TY  - JOUR
AU  - Lelović, Selimir
AU  - Stojić, Dragoslav
AU  - Vasović, Dejan
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1118
AB  - This paper presents determination of the Mohr-Coulomb material parameters for concrete under indirect tensile testing, design of experiments and numerical simulations. Experiments are designed to control input variables associated with inhomogeneous starting material, sample preparation and testing equipment. Statistical analysis of the experimental data is applied in order to correlate material's deformational behaviour with change in cement content. Presented paper discusses a simple method, based on experimental and theoretical framework, to determine two material parameters for concrete: cohesion (c) and angle of internal friction (φ) from indirect tensile test. Cohesion is obtained from experimental results using elastic and plastic theory of concrete deformation. Prandtl's theory is applied to obtain the angle of internal friction from measured bearing capacity and cohesion. Numerical analysis by finite-element method is used for verification of experimental results, employing step-by-step integration procedure for solving the boundary value problem.
T2  - Tehnički vjesnik
T1  - Determination of the Mohr-Coulomb Material Parameters for Concrete under Indirect Tensile Test
IS  - 2
VL  - 26
DO  - 10.17559/TV-20180612090311
ER  - 

@article{
author = "Lelović, Selimir and Stojić, Dragoslav and Vasović, Dejan",
year = "2019",
abstract = "This paper presents determination of the Mohr-Coulomb material parameters for concrete under indirect tensile testing, design of experiments and numerical simulations. Experiments are designed to control input variables associated with inhomogeneous starting material, sample preparation and testing equipment. Statistical analysis of the experimental data is applied in order to correlate material's deformational behaviour with change in cement content. Presented paper discusses a simple method, based on experimental and theoretical framework, to determine two material parameters for concrete: cohesion (c) and angle of internal friction (φ) from indirect tensile test. Cohesion is obtained from experimental results using elastic and plastic theory of concrete deformation. Prandtl's theory is applied to obtain the angle of internal friction from measured bearing capacity and cohesion. Numerical analysis by finite-element method is used for verification of experimental results, employing step-by-step integration procedure for solving the boundary value problem.",
journal = "Tehnički vjesnik",
title = "Determination of the Mohr-Coulomb Material Parameters for Concrete under Indirect Tensile Test",
number = "2",
volume = "26",
doi = "10.17559/TV-20180612090311"
}

Lelović, S., Stojić, D.,& Vasović, D.. (2019). Determination of the Mohr-Coulomb Material Parameters for Concrete under Indirect Tensile Test. in Tehnički vjesnik, 26(2).
https://doi.org/10.17559/TV-20180612090311

Lelović S, Stojić D, Vasović D. Determination of the Mohr-Coulomb Material Parameters for Concrete under Indirect Tensile Test. in Tehnički vjesnik. 2019;26(2).
doi:10.17559/TV-20180612090311 .

Lelović, Selimir, Stojić, Dragoslav, Vasović, Dejan, "Determination of the Mohr-Coulomb Material Parameters for Concrete under Indirect Tensile Test" in Tehnički vjesnik, 26, no. 2 (2019),
https://doi.org/10.17559/TV-20180612090311 . .

TY  - JOUR
AU  - Stojić, Dragoslav
AU  - Nestorović, Tamara
AU  - Marković, Nemanja
AU  - Marjanović, Miroslav
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/941
AB  - This paper presents an experimental-numerical analysis of damage localization of concrete plate-like elements on the basis of hybrid approach. The proposed hybrid approach uses the fast discrete wavelet transform, energy approach, and time of flight criterion for the purpose of localization of single and multidamage problems inside or on the periphery of concrete elements. Verification of the proposed damage localization approach has been performed under laboratory conditions using a laser scanning-based system with piezoelectric excitation of the wave propagation. Numerical simulation of the wave propagation is performed using the explicit finite element method using 3D models with linear-elastic material model of concrete with Rayleigh damping. The Rayleigh damping coefficients are determined on the basis of experimental data and implemented in numerical models. Validation of the numerical model is conducted, based on the comparison with sensor output signals obtained through experimental measuring and a very good agreement of results is obtained. The proposed hybrid approach to damage localization is verified using 15 different models/specimens, varying the number, shape (circular or notched), and position of damage, as well as the number and placement of actuators/sensors. For all the analyzed scenarios, the hybrid approach successfully localized the damage even for the least number of used sensor positions. In the models with the circular damage, the damage image created on the basis of the hybrid approach is almost identical to the actual shape of the damage, indicating a good potential of the method for damage localization.
PB  - John Wiley and Sons Ltd
T2  - Structural Control & Health Monitoring
T1  - Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach
IS  - 9
VL  - 25
DO  - 10.1002/stc.2214
ER  - 

@article{
author = "Stojić, Dragoslav and Nestorović, Tamara and Marković, Nemanja and Marjanović, Miroslav",
year = "2018",
abstract = "This paper presents an experimental-numerical analysis of damage localization of concrete plate-like elements on the basis of hybrid approach. The proposed hybrid approach uses the fast discrete wavelet transform, energy approach, and time of flight criterion for the purpose of localization of single and multidamage problems inside or on the periphery of concrete elements. Verification of the proposed damage localization approach has been performed under laboratory conditions using a laser scanning-based system with piezoelectric excitation of the wave propagation. Numerical simulation of the wave propagation is performed using the explicit finite element method using 3D models with linear-elastic material model of concrete with Rayleigh damping. The Rayleigh damping coefficients are determined on the basis of experimental data and implemented in numerical models. Validation of the numerical model is conducted, based on the comparison with sensor output signals obtained through experimental measuring and a very good agreement of results is obtained. The proposed hybrid approach to damage localization is verified using 15 different models/specimens, varying the number, shape (circular or notched), and position of damage, as well as the number and placement of actuators/sensors. For all the analyzed scenarios, the hybrid approach successfully localized the damage even for the least number of used sensor positions. In the models with the circular damage, the damage image created on the basis of the hybrid approach is almost identical to the actual shape of the damage, indicating a good potential of the method for damage localization.",
publisher = "John Wiley and Sons Ltd",
journal = "Structural Control & Health Monitoring",
title = "Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach",
number = "9",
volume = "25",
doi = "10.1002/stc.2214"
}

Stojić, D., Nestorović, T., Marković, N.,& Marjanović, M.. (2018). Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach. in Structural Control & Health Monitoring
John Wiley and Sons Ltd., 25(9).
https://doi.org/10.1002/stc.2214

Stojić D, Nestorović T, Marković N, Marjanović M. Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach. in Structural Control & Health Monitoring. 2018;25(9).
doi:10.1002/stc.2214 .

Stojić, Dragoslav, Nestorović, Tamara, Marković, Nemanja, Marjanović, Miroslav, "Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach" in Structural Control & Health Monitoring, 25, no. 9 (2018),
https://doi.org/10.1002/stc.2214 . .

TY  - JOUR
AU  - Marković, Nemanja
AU  - Nestorović, Tamara
AU  - Stojić, Dragoslav
AU  - Marjanović, Miroslav
AU  - Stojković, Nenad
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/870
AB  - In the paper, a novel approach for damage localization in reinforced concrete plates, based on the computational analysis of piezoelectric smart aggregates, has been presented. The hybrid approach for damage localization is based on two criteria: wave propagation energy and time of flight. The comprehensive numerical analysis using standard and explicit finite element method has been conducted. In addition, the proposed algorithm of the hybrid method has been coded in MATLAB. The approach has been verified numerically using different square reinforced concrete plate models, considering different number, position and size of damage, as well as different number and position of the piezoelectric smart aggregates. Obtained results confirm the successful application of the novel approach to the damage localization.
PB  - Elsevier Ltd
T2  - Mechanics Research Communications
T1  - Hybrid approach for two dimensional damage localization using piezoelectric smart aggregates
EP  - 75
SP  - 69
VL  - 85
DO  - 10.1016/j.mechrescom.2017.08.011
ER  - 

@article{
author = "Marković, Nemanja and Nestorović, Tamara and Stojić, Dragoslav and Marjanović, Miroslav and Stojković, Nenad",
year = "2017",
abstract = "In the paper, a novel approach for damage localization in reinforced concrete plates, based on the computational analysis of piezoelectric smart aggregates, has been presented. The hybrid approach for damage localization is based on two criteria: wave propagation energy and time of flight. The comprehensive numerical analysis using standard and explicit finite element method has been conducted. In addition, the proposed algorithm of the hybrid method has been coded in MATLAB. The approach has been verified numerically using different square reinforced concrete plate models, considering different number, position and size of damage, as well as different number and position of the piezoelectric smart aggregates. Obtained results confirm the successful application of the novel approach to the damage localization.",
publisher = "Elsevier Ltd",
journal = "Mechanics Research Communications",
title = "Hybrid approach for two dimensional damage localization using piezoelectric smart aggregates",
pages = "75-69",
volume = "85",
doi = "10.1016/j.mechrescom.2017.08.011"
}

Marković, N., Nestorović, T., Stojić, D., Marjanović, M.,& Stojković, N.. (2017). Hybrid approach for two dimensional damage localization using piezoelectric smart aggregates. in Mechanics Research Communications
Elsevier Ltd., 85, 69-75.
https://doi.org/10.1016/j.mechrescom.2017.08.011

Marković N, Nestorović T, Stojić D, Marjanović M, Stojković N. Hybrid approach for two dimensional damage localization using piezoelectric smart aggregates. in Mechanics Research Communications. 2017;85:69-75.
doi:10.1016/j.mechrescom.2017.08.011 .

Marković, Nemanja, Nestorović, Tamara, Stojić, Dragoslav, Marjanović, Miroslav, Stojković, Nenad, "Hybrid approach for two dimensional damage localization using piezoelectric smart aggregates" in Mechanics Research Communications, 85 (2017):69-75,
https://doi.org/10.1016/j.mechrescom.2017.08.011 . .

TY  - CONF
AU  - Cvetković, Radovan
AU  - Stojić, Dragoslav
AU  - Stevanović, Boško
AU  - Ranković, S.
AU  - Marković, N.
AU  - Conić, S.
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1401
PB  - Društvo građevinskih konstruktera Srbije, Beograd
C3  - Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor
T1  - Računska analiza nekih metoda sprezanja drveta i betona
EP  - 526
SP  - 517
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1401
ER  - 

@conference{
author = "Cvetković, Radovan and Stojić, Dragoslav and Stevanović, Boško and Ranković, S. and Marković, N. and Conić, S.",
year = "2016",
publisher = "Društvo građevinskih konstruktera Srbije, Beograd",
journal = "Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor",
title = "Računska analiza nekih metoda sprezanja drveta i betona",
pages = "526-517",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1401"
}

Cvetković, R., Stojić, D., Stevanović, B., Ranković, S., Marković, N.,& Conić, S.. (2016). Računska analiza nekih metoda sprezanja drveta i betona. in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor
Društvo građevinskih konstruktera Srbije, Beograd., 517-526.
https://hdl.handle.net/21.15107/rcub_grafar_1401

Cvetković R, Stojić D, Stevanović B, Ranković S, Marković N, Conić S. Računska analiza nekih metoda sprezanja drveta i betona. in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor. 2016;:517-526.
https://hdl.handle.net/21.15107/rcub_grafar_1401 .

Cvetković, Radovan, Stojić, Dragoslav, Stevanović, Boško, Ranković, S., Marković, N., Conić, S., "Računska analiza nekih metoda sprezanja drveta i betona" in Zbornik radova / Društvо građevinskih konstruktera Srbije, Simpozijum 2016, 15-17. septembar, Zlatibor (2016):517-526,
https://hdl.handle.net/21.15107/rcub_grafar_1401 .

TY  - JOUR
AU  - Stojić, Dragoslav
AU  - Stevanović, Boško
AU  - Kočetov, Tatjana
AU  - Cvetković, Radovan
PY  - 2003
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/41
AB  - Introductory part of this paper shows a brief review of design concept of timber structures, according to Ultimate Limit States and Serviceability Limit States, specially in accordance with Eurocode 5 draft (Design timber structures, part 1.1 "General rules and rules for buildings). In what follows, design of some structural elements according to our standards in use established on allowable stress design concept and to EC 5, is illustrated by numerical examples which in the best way show differences between these two concepts.
AB  - U uvodnom delu ovog rada dat je kratki prikaz koncepta proračuna drvenih konstrukcija prema graničnim stanjima nosivosti i graničnim stanjima upotrebljivosti i to prema nacrtu evropskih propisa, tj. prema Evrokodu 5 (Proračun drvenih konstrukcija, deo 1.1: Opsta pravila i pravila za proračun zgrada). U nastavku, preko prikazanog brojnog primera, dat je konkretan proračun određenih konstrukcijskih elemenata prema Evrokodu 5 i prema našoj važećoj regulativi, odnosno konceptu proračuna na osnovu dopuštenih napona materijala, sto na najbolji način ilustruje razlike između jednog i drugog koncepta.
PB  - Univerzitet u Nišu - Građevinsko-arhitektonski fakultet, Niš
T2  - Nauka + Praksa
T1  - Proračun konstrukcija velikih raspona od lepljenog lameliranog drveta prema graničnim stanjima
EP  - 29
IS  - 6
SP  - 24
UR  - https://hdl.handle.net/21.15107/rcub_grafar_41
ER  - 

@article{
author = "Stojić, Dragoslav and Stevanović, Boško and Kočetov, Tatjana and Cvetković, Radovan",
year = "2003",
abstract = "Introductory part of this paper shows a brief review of design concept of timber structures, according to Ultimate Limit States and Serviceability Limit States, specially in accordance with Eurocode 5 draft (Design timber structures, part 1.1 "General rules and rules for buildings). In what follows, design of some structural elements according to our standards in use established on allowable stress design concept and to EC 5, is illustrated by numerical examples which in the best way show differences between these two concepts., U uvodnom delu ovog rada dat je kratki prikaz koncepta proračuna drvenih konstrukcija prema graničnim stanjima nosivosti i graničnim stanjima upotrebljivosti i to prema nacrtu evropskih propisa, tj. prema Evrokodu 5 (Proračun drvenih konstrukcija, deo 1.1: Opsta pravila i pravila za proračun zgrada). U nastavku, preko prikazanog brojnog primera, dat je konkretan proračun određenih konstrukcijskih elemenata prema Evrokodu 5 i prema našoj važećoj regulativi, odnosno konceptu proračuna na osnovu dopuštenih napona materijala, sto na najbolji način ilustruje razlike između jednog i drugog koncepta.",
publisher = "Univerzitet u Nišu - Građevinsko-arhitektonski fakultet, Niš",
journal = "Nauka + Praksa",
title = "Proračun konstrukcija velikih raspona od lepljenog lameliranog drveta prema graničnim stanjima",
pages = "29-24",
number = "6",
url = "https://hdl.handle.net/21.15107/rcub_grafar_41"
}

Stojić, D., Stevanović, B., Kočetov, T.,& Cvetković, R.. (2003). Proračun konstrukcija velikih raspona od lepljenog lameliranog drveta prema graničnim stanjima. in Nauka + Praksa
Univerzitet u Nišu - Građevinsko-arhitektonski fakultet, Niš.(6), 24-29.
https://hdl.handle.net/21.15107/rcub_grafar_41

Stojić D, Stevanović B, Kočetov T, Cvetković R. Proračun konstrukcija velikih raspona od lepljenog lameliranog drveta prema graničnim stanjima. in Nauka + Praksa. 2003;(6):24-29.
https://hdl.handle.net/21.15107/rcub_grafar_41 .

Stojić, Dragoslav, Stevanović, Boško, Kočetov, Tatjana, Cvetković, Radovan, "Proračun konstrukcija velikih raspona od lepljenog lameliranog drveta prema graničnim stanjima" in Nauka + Praksa, no. 6 (2003):24-29,
https://hdl.handle.net/21.15107/rcub_grafar_41 .