  - Pecić, Nenad
AU  - Stošić, Saša
AU  - Mašović, Snežana
AU  - Mašović, Dragan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3190
AB  - Shear design in Eurocode 2 is generally developed for rectangular sections or T-sections that have
clearly defined tension reinforcement, concentrated in the cross-sectional tension zone, and an
unambiguous width of compressed diagonals. In circular sections, which are also frequent in practice, the reinforcement is evenly distributed along the circumference of the section, while the width of the section changes continuously along the height.
Several proposals for the shear design of circular sections can be found in the literature, based on a relatively limited experimental database, which generally provide different structural resistances. This paper aims to enable the practical application of the Eurocode 2 variable-angle truss model in the shear design of elements of circular cross-section, such as columns or piles. It is intended to make a correct interpretation of the truss model with no intention to propose an improved procedure in accordance with the available experimental results.
PB  - MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia
C3  - Proceedings of the 20th International Symposium MASE, Skopje, North Macedonia, 28 – 29 September 2023
T1  - Shear design of circular concrete sections according to the EC2 truss model
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3190
ER  - 

@conference{
author = "Pecić, Nenad and Stošić, Saša and Mašović, Snežana and Mašović, Dragan",
year = "2023",
abstract = "Shear design in Eurocode 2 is generally developed for rectangular sections or T-sections that have
clearly defined tension reinforcement, concentrated in the cross-sectional tension zone, and an
unambiguous width of compressed diagonals. In circular sections, which are also frequent in practice, the reinforcement is evenly distributed along the circumference of the section, while the width of the section changes continuously along the height.
Several proposals for the shear design of circular sections can be found in the literature, based on a relatively limited experimental database, which generally provide different structural resistances. This paper aims to enable the practical application of the Eurocode 2 variable-angle truss model in the shear design of elements of circular cross-section, such as columns or piles. It is intended to make a correct interpretation of the truss model with no intention to propose an improved procedure in accordance with the available experimental results.",
publisher = "MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia",
journal = "Proceedings of the 20th International Symposium MASE, Skopje, North Macedonia, 28 – 29 September 2023",
title = "Shear design of circular concrete sections according to the EC2 truss model",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3190"
}

Pecić, N., Stošić, S., Mašović, S.,& Mašović, D.. (2023). Shear design of circular concrete sections according to the EC2 truss model. in Proceedings of the 20th International Symposium MASE, Skopje, North Macedonia, 28 – 29 September 2023
MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia..
https://hdl.handle.net/21.15107/rcub_grafar_3190

Pecić N, Stošić S, Mašović S, Mašović D. Shear design of circular concrete sections according to the EC2 truss model. in Proceedings of the 20th International Symposium MASE, Skopje, North Macedonia, 28 – 29 September 2023. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3190 .

Pecić, Nenad, Stošić, Saša, Mašović, Snežana, Mašović, Dragan, "Shear design of circular concrete sections according to the EC2 truss model" in Proceedings of the 20th International Symposium MASE, Skopje, North Macedonia, 28 – 29 September 2023 (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3190 .

TY  - JOUR
AU  - Pecić, Nenad
AU  - Mašović, Snežana
AU  - Stošić, Saša
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2681
AB  - Indirect deflection control usually applies the limitation of the span-to-depth
ratio. The procedures that have developed in the past decades have mostly
been derived for predefined values of some of the relevant parameters. Assigning
values to parameters simplifies the application of criteria. Predefined
values may not be suitable for all design situations and some of the recently
published procedures allow direct selection of relevant parameters. This paper
offers new expressions for span-to-depth ratio limits for deflection control.
Expressions include cross-section size, area, and position of tensile and compressive
reinforcement, mechanical and long-term properties of concrete and
deflection limit. The load level is represented by the stress in the tensile reinforcement
so that the ratio of live and total load can be arbitrary. The dimensionless
form of deflection calculation by numerical integration of the mean
curvature according to Eurocode 2 is used to formulate the expressions. The
proposed procedure is verified with a large number of numerical simulations
for different combinations of inputs. Measured long-term deflections, available
from the literature, are also used to test the procedure. The expressions are
suitable for both deflection control and conceptual design.
T2  - Structural Concrete
T1  - Span-to-depth ratio limits for deflection control of reinforced concrete elements
DO  - DOI: 10.1002/suco.202200132
ER  - 

@article{
author = "Pecić, Nenad and Mašović, Snežana and Stošić, Saša",
year = "2022",
abstract = "Indirect deflection control usually applies the limitation of the span-to-depth
ratio. The procedures that have developed in the past decades have mostly
been derived for predefined values of some of the relevant parameters. Assigning
values to parameters simplifies the application of criteria. Predefined
values may not be suitable for all design situations and some of the recently
published procedures allow direct selection of relevant parameters. This paper
offers new expressions for span-to-depth ratio limits for deflection control.
Expressions include cross-section size, area, and position of tensile and compressive
reinforcement, mechanical and long-term properties of concrete and
deflection limit. The load level is represented by the stress in the tensile reinforcement
so that the ratio of live and total load can be arbitrary. The dimensionless
form of deflection calculation by numerical integration of the mean
curvature according to Eurocode 2 is used to formulate the expressions. The
proposed procedure is verified with a large number of numerical simulations
for different combinations of inputs. Measured long-term deflections, available
from the literature, are also used to test the procedure. The expressions are
suitable for both deflection control and conceptual design.",
journal = "Structural Concrete",
title = "Span-to-depth ratio limits for deflection control of reinforced concrete elements",
doi = "DOI: 10.1002/suco.202200132"
}

Pecić, N., Mašović, S.,& Stošić, S.. (2022). Span-to-depth ratio limits for deflection control of reinforced concrete elements. in Structural Concrete.
https://doi.org/DOI: 10.1002/suco.202200132

Pecić N, Mašović S, Stošić S. Span-to-depth ratio limits for deflection control of reinforced concrete elements. in Structural Concrete. 2022;.
doi:DOI: 10.1002/suco.202200132 .

Pecić, Nenad, Mašović, Snežana, Stošić, Saša, "Span-to-depth ratio limits for deflection control of reinforced concrete elements" in Structural Concrete (2022),
https://doi.org/DOI: 10.1002/suco.202200132 . .

TY  - CONF
AU  - Pecić, Nenad
AU  - Radosavljević, Uglješa
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2965
AB  - U radu je prikazana metodologija koja je primenjena kod kontrolnih proračuna dva
armiranobetonska turbo-stola termoelektrane „Nikola Tesla“ u Obrenovcu. Proračuni su rađeni sa
ciljem utvrđivanja stanja konstrukcija nakon višedecenijske eksploatacije i procene mogućnosti
njihovog daljeg korišćenja. Opisan je način formiranja proračunskog modela sa naglaskom na što
preciznije modeliranje krutosti radi adekvatnog sagledavanja ponašanja pod dinamičkim
opterećenjem. Model je kalibrisan upotrebom merenih vrednosti parametara materijala i
registrovanih dinamičkih karakteristika u radnom režimu i pri isključenoj opremi.
PB  - Savez građevinskih inženjera Srbije / Association of Civil Engineers of Serbia Beograd, Kneza Miloša 9/I
C3  - Zbornik radova Dvanaestog naučno-stručnog međunarodnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekata, Vrnjačka Banja, 29. jun – 1. jul 2022.
T1  - Procena stanja temeljnih konstrukcija turbo-generatora blokova A1 i A2 termo elektrane „Nikola Tesla“
EP  - 141
SP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2965
ER  - 

@conference{
author = "Pecić, Nenad and Radosavljević, Uglješa",
year = "2022",
abstract = "U radu je prikazana metodologija koja je primenjena kod kontrolnih proračuna dva
armiranobetonska turbo-stola termoelektrane „Nikola Tesla“ u Obrenovcu. Proračuni su rađeni sa
ciljem utvrđivanja stanja konstrukcija nakon višedecenijske eksploatacije i procene mogućnosti
njihovog daljeg korišćenja. Opisan je način formiranja proračunskog modela sa naglaskom na što
preciznije modeliranje krutosti radi adekvatnog sagledavanja ponašanja pod dinamičkim
opterećenjem. Model je kalibrisan upotrebom merenih vrednosti parametara materijala i
registrovanih dinamičkih karakteristika u radnom režimu i pri isključenoj opremi.",
publisher = "Savez građevinskih inženjera Srbije / Association of Civil Engineers of Serbia Beograd, Kneza Miloša 9/I",
journal = "Zbornik radova Dvanaestog naučno-stručnog međunarodnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekata, Vrnjačka Banja, 29. jun – 1. jul 2022.",
title = "Procena stanja temeljnih konstrukcija turbo-generatora blokova A1 i A2 termo elektrane „Nikola Tesla“",
pages = "141-132",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2965"
}

Pecić, N.,& Radosavljević, U.. (2022). Procena stanja temeljnih konstrukcija turbo-generatora blokova A1 i A2 termo elektrane „Nikola Tesla“. in Zbornik radova Dvanaestog naučno-stručnog međunarodnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekata, Vrnjačka Banja, 29. jun – 1. jul 2022.
Savez građevinskih inženjera Srbije / Association of Civil Engineers of Serbia Beograd, Kneza Miloša 9/I., 132-141.
https://hdl.handle.net/21.15107/rcub_grafar_2965

Pecić N, Radosavljević U. Procena stanja temeljnih konstrukcija turbo-generatora blokova A1 i A2 termo elektrane „Nikola Tesla“. in Zbornik radova Dvanaestog naučno-stručnog međunarodnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekata, Vrnjačka Banja, 29. jun – 1. jul 2022.. 2022;:132-141.
https://hdl.handle.net/21.15107/rcub_grafar_2965 .

Pecić, Nenad, Radosavljević, Uglješa, "Procena stanja temeljnih konstrukcija turbo-generatora blokova A1 i A2 termo elektrane „Nikola Tesla“" in Zbornik radova Dvanaestog naučno-stručnog međunarodnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekata, Vrnjačka Banja, 29. jun – 1. jul 2022. (2022):132-141,
https://hdl.handle.net/21.15107/rcub_grafar_2965 .

TY  - CONF
AU  - Pecić, Nenad
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2968
AB  - U radu su diskutovani postupci za verifikaciju ugiba prema Evrokodu 2 (EN 1992-1-1:2004).
Nekoliko problema se javlja pri primeni indirektnog postupka zasnovanog na ograničavanju
odnosa raspon-statička visina. Osim što nisu svi inputi jednoznačno definisani, vrednosti
ključnih parametara usvojene pri izvođenju kriterijuma često ne odgovaraju stvarnim
konstrukcijama, te je proračun ugiba često neophodan. Najjednostavnija mogućnost za
proračun bazira se na interpolaciji između vrednosti ugiba određenog za element bez prslina i
za potpuno isprskao element, što je ekvivalentno bi-linearnom postupku CEB-a. Rigorozni
proračun koristi postupak numeričke integracije dugotrajnih krivina sračunatih u većem broju
preseka duž raspona, ali za njegovo sprovođenje nedostaju ključne instrukcije u nekim
slučajevima.
PB  - Univerzitet u Beogradu Građevinski fakultet Beograd, Bulevar kralja Aleksandra 73/I; Društvo građevinskih konstruktera Srbije Beograd, Bulevar kralja Aleksandra 73
C3  - Zbornik radova sa Nacionalnog kongresa DGKS ASES / Društvо građevinskih konstruktera Srbije, 16. Kongres, 28 - 30. 9. 2022, Aranđelovac
T1  - Kontrola ugiba prema Evrokodu 2
EP  - 221
SP  - 212
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2968
ER  - 

@conference{
author = "Pecić, Nenad",
year = "2022",
abstract = "U radu su diskutovani postupci za verifikaciju ugiba prema Evrokodu 2 (EN 1992-1-1:2004).
Nekoliko problema se javlja pri primeni indirektnog postupka zasnovanog na ograničavanju
odnosa raspon-statička visina. Osim što nisu svi inputi jednoznačno definisani, vrednosti
ključnih parametara usvojene pri izvođenju kriterijuma često ne odgovaraju stvarnim
konstrukcijama, te je proračun ugiba često neophodan. Najjednostavnija mogućnost za
proračun bazira se na interpolaciji između vrednosti ugiba određenog za element bez prslina i
za potpuno isprskao element, što je ekvivalentno bi-linearnom postupku CEB-a. Rigorozni
proračun koristi postupak numeričke integracije dugotrajnih krivina sračunatih u većem broju
preseka duž raspona, ali za njegovo sprovođenje nedostaju ključne instrukcije u nekim
slučajevima.",
publisher = "Univerzitet u Beogradu Građevinski fakultet Beograd, Bulevar kralja Aleksandra 73/I; Društvo građevinskih konstruktera Srbije Beograd, Bulevar kralja Aleksandra 73",
journal = "Zbornik radova sa Nacionalnog kongresa DGKS ASES / Društvо građevinskih konstruktera Srbije, 16. Kongres, 28 - 30. 9. 2022, Aranđelovac",
title = "Kontrola ugiba prema Evrokodu 2",
pages = "221-212",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2968"
}

Pecić, N.. (2022). Kontrola ugiba prema Evrokodu 2. in Zbornik radova sa Nacionalnog kongresa DGKS ASES / Društvо građevinskih konstruktera Srbije, 16. Kongres, 28 - 30. 9. 2022, Aranđelovac
Univerzitet u Beogradu Građevinski fakultet Beograd, Bulevar kralja Aleksandra 73/I; Društvo građevinskih konstruktera Srbije Beograd, Bulevar kralja Aleksandra 73., 212-221.
https://hdl.handle.net/21.15107/rcub_grafar_2968

Pecić N. Kontrola ugiba prema Evrokodu 2. in Zbornik radova sa Nacionalnog kongresa DGKS ASES / Društvо građevinskih konstruktera Srbije, 16. Kongres, 28 - 30. 9. 2022, Aranđelovac. 2022;:212-221.
https://hdl.handle.net/21.15107/rcub_grafar_2968 .

Pecić, Nenad, "Kontrola ugiba prema Evrokodu 2" in Zbornik radova sa Nacionalnog kongresa DGKS ASES / Društvо građevinskih konstruktera Srbije, 16. Kongres, 28 - 30. 9. 2022, Aranđelovac (2022):212-221,
https://hdl.handle.net/21.15107/rcub_grafar_2968 .

TY  - CONF
AU  - Pecić, Nenad
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2962
AB  - Structural Eurocodes have superseded national design codes in a number of countries. The education
of engineers is necessary for quick and successful adaptation to new standards. Qualified institutions
should organize appropriate training programs and provide quality manuals with clear and precise
instructions.
A possible approach for practicing the new regulations is to compare the procedures and results of the
design according to the former regulations, which are well known by the designers, and the
corresponding procedures in the new regulations.
This paper compares the basic design inputs in the Code for Concrete Structures of the Former
Yugoslavia (BAB 87) and Eurocode 2 (EN 1992-1-1: 2004). In addition, a comparison of the basic
ULS and SLS design procedures is presented, as well as an analysis of the obtained results. ULS
design for bending and for shear are studied. Control of cracking and deflection control are covered in
the SLS domain.
The comparisons are intended to indicate to the designers whether their previous experience in the
design of structures is in accordance with the requirements of the new regulations. The derived
conclusions can be useful in assessing the compliance of existing structures, designed according to
BAB 87, with the requirements of Eurocode 2
PB  - MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia
C3  - Proceedings of the 19th international symposium of MASE, 15-18 September 2021, Ohrid
T1  - Design of concrete structures according to Eurocode 2 and BAB 87: comparison of basic calculations
EP  - 162
SP  - 147
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2962
ER  - 

@conference{
author = "Pecić, Nenad",
year = "2022",
abstract = "Structural Eurocodes have superseded national design codes in a number of countries. The education
of engineers is necessary for quick and successful adaptation to new standards. Qualified institutions
should organize appropriate training programs and provide quality manuals with clear and precise
instructions.
A possible approach for practicing the new regulations is to compare the procedures and results of the
design according to the former regulations, which are well known by the designers, and the
corresponding procedures in the new regulations.
This paper compares the basic design inputs in the Code for Concrete Structures of the Former
Yugoslavia (BAB 87) and Eurocode 2 (EN 1992-1-1: 2004). In addition, a comparison of the basic
ULS and SLS design procedures is presented, as well as an analysis of the obtained results. ULS
design for bending and for shear are studied. Control of cracking and deflection control are covered in
the SLS domain.
The comparisons are intended to indicate to the designers whether their previous experience in the
design of structures is in accordance with the requirements of the new regulations. The derived
conclusions can be useful in assessing the compliance of existing structures, designed according to
BAB 87, with the requirements of Eurocode 2",
publisher = "MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia",
journal = "Proceedings of the 19th international symposium of MASE, 15-18 September 2021, Ohrid",
title = "Design of concrete structures according to Eurocode 2 and BAB 87: comparison of basic calculations",
pages = "162-147",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2962"
}

Pecić, N.. (2022). Design of concrete structures according to Eurocode 2 and BAB 87: comparison of basic calculations. in Proceedings of the 19th international symposium of MASE, 15-18 September 2021, Ohrid
MASE - Macedonian Association of Structural Engineers Faculty of Civil Engineering, Blvd. Partizanski odredi No. 24 P.Box. 560, 1000 Skopje, Republic of North Macedonia., 147-162.
https://hdl.handle.net/21.15107/rcub_grafar_2962

Pecić N. Design of concrete structures according to Eurocode 2 and BAB 87: comparison of basic calculations. in Proceedings of the 19th international symposium of MASE, 15-18 September 2021, Ohrid. 2022;:147-162.
https://hdl.handle.net/21.15107/rcub_grafar_2962 .

Pecić, Nenad, "Design of concrete structures according to Eurocode 2 and BAB 87: comparison of basic calculations" in Proceedings of the 19th international symposium of MASE, 15-18 September 2021, Ohrid (2022):147-162,
https://hdl.handle.net/21.15107/rcub_grafar_2962 .

TY  - CONF
AU  - Tošić, Nikola
AU  - Pecić, Nenad
AU  - Marí, Antonio
AU  - Torres, Lluis
AU  - Dragaš, Jelena
AU  - Poliotti, Mauro
PY  - 2021-06-14
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3193
AB  - Deflection control of two-way slabs is a very complex task considering their possible geometries, structural systems, reinforcement layouts and loading histories, as well as the large number of influencing parameters and moment redistribution due to cracking and time-dependent effects of creep and shrinkage. As a consequence, sufficiently simple and accurate methods for deflection control of two-way reinforced concrete slabs have are still missing. In order to fill this gap, a novel method was developed as an adaptation of the ζ-method (as defined by the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. The method is based on deflections obtained using linear-elastic analyses in finite element software, which are then transformed through a series of stiffness normalizations to obtain time-dependent deflections due to load and shrinkage. Furthermore, the moment redistribution capacity of two-way slabs is accounted for through adjustments of the interpolation coefficient ζ. The method is tested against available experimental results from literature and compared with results obtained using existing methods such as the crossing beam method. The results show good precision and accuracy of the proposed method and an improvement compared with existing methods.
C3  - fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings"
T1  - Development and assessment of a modified ζ-method for deflection control of two-way slabs
EP  - 1557
SP  - 1549
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3193
ER  - 

@conference{
author = "Tošić, Nikola and Pecić, Nenad and Marí, Antonio and Torres, Lluis and Dragaš, Jelena and Poliotti, Mauro",
year = "2021-06-14",
abstract = "Deflection control of two-way slabs is a very complex task considering their possible geometries, structural systems, reinforcement layouts and loading histories, as well as the large number of influencing parameters and moment redistribution due to cracking and time-dependent effects of creep and shrinkage. As a consequence, sufficiently simple and accurate methods for deflection control of two-way reinforced concrete slabs have are still missing. In order to fill this gap, a novel method was developed as an adaptation of the ζ-method (as defined by the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. The method is based on deflections obtained using linear-elastic analyses in finite element software, which are then transformed through a series of stiffness normalizations to obtain time-dependent deflections due to load and shrinkage. Furthermore, the moment redistribution capacity of two-way slabs is accounted for through adjustments of the interpolation coefficient ζ. The method is tested against available experimental results from literature and compared with results obtained using existing methods such as the crossing beam method. The results show good precision and accuracy of the proposed method and an improvement compared with existing methods.",
journal = "fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings"",
title = "Development and assessment of a modified ζ-method for deflection control of two-way slabs",
pages = "1557-1549",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3193"
}

Tošić, N., Pecić, N., Marí, A., Torres, L., Dragaš, J.,& Poliotti, M.. (2021-06-14). Development and assessment of a modified ζ-method for deflection control of two-way slabs. in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings", 1549-1557.
https://hdl.handle.net/21.15107/rcub_grafar_3193

Tošić N, Pecić N, Marí A, Torres L, Dragaš J, Poliotti M. Development and assessment of a modified ζ-method for deflection control of two-way slabs. in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings". 2021;:1549-1557.
https://hdl.handle.net/21.15107/rcub_grafar_3193 .

Tošić, Nikola, Pecić, Nenad, Marí, Antonio, Torres, Lluis, Dragaš, Jelena, Poliotti, Mauro, "Development and assessment of a modified ζ-method for deflection control of two-way slabs" in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings" (2021-06-14):1549-1557,
https://hdl.handle.net/21.15107/rcub_grafar_3193 .

TY  - CONF
AU  - Mašović, Snežana
AU  - Pecić, Nenad
AU  - Stošić, Saša
AU  - Masovic, Dragan
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2384
AB  - Propisi za projektovanje konstrukcija se u svetu kontinuirano unapređuju u skladu sa napretkom
tehnike i naučnih znanja. Poboljšanja se odnose na metode koje se koriste za proračun nosivosti
i upotrebljivosti konstrukcija, a takođe i na modele opterećenja. Od 2020. godine u Srbiji su u
primeni propisi za opterećenja mostova prema Evrokodu 1 SRPS EN: 1991-2. Modeli
saobraćajnog opterećenja koji se primjenjuju pri proračunu novih mostova baziraju se na
projekcijama saobraćaja u budućnosti i njihova upotreba u analizi postojećih mostova ne mora
da bude adekvatna. U ovome su radu se daje pregled modela saobraćajnog opterećenja drumskih
mostova prema propisima koji su korišćeni u Srbiji tokom dvadesetog veka, sa posebnim
osvrtom na nove propise.
AB  - Regulations for the design of structures are continuously improved in the world in accordance
with the progress of technology and scientific knowledge. The improvements relate to the
methods used in limit state design of structures, as well as to the load models. Since 2020.,
regulations for traffic loads on bridges according to Eurocode 1 SRPS EN: 1991-2 have been
established in Serbia. The traffic load models applied in the calculation of new bridges are based
on future traffic projections and their use in the analysis of existing bridges may not be adequate.
This paper provides an overview of the traffic load models for road bridges according to the
regulations used in Serbia during the twentieth century, with special reference to the new
regulations.
C3  - ДРУШТВО грађевинских конструктера Србије. Симпозијум 2020 (2021 ; Аранђеловац) Zbornik radova sa Nacionalnog simpozijuma DGKS [Elektronski izvor]
T1  - Novi propisi za saobraćajna opterećenja drumskih mostova
T1  - New regulations for traffic loads on road bridges
EP  - 473
SP  - 464
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2384
ER  - 

@conference{
author = "Mašović, Snežana and Pecić, Nenad and Stošić, Saša and Masovic, Dragan",
year = "2021",
abstract = "Propisi za projektovanje konstrukcija se u svetu kontinuirano unapređuju u skladu sa napretkom
tehnike i naučnih znanja. Poboljšanja se odnose na metode koje se koriste za proračun nosivosti
i upotrebljivosti konstrukcija, a takođe i na modele opterećenja. Od 2020. godine u Srbiji su u
primeni propisi za opterećenja mostova prema Evrokodu 1 SRPS EN: 1991-2. Modeli
saobraćajnog opterećenja koji se primjenjuju pri proračunu novih mostova baziraju se na
projekcijama saobraćaja u budućnosti i njihova upotreba u analizi postojećih mostova ne mora
da bude adekvatna. U ovome su radu se daje pregled modela saobraćajnog opterećenja drumskih
mostova prema propisima koji su korišćeni u Srbiji tokom dvadesetog veka, sa posebnim
osvrtom na nove propise., Regulations for the design of structures are continuously improved in the world in accordance
with the progress of technology and scientific knowledge. The improvements relate to the
methods used in limit state design of structures, as well as to the load models. Since 2020.,
regulations for traffic loads on bridges according to Eurocode 1 SRPS EN: 1991-2 have been
established in Serbia. The traffic load models applied in the calculation of new bridges are based
on future traffic projections and their use in the analysis of existing bridges may not be adequate.
This paper provides an overview of the traffic load models for road bridges according to the
regulations used in Serbia during the twentieth century, with special reference to the new
regulations.",
journal = "ДРУШТВО грађевинских конструктера Србије. Симпозијум 2020 (2021 ; Аранђеловац) Zbornik radova sa Nacionalnog simpozijuma DGKS [Elektronski izvor]",
title = "Novi propisi za saobraćajna opterećenja drumskih mostova, New regulations for traffic loads on road bridges",
pages = "473-464",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2384"
}

Mašović, S., Pecić, N., Stošić, S.,& Masovic, D.. (2021). Novi propisi za saobraćajna opterećenja drumskih mostova. in ДРУШТВО грађевинских конструктера Србије. Симпозијум 2020 (2021 ; Аранђеловац) Zbornik radova sa Nacionalnog simpozijuma DGKS [Elektronski izvor], 464-473.
https://hdl.handle.net/21.15107/rcub_grafar_2384

Mašović S, Pecić N, Stošić S, Masovic D. Novi propisi za saobraćajna opterećenja drumskih mostova. in ДРУШТВО грађевинских конструктера Србије. Симпозијум 2020 (2021 ; Аранђеловац) Zbornik radova sa Nacionalnog simpozijuma DGKS [Elektronski izvor]. 2021;:464-473.
https://hdl.handle.net/21.15107/rcub_grafar_2384 .

Mašović, Snežana, Pecić, Nenad, Stošić, Saša, Masovic, Dragan, "Novi propisi za saobraćajna opterećenja drumskih mostova" in ДРУШТВО грађевинских конструктера Србије. Симпозијум 2020 (2021 ; Аранђеловац) Zbornik radova sa Nacionalnog simpozijuma DGKS [Elektronski izvor] (2021):464-473,
https://hdl.handle.net/21.15107/rcub_grafar_2384 .

TY  - CONF
AU  - Pecić, Nenad
AU  - Mašović, Snežana
AU  - Stošić, Saša
AU  - Mašović, Dragan
PY  - 2021
UR  - http://www.gf.uns.ac.rs/~zbornik/doc/NS2021.15.pdf
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2382
AB  - The design of concrete members for shear without stirrups, except for the
minimum required, has become a major issue worldwide. It was noticed that the shear
capacity of concrete element according to the Eurocode 2 often gives significant smaller
values than the one predicted by former codes. This fact brought into focus the assessment
of the existing structures which were built with minimum shear reinforcement. Most of the
Code provisions for shear for members without shear reinforcement are based on
empirical relationships. In general, Eurocode 2 doesn’t make a difference between
reinforced and prestressed elements. Several clauses in EN1992-1-1 which deal with the
shear design are critically reviewed in the paper.
AB  - Доказ носивости бетонских елемената на смицање који имају само
минималну попречну арматуру постао је учестао проблем. Примећено је да је
носивост на смицање бетонског елемента без прорачунске арматуре за смицање
према Еврокоду 2 може бити знатно мање вредности од оне предвиђене ранијим
кодовима. То је створило проблем при процени носивости постојећих конструкција
које су изведене без осигурања арматуром за смицање. Генерално, Еврокод 2 не
прави суштинску разлику између армирано-бетонских и претнодно напрегнутих
елемената и у већини питања третира их на исти начин. Неколико клаузула у
ЕН1992-1-1 које се баве контролом смицања су критички разматране у раду.
PB  - Univerzitet z Novom Sadu; Građevinski Fakultet Subotica
C3  - CONFERENCE PROCEEDINGS 8-th INTERNATIONAL CONFERENCE CONTEMPORARY ACHIVEMENT IN CIVIL ENGINEERING 2021
T1  - Shear provisions for concrete structures according to en 1992-1-1: open issues
T1  - Контрола на смицање бетонских конструкција према ен 1992-1-1: отворена питања
EP  - 183
SP  - 173
DO  - DOI: 10.14415/konferencijaGFS2021.15
ER  - 

@conference{
author = "Pecić, Nenad and Mašović, Snežana and Stošić, Saša and Mašović, Dragan",
year = "2021",
abstract = "The design of concrete members for shear without stirrups, except for the
minimum required, has become a major issue worldwide. It was noticed that the shear
capacity of concrete element according to the Eurocode 2 often gives significant smaller
values than the one predicted by former codes. This fact brought into focus the assessment
of the existing structures which were built with minimum shear reinforcement. Most of the
Code provisions for shear for members without shear reinforcement are based on
empirical relationships. In general, Eurocode 2 doesn’t make a difference between
reinforced and prestressed elements. Several clauses in EN1992-1-1 which deal with the
shear design are critically reviewed in the paper., Доказ носивости бетонских елемената на смицање који имају само
минималну попречну арматуру постао је учестао проблем. Примећено је да је
носивост на смицање бетонског елемента без прорачунске арматуре за смицање
према Еврокоду 2 може бити знатно мање вредности од оне предвиђене ранијим
кодовима. То је створило проблем при процени носивости постојећих конструкција
које су изведене без осигурања арматуром за смицање. Генерално, Еврокод 2 не
прави суштинску разлику између армирано-бетонских и претнодно напрегнутих
елемената и у већини питања третира их на исти начин. Неколико клаузула у
ЕН1992-1-1 које се баве контролом смицања су критички разматране у раду.",
publisher = "Univerzitet z Novom Sadu; Građevinski Fakultet Subotica",
journal = "CONFERENCE PROCEEDINGS 8-th INTERNATIONAL CONFERENCE CONTEMPORARY ACHIVEMENT IN CIVIL ENGINEERING 2021",
title = "Shear provisions for concrete structures according to en 1992-1-1: open issues, Контрола на смицање бетонских конструкција према ен 1992-1-1: отворена питања",
pages = "183-173",
doi = "DOI: 10.14415/konferencijaGFS2021.15"
}

Pecić, N., Mašović, S., Stošić, S.,& Mašović, D.. (2021). Shear provisions for concrete structures according to en 1992-1-1: open issues. in CONFERENCE PROCEEDINGS 8-th INTERNATIONAL CONFERENCE CONTEMPORARY ACHIVEMENT IN CIVIL ENGINEERING 2021
Univerzitet z Novom Sadu; Građevinski Fakultet Subotica., 173-183.
https://doi.org/DOI: 10.14415/konferencijaGFS2021.15

Pecić N, Mašović S, Stošić S, Mašović D. Shear provisions for concrete structures according to en 1992-1-1: open issues. in CONFERENCE PROCEEDINGS 8-th INTERNATIONAL CONFERENCE CONTEMPORARY ACHIVEMENT IN CIVIL ENGINEERING 2021. 2021;:173-183.
doi:DOI: 10.14415/konferencijaGFS2021.15 .

Pecić, Nenad, Mašović, Snežana, Stošić, Saša, Mašović, Dragan, "Shear provisions for concrete structures according to en 1992-1-1: open issues" in CONFERENCE PROCEEDINGS 8-th INTERNATIONAL CONFERENCE CONTEMPORARY ACHIVEMENT IN CIVIL ENGINEERING 2021 (2021):173-183,
https://doi.org/DOI: 10.14415/konferencijaGFS2021.15 . .

TY  - CONF
AU  - Mišković, Zoran
AU  - Popović, Marko
AU  - Pecić, Nenad
AU  - Savatović, Siniša
AU  - Latinović, Marina
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2380
AB  - The paper presents study of modal parameters identification of two turbine supporting structures of unit-A1 and unit-A2 in Power Plant Nikola Tesla – A in Obrenovac – Republic of Serbia, based on ambient vibration measurements. Vibration response measurements of structures were carried out in two measurement campaigns under ambient excitation, each time on unit which was out of operation. Modal frequencies and mode shapes were extracted using Frequency Domain Decomposition (FDD) technique according to recorded acceleration data. The performed numerical analysis established the dynamic characteristics of the analysed table-top foundation structure adequate to the experimentally determined ones.
C3  - Association of Sructural Engineering of Serbia - Symposium 2020
T1  - Analysis of modal properties of two nominaly identical turbine supporting structures
VL  - 511-518
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2380
ER  - 

@conference{
author = "Mišković, Zoran and Popović, Marko and Pecić, Nenad and Savatović, Siniša and Latinović, Marina",
year = "2021",
abstract = "The paper presents study of modal parameters identification of two turbine supporting structures of unit-A1 and unit-A2 in Power Plant Nikola Tesla – A in Obrenovac – Republic of Serbia, based on ambient vibration measurements. Vibration response measurements of structures were carried out in two measurement campaigns under ambient excitation, each time on unit which was out of operation. Modal frequencies and mode shapes were extracted using Frequency Domain Decomposition (FDD) technique according to recorded acceleration data. The performed numerical analysis established the dynamic characteristics of the analysed table-top foundation structure adequate to the experimentally determined ones.",
journal = "Association of Sructural Engineering of Serbia - Symposium 2020",
title = "Analysis of modal properties of two nominaly identical turbine supporting structures",
volume = "511-518",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2380"
}

Mišković, Z., Popović, M., Pecić, N., Savatović, S.,& Latinović, M.. (2021). Analysis of modal properties of two nominaly identical turbine supporting structures. in Association of Sructural Engineering of Serbia - Symposium 2020, 511-518.
https://hdl.handle.net/21.15107/rcub_grafar_2380

Mišković Z, Popović M, Pecić N, Savatović S, Latinović M. Analysis of modal properties of two nominaly identical turbine supporting structures. in Association of Sructural Engineering of Serbia - Symposium 2020. 2021;511-518.
https://hdl.handle.net/21.15107/rcub_grafar_2380 .

Mišković, Zoran, Popović, Marko, Pecić, Nenad, Savatović, Siniša, Latinović, Marina, "Analysis of modal properties of two nominaly identical turbine supporting structures" in Association of Sructural Engineering of Serbia - Symposium 2020, 511-518 (2021),
https://hdl.handle.net/21.15107/rcub_grafar_2380 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Pecić, Nenad
AU  - Poliotti, Mauro
AU  - Marí, Antonio
AU  - Torres, Lluis
AU  - Dragaš, Jelena
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2964
AB  - Deflections are among the most complex aspects of reinforced concrete behavior.
Furthermore, deflection control is increasingly a governing criterion in
design, especially in the case of two-way members such as flat slabs or edgesupported
slabs. However, simple and theoretically sound and adequately verified
methods for calculating deflections of two-way reinforced concrete members
have been lacking. Therefore, in this study, a novel method is proposed
for deflection control of two-way slabs. The method is an extension of the
ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating
deflections between the uncracked and fully cracked state. As a basis,
the method uses elastic deflections that are obtained through linear elastic
analyses in finite element software. The elastic deflection is then adequately
transformed based on the properties of a representative section, to account for
cracking, shrinkage and creep according to a modified version of the ζ-method.
Finally, the method is validated against available experimental results from literature,
obtaining satisfactory precision and accuracy. The method proposed
in this study aims at providing an easy-to-use tool for designers carrying out
deflection control of two-way reinforced concrete slabs.
PB  - wileyonlinelibrary.com
PB  - fib. International Federation for Structural Concrete
T2  - Structural Concrete
T1  - Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis
IS  - 1-19
DO  - 10.1002/suco.202000558
ER  - 

@article{
author = "Tošić, Nikola and Pecić, Nenad and Poliotti, Mauro and Marí, Antonio and Torres, Lluis and Dragaš, Jelena",
year = "2021",
abstract = "Deflections are among the most complex aspects of reinforced concrete behavior.
Furthermore, deflection control is increasingly a governing criterion in
design, especially in the case of two-way members such as flat slabs or edgesupported
slabs. However, simple and theoretically sound and adequately verified
methods for calculating deflections of two-way reinforced concrete members
have been lacking. Therefore, in this study, a novel method is proposed
for deflection control of two-way slabs. The method is an extension of the
ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating
deflections between the uncracked and fully cracked state. As a basis,
the method uses elastic deflections that are obtained through linear elastic
analyses in finite element software. The elastic deflection is then adequately
transformed based on the properties of a representative section, to account for
cracking, shrinkage and creep according to a modified version of the ζ-method.
Finally, the method is validated against available experimental results from literature,
obtaining satisfactory precision and accuracy. The method proposed
in this study aims at providing an easy-to-use tool for designers carrying out
deflection control of two-way reinforced concrete slabs.",
publisher = "wileyonlinelibrary.com, fib. International Federation for Structural Concrete",
journal = "Structural Concrete",
title = "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis",
number = "1-19",
doi = "10.1002/suco.202000558"
}

Tošić, N., Pecić, N., Poliotti, M., Marí, A., Torres, L.,& Dragaš, J.. (2021). Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete
wileyonlinelibrary.com.(1-19).
https://doi.org/10.1002/suco.202000558

Tošić N, Pecić N, Poliotti M, Marí A, Torres L, Dragaš J. Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete. 2021;(1-19).
doi:10.1002/suco.202000558 .

Tošić, Nikola, Pecić, Nenad, Poliotti, Mauro, Marí, Antonio, Torres, Lluis, Dragaš, Jelena, "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis" in Structural Concrete, no. 1-19 (2021),
https://doi.org/10.1002/suco.202000558 . .

TY  - CONF
AU  - Dragaš, Jelena
AU  - Pecić, Nenad
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2085
AB  - The use of fly ash in concrete lasts for almost a century. The first idea of using concrete as a place to
deposit fly ash and merely reduce the amount of waste came a long way to a today’s use of fly ash as a
basic component material of concrete. Extensive research and practical application regarding different
concrete types promoted the fly ash as a valuable supplementary cementitious material. The best use
of fly ash in concrete can be achieved only if the influence of fly ash on all concrete properties is
known. This paper gives a comprehensive summary of all fly ash applications in concrete with a
review of existing practical application, implementation in standards and challenges still to be
overcome. An analysis of future trends in concrete fly ash application and possible alternatives for
regions that already lack in fly ash quantities are presented and discussed.
PB  - Macedonian Association of Structural Engineers
C3  - Proceedings of the 18th International Symposium of MASE
T1  - Past, present and future of fly ash in concrete
EP  - 1368
SP  - 1358
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2085
ER  - 

@conference{
author = "Dragaš, Jelena and Pecić, Nenad",
year = "2019",
abstract = "The use of fly ash in concrete lasts for almost a century. The first idea of using concrete as a place to
deposit fly ash and merely reduce the amount of waste came a long way to a today’s use of fly ash as a
basic component material of concrete. Extensive research and practical application regarding different
concrete types promoted the fly ash as a valuable supplementary cementitious material. The best use
of fly ash in concrete can be achieved only if the influence of fly ash on all concrete properties is
known. This paper gives a comprehensive summary of all fly ash applications in concrete with a
review of existing practical application, implementation in standards and challenges still to be
overcome. An analysis of future trends in concrete fly ash application and possible alternatives for
regions that already lack in fly ash quantities are presented and discussed.",
publisher = "Macedonian Association of Structural Engineers",
journal = "Proceedings of the 18th International Symposium of MASE",
title = "Past, present and future of fly ash in concrete",
pages = "1368-1358",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2085"
}

Dragaš, J.,& Pecić, N.. (2019). Past, present and future of fly ash in concrete. in Proceedings of the 18th International Symposium of MASE
Macedonian Association of Structural Engineers., 1358-1368.
https://hdl.handle.net/21.15107/rcub_grafar_2085

Dragaš J, Pecić N. Past, present and future of fly ash in concrete. in Proceedings of the 18th International Symposium of MASE. 2019;:1358-1368.
https://hdl.handle.net/21.15107/rcub_grafar_2085 .

Dragaš, Jelena, Pecić, Nenad, "Past, present and future of fly ash in concrete" in Proceedings of the 18th International Symposium of MASE (2019):1358-1368,
https://hdl.handle.net/21.15107/rcub_grafar_2085 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1713
AB  - Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high-volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete
EP  - 358
SP  - 344
VL  - 176
DO  - 10.1016/j.conbuildmat.2018.05.002
ER  - 

@article{
author = "Tošić, Nikola and Marinković, Snežana and Pecić, Nenad and Ignjatović, Ivan and Dragaš, Jelena",
year = "2018",
abstract = "Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high-volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete",
pages = "358-344",
volume = "176",
doi = "10.1016/j.conbuildmat.2018.05.002"
}

Tošić, N., Marinković, S., Pecić, N., Ignjatović, I.,& Dragaš, J.. (2018). Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials
Elsevier., 176, 344-358.
https://doi.org/10.1016/j.conbuildmat.2018.05.002

Tošić N, Marinković S, Pecić N, Ignjatović I, Dragaš J. Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials. 2018;176:344-358.
doi:10.1016/j.conbuildmat.2018.05.002 .

Tošić, Nikola, Marinković, Snežana, Pecić, Nenad, Ignjatović, Ivan, Dragaš, Jelena, "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete" in Construction and Building Materials, 176 (2018):344-358,
https://doi.org/10.1016/j.conbuildmat.2018.05.002 . .

TY  - CONF
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - De Brito, Jorge
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1631
AB  - The environmental problems posed by the production of concrete can be solved namely by using green concrete produced with recycled and waste materials. This study intends to present results on the long-term properties of concrete produced with 100% coarse recycled concrete aggregate and concrete produced with 50% of class F fly ash in total cementitious materials and compare them with a companion natural aggregate concrete. The three concrete mixes were tested at the material level where shrinkage and creep were tested for 700 days on concrete prisms, and at the structural level where deflections, strains, and cracks of simply supported reinforc
PB  - Društvo građevinskih konstruktera Srbije, Beograd
C3  - ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
T1  - Long-term properties of green concrete: testing at the material and structural level
EP  - 227
SP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1631
ER  - 

@conference{
author = "Tošić, Nikola and Marinković, Snežana and De Brito, Jorge and Pecić, Nenad and Ignjatović, Ivan",
year = "2018",
abstract = "The environmental problems posed by the production of concrete can be solved namely by using green concrete produced with recycled and waste materials. This study intends to present results on the long-term properties of concrete produced with 100% coarse recycled concrete aggregate and concrete produced with 50% of class F fly ash in total cementitious materials and compare them with a companion natural aggregate concrete. The three concrete mixes were tested at the material level where shrinkage and creep were tested for 700 days on concrete prisms, and at the structural level where deflections, strains, and cracks of simply supported reinforc",
publisher = "Društvo građevinskih konstruktera Srbije, Beograd",
journal = "ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor",
title = "Long-term properties of green concrete: testing at the material and structural level",
pages = "227-218",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1631"
}

Tošić, N., Marinković, S., De Brito, J., Pecić, N.,& Ignjatović, I.. (2018). Long-term properties of green concrete: testing at the material and structural level. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
Društvo građevinskih konstruktera Srbije, Beograd., 218-227.
https://hdl.handle.net/21.15107/rcub_grafar_1631

Tošić N, Marinković S, De Brito J, Pecić N, Ignjatović I. Long-term properties of green concrete: testing at the material and structural level. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor. 2018;:218-227.
https://hdl.handle.net/21.15107/rcub_grafar_1631 .

Tošić, Nikola, Marinković, Snežana, De Brito, Jorge, Pecić, Nenad, Ignjatović, Ivan, "Long-term properties of green concrete: testing at the material and structural level" in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor (2018):218-227,
https://hdl.handle.net/21.15107/rcub_grafar_1631 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/939
AB  - Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.
PB  - Elsevier Ltd
T2  - Construction and Building Materials
T1  - Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete
EP  - 358
SP  - 344
VL  - 176
DO  - 10.1016/j.conbuildmat.2018.05.002
ER  - 

@article{
author = "Tošić, Nikola and Marinković, Snežana and Pecić, Nenad and Ignjatović, Ivan and Dragaš, Jelena",
year = "2018",
abstract = "Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.",
publisher = "Elsevier Ltd",
journal = "Construction and Building Materials",
title = "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete",
pages = "358-344",
volume = "176",
doi = "10.1016/j.conbuildmat.2018.05.002"
}

Tošić, N., Marinković, S., Pecić, N., Ignjatović, I.,& Dragaš, J.. (2018). Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials
Elsevier Ltd., 176, 344-358.
https://doi.org/10.1016/j.conbuildmat.2018.05.002

Tošić N, Marinković S, Pecić N, Ignjatović I, Dragaš J. Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials. 2018;176:344-358.
doi:10.1016/j.conbuildmat.2018.05.002 .

Tošić, Nikola, Marinković, Snežana, Pecić, Nenad, Ignjatović, Ivan, Dragaš, Jelena, "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete" in Construction and Building Materials, 176 (2018):344-358,
https://doi.org/10.1016/j.conbuildmat.2018.05.002 . .

TY  - JOUR
AU  - Pecić, Nenad
AU  - Mašović, Snežana
AU  - Stošić, Saša
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/860
AB  - Code provisions for a simplified check of the long-term deflection of concrete structures are generally developed for predefined values of the relevant input parameters. Deflection calculation may be of interest to account for different design situations. EN 1992-1-1 advocates the integration of curvatures calculated using the effective modulus of concrete. This paper presents an efficient procedure for calculation of the long-term deflection due to a sustained load. A nondimensional analysis of the mean curvature is applied to evaluate the deflection. The deflection is calculated using a set of algebraic expressions. The result is close to the value obtained by the numerical integration of curvatures. The values of relevant parameters in the expressions may be selected within the common range for the design of engineering structures. The efficiency of the deflection prediction based on the integration of curvatures is tested on the available experimental data. In the first approach, the measured material properties are used. In the second approach, the required values are derived from EN 1992-1-1 expressions to predict the material properties.
PB  - Wiley-Blackwell
T2  - Structural Concrete
T1  - Verification of deflection according to Eurocode 2
EP  - 849
IS  - 6
SP  - 839
VL  - 18
DO  - 10.1002/suco.201600234
ER  - 

@article{
author = "Pecić, Nenad and Mašović, Snežana and Stošić, Saša",
year = "2017",
abstract = "Code provisions for a simplified check of the long-term deflection of concrete structures are generally developed for predefined values of the relevant input parameters. Deflection calculation may be of interest to account for different design situations. EN 1992-1-1 advocates the integration of curvatures calculated using the effective modulus of concrete. This paper presents an efficient procedure for calculation of the long-term deflection due to a sustained load. A nondimensional analysis of the mean curvature is applied to evaluate the deflection. The deflection is calculated using a set of algebraic expressions. The result is close to the value obtained by the numerical integration of curvatures. The values of relevant parameters in the expressions may be selected within the common range for the design of engineering structures. The efficiency of the deflection prediction based on the integration of curvatures is tested on the available experimental data. In the first approach, the measured material properties are used. In the second approach, the required values are derived from EN 1992-1-1 expressions to predict the material properties.",
publisher = "Wiley-Blackwell",
journal = "Structural Concrete",
title = "Verification of deflection according to Eurocode 2",
pages = "849-839",
number = "6",
volume = "18",
doi = "10.1002/suco.201600234"
}

Pecić, N., Mašović, S.,& Stošić, S.. (2017). Verification of deflection according to Eurocode 2. in Structural Concrete
Wiley-Blackwell., 18(6), 839-849.
https://doi.org/10.1002/suco.201600234

Pecić N, Mašović S, Stošić S. Verification of deflection according to Eurocode 2. in Structural Concrete. 2017;18(6):839-849.
doi:10.1002/suco.201600234 .

Pecić, Nenad, Mašović, Snežana, Stošić, Saša, "Verification of deflection according to Eurocode 2" in Structural Concrete, 18, no. 6 (2017):839-849,
https://doi.org/10.1002/suco.201600234 . .

TY  - CONF
AU  - Pecić, Nenad
AU  - Milićević, Ivan
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1559
AB  - Eurocode 2 (EN 1992-1-1:2004) instructions for deflection control are discussed in the paper. Several problems arise with application of the span-to-depth limits. This procedure is not always applicable due to adopted pre-defined inputs and calculation of the deflections is necessary. The simplest procedure is to interpolate between deflections calculated using stiffness of the uncracked and the cracked member. This is an equivalent to the CEB bilinear method, but without explicit instruction for the interpolation coefficient. The most rigorous method of assessing deflections is based on the integration of the mean curvatures calculated at a number of cross sections along the member. This procedure may require additional adjustments in case of statically indeterminate structures.
PB  - MASE - Macedonian Association of Structural Engineers, Skopje
C3  - Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017
T1  - Deflection control of reinforced concrete elements according to Eurocode 2
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1559
ER  - 

@conference{
author = "Pecić, Nenad and Milićević, Ivan",
year = "2017",
abstract = "Eurocode 2 (EN 1992-1-1:2004) instructions for deflection control are discussed in the paper. Several problems arise with application of the span-to-depth limits. This procedure is not always applicable due to adopted pre-defined inputs and calculation of the deflections is necessary. The simplest procedure is to interpolate between deflections calculated using stiffness of the uncracked and the cracked member. This is an equivalent to the CEB bilinear method, but without explicit instruction for the interpolation coefficient. The most rigorous method of assessing deflections is based on the integration of the mean curvatures calculated at a number of cross sections along the member. This procedure may require additional adjustments in case of statically indeterminate structures.",
publisher = "MASE - Macedonian Association of Structural Engineers, Skopje",
journal = "Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017",
title = "Deflection control of reinforced concrete elements according to Eurocode 2",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1559"
}

Pecić, N.,& Milićević, I.. (2017). Deflection control of reinforced concrete elements according to Eurocode 2. in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017
MASE - Macedonian Association of Structural Engineers, Skopje..
https://hdl.handle.net/21.15107/rcub_grafar_1559

Pecić N, Milićević I. Deflection control of reinforced concrete elements according to Eurocode 2. in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017. 2017;.
https://hdl.handle.net/21.15107/rcub_grafar_1559 .

Pecić, Nenad, Milićević, Ivan, "Deflection control of reinforced concrete elements according to Eurocode 2" in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017 (2017),
https://hdl.handle.net/21.15107/rcub_grafar_1559 .

TY  - JOUR
AU  - Milićević, Ivan
AU  - Pecić, Nenad
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/840
AB  - This paper presents the procedure for calculation of creep coefficient and shrinkage strain according to Eurocode 2 (SRPS EN 1992-1-1:2004). The calculated values of final creep coefficient and shrinkage strain, for the usual design conditions, are given in Annexes. The influence of key parameters on final creep coefficient and shrinkage strain is analyzed and the comparison between their final values calculated according to Eurocode 2 and BAB 87 is presented.
AB  - U tekstu je prikazan postupak izračunanja vrednosti koeficijenta tečenja i dilatacije skupljanja prema Evrokodu 2 (SRPS EN 1992-1-1:2004). Izračunate vrednosti, za uobičajene proračunske uslove, su date u priloženim tabelama. Analiziran je uticaj pojedinih parametara na konačne vrednosti i urađeno poređenje vrednosti određenih prema Evrokodu 2 i PBAB 87.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Creep and shrinkage of concrete according to Eurocode 2
T1  - Deformacije tečenja i skupljanja betona prema Evrokodu 2
EP  - 663
IS  - 5
SP  - 655
VL  - 72
DO  - 10.5937/tehnika1705655M
ER  - 

@article{
author = "Milićević, Ivan and Pecić, Nenad",
year = "2017",
abstract = "This paper presents the procedure for calculation of creep coefficient and shrinkage strain according to Eurocode 2 (SRPS EN 1992-1-1:2004). The calculated values of final creep coefficient and shrinkage strain, for the usual design conditions, are given in Annexes. The influence of key parameters on final creep coefficient and shrinkage strain is analyzed and the comparison between their final values calculated according to Eurocode 2 and BAB 87 is presented., U tekstu je prikazan postupak izračunanja vrednosti koeficijenta tečenja i dilatacije skupljanja prema Evrokodu 2 (SRPS EN 1992-1-1:2004). Izračunate vrednosti, za uobičajene proračunske uslove, su date u priloženim tabelama. Analiziran je uticaj pojedinih parametara na konačne vrednosti i urađeno poređenje vrednosti određenih prema Evrokodu 2 i PBAB 87.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Creep and shrinkage of concrete according to Eurocode 2, Deformacije tečenja i skupljanja betona prema Evrokodu 2",
pages = "663-655",
number = "5",
volume = "72",
doi = "10.5937/tehnika1705655M"
}

Milićević, I.,& Pecić, N.. (2017). Creep and shrinkage of concrete according to Eurocode 2. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 72(5), 655-663.
https://doi.org/10.5937/tehnika1705655M

Milićević I, Pecić N. Creep and shrinkage of concrete according to Eurocode 2. in Tehnika. 2017;72(5):655-663.
doi:10.5937/tehnika1705655M .

Milićević, Ivan, Pecić, Nenad, "Creep and shrinkage of concrete according to Eurocode 2" in Tehnika, 72, no. 5 (2017):655-663,
https://doi.org/10.5937/tehnika1705655M . .

TY  - CONF
AU  - Pecić, Nenad
AU  - Mašović, Snežana
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1459
PB  - Društvo građevinskih konstruktera Srbije, Belgrade
C3  - Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor
T1  - Proračun prethodno napregnutih konstrukcija prema evrokodovima
EP  - 217
SP  - 208
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1459
ER  - 

@conference{
author = "Pecić, Nenad and Mašović, Snežana",
year = "2016",
publisher = "Društvo građevinskih konstruktera Srbije, Belgrade",
journal = "Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor",
title = "Proračun prethodno napregnutih konstrukcija prema evrokodovima",
pages = "217-208",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1459"
}

Pecić, N.,& Mašović, S.. (2016). Proračun prethodno napregnutih konstrukcija prema evrokodovima. in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor
Društvo građevinskih konstruktera Srbije, Belgrade., 208-217.
https://hdl.handle.net/21.15107/rcub_grafar_1459

Pecić N, Mašović S. Proračun prethodno napregnutih konstrukcija prema evrokodovima. in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor. 2016;:208-217.
https://hdl.handle.net/21.15107/rcub_grafar_1459 .

Pecić, Nenad, Mašović, Snežana, "Proračun prethodno napregnutih konstrukcija prema evrokodovima" in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor (2016):208-217,
https://hdl.handle.net/21.15107/rcub_grafar_1459 .

TY  - JOUR
AU  - Čokić, Miloš
AU  - Petronijević, Predrag
AU  - Todorović, Marija
AU  - Pecić, Nenad
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/658
AB  - This paper presents a comparative analysis of embodied energy and CO2 emission, in the construction process of three bridge structures. Analyzed structures are prestressed concrete bridges with different structural systems and a total length of 88 meters. The correlation of structural system, construction method, material quantities and embodied energy and CO2 emission were considered. Influence of the selected solutions in main steps of design and construction on the energy consumption and the emission of CO2 is presented. The results should provide a better understanding of the effects of certain factors, in the bridge construction process, and their impact on the environment.
AB  - U radu je prikazana uporedna analiza vezane energije i emisije CO2 u procesu gradnje, za tri mostovske konstrukcije. Analizirane konstrukcije su prethodno napregnuti betonski mostovi, različitih statičkih sistema, ukupne dužine 88 metara. Razmatrana je međusobna uslovljenost izbora konstruktivnih rešenja, načina izvođenja konstrukcije, količine utrošenog materijala, vezane energije i emisije CO2. Dat je uvid u način na koji se glavni koraci u projektovanju i izvođenju mostova odražavaju na energetski utrošak i emisiju CO2, procentualno i u ukupnom iznosu. Dobijeni rezultati bi trebalo da omoguće bolje sagledavanje uticaja pojedinih faktora u procesu izvođenja mostova i njihov uticaj na životnu sredinu.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
T2  - Građevinski materijali i konstrukcije
T1  - Analysis of the embodied energy and the CO2 emission in construction process of a bridge structure from the aspect of sustainability
T1  - Analiza vezane energije i emisije CO2 za izvođenje mostovske konstrukcije sa stanovišta održivosti
EP  - 20
IS  - 2
SP  - 3
VL  - 58
DO  - 10.5937/grmk1502003c
ER  - 

@article{
author = "Čokić, Miloš and Petronijević, Predrag and Todorović, Marija and Pecić, Nenad",
year = "2015",
abstract = "This paper presents a comparative analysis of embodied energy and CO2 emission, in the construction process of three bridge structures. Analyzed structures are prestressed concrete bridges with different structural systems and a total length of 88 meters. The correlation of structural system, construction method, material quantities and embodied energy and CO2 emission were considered. Influence of the selected solutions in main steps of design and construction on the energy consumption and the emission of CO2 is presented. The results should provide a better understanding of the effects of certain factors, in the bridge construction process, and their impact on the environment., U radu je prikazana uporedna analiza vezane energije i emisije CO2 u procesu gradnje, za tri mostovske konstrukcije. Analizirane konstrukcije su prethodno napregnuti betonski mostovi, različitih statičkih sistema, ukupne dužine 88 metara. Razmatrana je međusobna uslovljenost izbora konstruktivnih rešenja, načina izvođenja konstrukcije, količine utrošenog materijala, vezane energije i emisije CO2. Dat je uvid u način na koji se glavni koraci u projektovanju i izvođenju mostova odražavaju na energetski utrošak i emisiju CO2, procentualno i u ukupnom iznosu. Dobijeni rezultati bi trebalo da omoguće bolje sagledavanje uticaja pojedinih faktora u procesu izvođenja mostova i njihov uticaj na životnu sredinu.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Građevinski materijali i konstrukcije",
title = "Analysis of the embodied energy and the CO2 emission in construction process of a bridge structure from the aspect of sustainability, Analiza vezane energije i emisije CO2 za izvođenje mostovske konstrukcije sa stanovišta održivosti",
pages = "20-3",
number = "2",
volume = "58",
doi = "10.5937/grmk1502003c"
}

Čokić, M., Petronijević, P., Todorović, M.,& Pecić, N.. (2015). Analysis of the embodied energy and the CO2 emission in construction process of a bridge structure from the aspect of sustainability. in Građevinski materijali i konstrukcije
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 58(2), 3-20.
https://doi.org/10.5937/grmk1502003c

Čokić M, Petronijević P, Todorović M, Pecić N. Analysis of the embodied energy and the CO2 emission in construction process of a bridge structure from the aspect of sustainability. in Građevinski materijali i konstrukcije. 2015;58(2):3-20.
doi:10.5937/grmk1502003c .

Čokić, Miloš, Petronijević, Predrag, Todorović, Marija, Pecić, Nenad, "Analysis of the embodied energy and the CO2 emission in construction process of a bridge structure from the aspect of sustainability" in Građevinski materijali i konstrukcije, 58, no. 2 (2015):3-20,
https://doi.org/10.5937/grmk1502003c . .

TY  - JOUR
AU  - Mašović, Snežana
AU  - Stošić, Saša
AU  - Pecić, Nenad
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1014
T2  - TTEM journal / Tecnics Technologies Education Management
T1  - Long-term behavior of continuous girders made from precast elements
EP  - 293
IS  - 2
SP  - 288
VL  - 9
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1014
ER  - 

@article{
author = "Mašović, Snežana and Stošić, Saša and Pecić, Nenad",
year = "2014",
journal = "TTEM journal / Tecnics Technologies Education Management",
title = "Long-term behavior of continuous girders made from precast elements",
pages = "293-288",
number = "2",
volume = "9",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1014"
}

Mašović, S., Stošić, S.,& Pecić, N.. (2014). Long-term behavior of continuous girders made from precast elements. in TTEM journal / Tecnics Technologies Education Management, 9(2), 288-293.
https://hdl.handle.net/21.15107/rcub_grafar_1014

Mašović S, Stošić S, Pecić N. Long-term behavior of continuous girders made from precast elements. in TTEM journal / Tecnics Technologies Education Management. 2014;9(2):288-293.
https://hdl.handle.net/21.15107/rcub_grafar_1014 .

Mašović, Snežana, Stošić, Saša, Pecić, Nenad, "Long-term behavior of continuous girders made from precast elements" in TTEM journal / Tecnics Technologies Education Management, 9, no. 2 (2014):288-293,
https://hdl.handle.net/21.15107/rcub_grafar_1014 .

TY  - JOUR
AU  - Mašović, Snežana
AU  - Stošić, Saša
AU  - Pecić, Nenad
PY  - 2014
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/607
AB  - Despite the extensive analytical and numerical research carried out in the last two decades on the long-term behaviour of continuous concrete beams composed of precast units, only limited number of experimental data is currently available in the literature. This paper presents an experimental study of the time-dependent behaviour of continuous concrete beams that has been carried out at the University of Belgrade. Two beams were made of precast reinforced elements with cast in situ upper part and continuity joint at middle support. Two cast in place continuous beams of same span and load were also tested. All beams were subjected to equal sustained load for a period over 4 years and deflections, strains and reactions were measured. Experimental program is described and the results are presented. The experiment was also analytically simulated. Analysis of this type of structure should incorporate effects of creep, shrinkage and cracking of concrete. Simplified procedure that involves the AAEM method and the bilinear approach is proposed for calculation of the restraint moment. Calculated values obtained using measured concrete properties are close to the experimental values. Experimental results presented in the paper offer data for calibration of more complex theoretical procedures.
PB  - Elsevier BV
T2  - Engineering Structures
T1  - Research of long-term behaviour of non-prestressed precast concrete beams made continuous
EP  - 22
SP  - 11
VL  - 70
DO  - 10.1016/j.engstruct.2014.03.022
ER  - 

@article{
author = "Mašović, Snežana and Stošić, Saša and Pecić, Nenad",
year = "2014",
abstract = "Despite the extensive analytical and numerical research carried out in the last two decades on the long-term behaviour of continuous concrete beams composed of precast units, only limited number of experimental data is currently available in the literature. This paper presents an experimental study of the time-dependent behaviour of continuous concrete beams that has been carried out at the University of Belgrade. Two beams were made of precast reinforced elements with cast in situ upper part and continuity joint at middle support. Two cast in place continuous beams of same span and load were also tested. All beams were subjected to equal sustained load for a period over 4 years and deflections, strains and reactions were measured. Experimental program is described and the results are presented. The experiment was also analytically simulated. Analysis of this type of structure should incorporate effects of creep, shrinkage and cracking of concrete. Simplified procedure that involves the AAEM method and the bilinear approach is proposed for calculation of the restraint moment. Calculated values obtained using measured concrete properties are close to the experimental values. Experimental results presented in the paper offer data for calibration of more complex theoretical procedures.",
publisher = "Elsevier BV",
journal = "Engineering Structures",
title = "Research of long-term behaviour of non-prestressed precast concrete beams made continuous",
pages = "22-11",
volume = "70",
doi = "10.1016/j.engstruct.2014.03.022"
}

Mašović, S., Stošić, S.,& Pecić, N.. (2014). Research of long-term behaviour of non-prestressed precast concrete beams made continuous. in Engineering Structures
Elsevier BV., 70, 11-22.
https://doi.org/10.1016/j.engstruct.2014.03.022

Mašović S, Stošić S, Pecić N. Research of long-term behaviour of non-prestressed precast concrete beams made continuous. in Engineering Structures. 2014;70:11-22.
doi:10.1016/j.engstruct.2014.03.022 .

Mašović, Snežana, Stošić, Saša, Pecić, Nenad, "Research of long-term behaviour of non-prestressed precast concrete beams made continuous" in Engineering Structures, 70 (2014):11-22,
https://doi.org/10.1016/j.engstruct.2014.03.022 . .

TY  - THES
AU  - Pecić, Nenad P.
PY  - 2013
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=617
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:6796/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=513284754
UR  - http://nardus.mpn.gov.rs/123456789/2192
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1686
AB  - Напредак у развоју алата за пројектовање грађевонских конструкција није пратила одговарајуће подршка у области провере деформација армирано-бетонских елемената...
AB  - Development of design tools for reinforced concrete is not followed withconvenient procedures for the deflection check. Most of the software using finiteelement calculation does not support proper evaluation (including effects of cracking,creep and shrinkage) of the deflection of concrete structures. Use of high strengthmaterials enables reduction of the size of structural elements. As a result, structuresbecome more deformable and it is necessary to check deflection.Simplified and refined methods are usually presented by most of design codes orrecommendations for the deflection check. The simplified methods provide faster andeasier calculation. They are generally on the safe side and require enlarged dimensionsof structural elements. The refined methods involve relevant properties of concrete,environmental conditions and construction schedule, allowing for optimization of thesize of structural elements. Apart from not being suitable for hand calculation, theyoften require some additional knowledge.Eurocode 2 (EN 1992-1-1:2004) also provides two methods for the deflectioncheck. Simplified criterion is in a form of span-to-depth ratio limit. This tool has seriouslimits. It is not well prepared for practical use (it is derived for an unsuitable ratio of thequasi-permanent to the ultimate load; it also does not include the compressivereinforcement other then required for ULS). The second, rigorous method is based ongeneral approach for deflection calculation - integration of the curvatures along theelement. The effective modulus method is used for calculation of long-term effects dueto creep and shrinkage of concrete. Influence of concrete cracking to the stiffness isintroduced by interpolation coefficient according to CEB-FIP Model code 1990. Thismore refined method seems to be easy applicable due to lack of the very importantinstruction: bending moment diagram of the statically indeterminate structures, resultingfrom an ordinary ULS analysis based on concrete gross sections, should be redistributedto account for effects of cracking, creep and shrinkage. This option is not usuallysupported by common engineering software and task becomes heavy. Evaluation of theredistributed diagram requires a time-dependant stiffness matrix and an iterativecalculation following appearance of cracks...
PB  - Универзитет у Београду, Грађевински факултет
T2  - Универзитет у Београду
T1  - Унапређење методологије контроле угиба армиранобетонских конструкција
T1  - Improved method for deflection control of reinforced concrete structures
UR  - https://hdl.handle.net/21.15107/rcub_nardus_2192
ER  - 

@phdthesis{
author = "Pecić, Nenad P.",
year = "2013",
abstract = "Напредак у развоју алата за пројектовање грађевонских конструкција није пратила одговарајуће подршка у области провере деформација армирано-бетонских елемената..., Development of design tools for reinforced concrete is not followed withconvenient procedures for the deflection check. Most of the software using finiteelement calculation does not support proper evaluation (including effects of cracking,creep and shrinkage) of the deflection of concrete structures. Use of high strengthmaterials enables reduction of the size of structural elements. As a result, structuresbecome more deformable and it is necessary to check deflection.Simplified and refined methods are usually presented by most of design codes orrecommendations for the deflection check. The simplified methods provide faster andeasier calculation. They are generally on the safe side and require enlarged dimensionsof structural elements. The refined methods involve relevant properties of concrete,environmental conditions and construction schedule, allowing for optimization of thesize of structural elements. Apart from not being suitable for hand calculation, theyoften require some additional knowledge.Eurocode 2 (EN 1992-1-1:2004) also provides two methods for the deflectioncheck. Simplified criterion is in a form of span-to-depth ratio limit. This tool has seriouslimits. It is not well prepared for practical use (it is derived for an unsuitable ratio of thequasi-permanent to the ultimate load; it also does not include the compressivereinforcement other then required for ULS). The second, rigorous method is based ongeneral approach for deflection calculation - integration of the curvatures along theelement. The effective modulus method is used for calculation of long-term effects dueto creep and shrinkage of concrete. Influence of concrete cracking to the stiffness isintroduced by interpolation coefficient according to CEB-FIP Model code 1990. Thismore refined method seems to be easy applicable due to lack of the very importantinstruction: bending moment diagram of the statically indeterminate structures, resultingfrom an ordinary ULS analysis based on concrete gross sections, should be redistributedto account for effects of cracking, creep and shrinkage. This option is not usuallysupported by common engineering software and task becomes heavy. Evaluation of theredistributed diagram requires a time-dependant stiffness matrix and an iterativecalculation following appearance of cracks...",
publisher = "Универзитет у Београду, Грађевински факултет",
journal = "Универзитет у Београду",
title = "Унапређење методологије контроле угиба армиранобетонских конструкција, Improved method for deflection control of reinforced concrete structures",
url = "https://hdl.handle.net/21.15107/rcub_nardus_2192"
}

Pecić, N. P.. (2013). Унапређење методологије контроле угиба армиранобетонских конструкција. in Универзитет у Београду
Универзитет у Београду, Грађевински факултет..
https://hdl.handle.net/21.15107/rcub_nardus_2192

Pecić NP. Унапређење методологије контроле угиба армиранобетонских конструкција. in Универзитет у Београду. 2013;.
https://hdl.handle.net/21.15107/rcub_nardus_2192 .

Pecić, Nenad P., "Унапређење методологије контроле угиба армиранобетонских конструкција" in Универзитет у Београду (2013),
https://hdl.handle.net/21.15107/rcub_nardus_2192 .

TY  - JOUR
AU  - Mašović, Snežana
AU  - Stošić, Saša
AU  - Pecić, Nenad
PY  - 2011
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/401
AB  - Research on the long-term behavior of composite concrete girders made continuous is presented in the paper. Concrete precast element is cracked under construction load. Creep and differential shrinkage of precast and in-situ cast part of the girder also induce stresses in a structure. The subject of this investigation is redistribution of section forces in course of time for concrete girders subjected to change of the structural system. The aim of investigation is to verify design models and analytical procedures by experimental research.
AB  - U radu je prikazano istraživanje ponašanja naknadno kontinuiranih betonskih konstrukcija, sa naglaskom na deformacije betona zavisne od vremena. Promena statičkog sistema tokom izvođenja, dovodi i do preraspodele statičkih uticaja u sistemu, tako da konačno stanje nije prost zbir faza kroz koje konstrukcija prolazi. Pored skupljanja i tečenja betona pod stalnim opterećenjem, pojava prslina utiče na razvoj napona i deformacija kroz vreme. Osim eksperimentalnog istraživanja, u radu je prikazana i numerička analiza primenom programskog paketa DIANA za nelinearnu analizu konstrukcija. Cilj prikazanog istraživanja je identifikacija najznačajnijih parametara za ponašanje konstrukcije tokom vremena i verifikacija proračunskih modela.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Architecture and Civil Engineering
T1  - Redistribution of internal forces in composite concrete girders made continuous vs. time
T1  - Preraspodela uticaja kod naknadno kontinuiranih spregnutih armiranobetonskih nosača tokom vremena
EP  - 159
IS  - 1
SP  - 147
VL  - 9
DO  - 10.2298/FUACE1101147M
ER  - 

@article{
author = "Mašović, Snežana and Stošić, Saša and Pecić, Nenad",
year = "2011",
abstract = "Research on the long-term behavior of composite concrete girders made continuous is presented in the paper. Concrete precast element is cracked under construction load. Creep and differential shrinkage of precast and in-situ cast part of the girder also induce stresses in a structure. The subject of this investigation is redistribution of section forces in course of time for concrete girders subjected to change of the structural system. The aim of investigation is to verify design models and analytical procedures by experimental research., U radu je prikazano istraživanje ponašanja naknadno kontinuiranih betonskih konstrukcija, sa naglaskom na deformacije betona zavisne od vremena. Promena statičkog sistema tokom izvođenja, dovodi i do preraspodele statičkih uticaja u sistemu, tako da konačno stanje nije prost zbir faza kroz koje konstrukcija prolazi. Pored skupljanja i tečenja betona pod stalnim opterećenjem, pojava prslina utiče na razvoj napona i deformacija kroz vreme. Osim eksperimentalnog istraživanja, u radu je prikazana i numerička analiza primenom programskog paketa DIANA za nelinearnu analizu konstrukcija. Cilj prikazanog istraživanja je identifikacija najznačajnijih parametara za ponašanje konstrukcije tokom vremena i verifikacija proračunskih modela.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Architecture and Civil Engineering",
title = "Redistribution of internal forces in composite concrete girders made continuous vs. time, Preraspodela uticaja kod naknadno kontinuiranih spregnutih armiranobetonskih nosača tokom vremena",
pages = "159-147",
number = "1",
volume = "9",
doi = "10.2298/FUACE1101147M"
}

Mašović, S., Stošić, S.,& Pecić, N.. (2011). Redistribution of internal forces in composite concrete girders made continuous vs. time. in Facta universitatis - series: Architecture and Civil Engineering
Univerzitet u Nišu, Niš., 9(1), 147-159.
https://doi.org/10.2298/FUACE1101147M

Mašović S, Stošić S, Pecić N. Redistribution of internal forces in composite concrete girders made continuous vs. time. in Facta universitatis - series: Architecture and Civil Engineering. 2011;9(1):147-159.
doi:10.2298/FUACE1101147M .

Mašović, Snežana, Stošić, Saša, Pecić, Nenad, "Redistribution of internal forces in composite concrete girders made continuous vs. time" in Facta universitatis - series: Architecture and Civil Engineering, 9, no. 1 (2011):147-159,
https://doi.org/10.2298/FUACE1101147M . .