TY  - JOUR
AU  - Marković, Nemanja
AU  - Marjanović, Miroslav
AU  - Cvetković, Radovan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2674
AB  - There is a growing research and production interest for the application of lower-cost
hybrid cross-laminated timber (CLT) panels composed of timber layers of dissimilar quality.
Therefore, an approach for the design of cost-effective hybrid CLT panels in bending, based
on the existing analytical and novel finite element procedures, is presented in the paper.
The gamma-method, the extended gamma method, and the composite theory are applied
in the analysis of square panels, while the finite element model based on the Reddy’s
full layerwise theory is used for the complex-shape panels in bending. An extensive
benchmark technical and economic study is performed for 25 CLT panels, considering
various spans, lamination schemes, geometries, and boundary conditions. Cost savings
made by using a lower timber class in central zones of CLT panels are highlighted and
quantified. This concept shows an economic potential that should be considered during
the design and production of CLT panels in structural engineering applications, such as
lightweight floor structures.
PB  - Croatian Association of Civil Engineers
T2  - Gradjevinar
T1  - Design approach for cost-effective hybrid CLT floors
EP  - 311
IS  - 4
SP  - 301
VL  - 74
DO  - 10.14256/JCE.3271.2021
ER  - 

@article{
author = "Marković, Nemanja and Marjanović, Miroslav and Cvetković, Radovan",
year = "2022",
abstract = "There is a growing research and production interest for the application of lower-cost
hybrid cross-laminated timber (CLT) panels composed of timber layers of dissimilar quality.
Therefore, an approach for the design of cost-effective hybrid CLT panels in bending, based
on the existing analytical and novel finite element procedures, is presented in the paper.
The gamma-method, the extended gamma method, and the composite theory are applied
in the analysis of square panels, while the finite element model based on the Reddy’s
full layerwise theory is used for the complex-shape panels in bending. An extensive
benchmark technical and economic study is performed for 25 CLT panels, considering
various spans, lamination schemes, geometries, and boundary conditions. Cost savings
made by using a lower timber class in central zones of CLT panels are highlighted and
quantified. This concept shows an economic potential that should be considered during
the design and production of CLT panels in structural engineering applications, such as
lightweight floor structures.",
publisher = "Croatian Association of Civil Engineers",
journal = "Gradjevinar",
title = "Design approach for cost-effective hybrid CLT floors",
pages = "311-301",
number = "4",
volume = "74",
doi = "10.14256/JCE.3271.2021"
}

Marković, N., Marjanović, M.,& Cvetković, R.. (2022). Design approach for cost-effective hybrid CLT floors. in Gradjevinar
Croatian Association of Civil Engineers., 74(4), 301-311.
https://doi.org/10.14256/JCE.3271.2021

Marković N, Marjanović M, Cvetković R. Design approach for cost-effective hybrid CLT floors. in Gradjevinar. 2022;74(4):301-311.
doi:10.14256/JCE.3271.2021 .

Marković, Nemanja, Marjanović, Miroslav, Cvetković, Radovan, "Design approach for cost-effective hybrid CLT floors" in Gradjevinar, 74, no. 4 (2022):301-311,
https://doi.org/10.14256/JCE.3271.2021 . .

TY  - JOUR
AU  - Marjanović, Miroslav
AU  - Marković, Nemanja
AU  - Damnjanović, Emilija
AU  - Cvetković, Radovan
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2075
AB  - Cross-laminated timber (CLT) panels have an increasing market share and extensive application in civil engineering, as full size walls or light floor structures. Due to their low environmental impact, excellent thermal characteristics and high mechanical performance, they are being extensively applied instead of conventional mineral-based building materials. The thick and orthogonal structure of CLT provides the considerable stiffness with the low weight and makes such panels particularly suitable in seismic-prone areas. The ease of assembly allows prefabrication and reduces construction time and cost.
Current models for calculating the stress-deformation state of a CLT loaded out-of-plane mainly emerged from the long tradition of using very simple one-dimensional (beam-like) elements in timber structures. The paper tends to overcome some limitations of the current models by using the full-layerwise plate theory (FLWT) of Reddy, serving as a basis for the implementation of layered finite elements. The proposed model accounts for the complex 3D stress state in CLT loaded out-of-plane and implies an original procedure for stress calculation. It is implemented using the original object-oriented MATLAB framework, while the graphical user interface for pre- and post-processing is developed using GiD.
The presented approach is validated using the available numerical and experimental data in the literature, and compared against the commonly used methods for the design of CLT. Finally, the 3D stress-deformation state in the CLT slab of complex shape (commonly used in building structures) is obtained using the FLWT-based finite elements. The results are validated against the numerical data from the commercial software, and then used for checking of the ultimate and serviceability limit states for CLT slab according to Eurocode 5. Excellent agreement of the obtained results confirmed the potential of the proposed model to become a promising tool for engineering design of CLT slabs of arbitrary geometry.
PB  - Elsevier
T2  - Thin-Walled Structures
T1  - Three-dimensional stress analysis and design of cross-laminated timber panels using full-layerwise-theory-based finite element method
SP  - 107156
VL  - 157
DO  - 10.1016/j.tws.2020.107156
ER  - 

@article{
author = "Marjanović, Miroslav and Marković, Nemanja and Damnjanović, Emilija and Cvetković, Radovan",
year = "2020",
abstract = "Cross-laminated timber (CLT) panels have an increasing market share and extensive application in civil engineering, as full size walls or light floor structures. Due to their low environmental impact, excellent thermal characteristics and high mechanical performance, they are being extensively applied instead of conventional mineral-based building materials. The thick and orthogonal structure of CLT provides the considerable stiffness with the low weight and makes such panels particularly suitable in seismic-prone areas. The ease of assembly allows prefabrication and reduces construction time and cost.
Current models for calculating the stress-deformation state of a CLT loaded out-of-plane mainly emerged from the long tradition of using very simple one-dimensional (beam-like) elements in timber structures. The paper tends to overcome some limitations of the current models by using the full-layerwise plate theory (FLWT) of Reddy, serving as a basis for the implementation of layered finite elements. The proposed model accounts for the complex 3D stress state in CLT loaded out-of-plane and implies an original procedure for stress calculation. It is implemented using the original object-oriented MATLAB framework, while the graphical user interface for pre- and post-processing is developed using GiD.
The presented approach is validated using the available numerical and experimental data in the literature, and compared against the commonly used methods for the design of CLT. Finally, the 3D stress-deformation state in the CLT slab of complex shape (commonly used in building structures) is obtained using the FLWT-based finite elements. The results are validated against the numerical data from the commercial software, and then used for checking of the ultimate and serviceability limit states for CLT slab according to Eurocode 5. Excellent agreement of the obtained results confirmed the potential of the proposed model to become a promising tool for engineering design of CLT slabs of arbitrary geometry.",
publisher = "Elsevier",
journal = "Thin-Walled Structures",
title = "Three-dimensional stress analysis and design of cross-laminated timber panels using full-layerwise-theory-based finite element method",
pages = "107156",
volume = "157",
doi = "10.1016/j.tws.2020.107156"
}

Marjanović, M., Marković, N., Damnjanović, E.,& Cvetković, R.. (2020). Three-dimensional stress analysis and design of cross-laminated timber panels using full-layerwise-theory-based finite element method. in Thin-Walled Structures
Elsevier., 157, 107156.
https://doi.org/10.1016/j.tws.2020.107156

Marjanović M, Marković N, Damnjanović E, Cvetković R. Three-dimensional stress analysis and design of cross-laminated timber panels using full-layerwise-theory-based finite element method. in Thin-Walled Structures. 2020;157:107156.
doi:10.1016/j.tws.2020.107156 .

Marjanović, Miroslav, Marković, Nemanja, Damnjanović, Emilija, Cvetković, Radovan, "Three-dimensional stress analysis and design of cross-laminated timber panels using full-layerwise-theory-based finite element method" in Thin-Walled Structures, 157 (2020):107156,
https://doi.org/10.1016/j.tws.2020.107156 . .

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 . .