TY  - CONF
AU  - Krtinić, Nemanja
AU  - Gams, Matija
AU  - Marinković, Marko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3197
AB  - Confined masonry (CM) is one of the most popular and affordable earthquake-resistant con-struction technology for masonry structures. The reinforced concrete (RC) tie-columns in such construction play a crucial role in improving seismic response. However, their interaction with the masonry warrants a review due to recent changes in masonry construction, which are typical for Southeastern Europe. The modern masonry walls built from clay units are thick to achieve thermal efficiency. The tie-columns size has also increased, but they are narrower than the masonry. A part of masonry thus protrudes from the area confined by tie columns, which can lead to stress concentrations and early onset of damage of the protruding masonry, as was observed in recent tests on such masonry. This paper numerically analyzes this problem using a detailed three-dimensional (3D) finite element (FE) model that can capture this effect. The numerical model was developed in ABAQUS, and uses Concrete Damage Plasticity (CDP) material model to model the brittle response of clay blocks. All input data for the numerical model were obtained by dedicated tests. The results are compared to tests of walls in terms of damage propagation, strength and deformation response and show that damage to the protruding masonry can be successfully modelled. The results show a good alignment with the experiments and can be used for detailed modelling of seismic response of CM masonry structures and further research.
C3  - COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.
T1  - Experimental and numerical investigation of the seismic response of confined masonry walls
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3197
ER  - 

@conference{
author = "Krtinić, Nemanja and Gams, Matija and Marinković, Marko",
year = "2023",
abstract = "Confined masonry (CM) is one of the most popular and affordable earthquake-resistant con-struction technology for masonry structures. The reinforced concrete (RC) tie-columns in such construction play a crucial role in improving seismic response. However, their interaction with the masonry warrants a review due to recent changes in masonry construction, which are typical for Southeastern Europe. The modern masonry walls built from clay units are thick to achieve thermal efficiency. The tie-columns size has also increased, but they are narrower than the masonry. A part of masonry thus protrudes from the area confined by tie columns, which can lead to stress concentrations and early onset of damage of the protruding masonry, as was observed in recent tests on such masonry. This paper numerically analyzes this problem using a detailed three-dimensional (3D) finite element (FE) model that can capture this effect. The numerical model was developed in ABAQUS, and uses Concrete Damage Plasticity (CDP) material model to model the brittle response of clay blocks. All input data for the numerical model were obtained by dedicated tests. The results are compared to tests of walls in terms of damage propagation, strength and deformation response and show that damage to the protruding masonry can be successfully modelled. The results show a good alignment with the experiments and can be used for detailed modelling of seismic response of CM masonry structures and further research.",
journal = "COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.",
title = "Experimental and numerical investigation of the seismic response of confined masonry walls",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3197"
}

Krtinić, N., Gams, M.,& Marinković, M.. (2023). Experimental and numerical investigation of the seismic response of confined masonry walls. in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023..
https://hdl.handle.net/21.15107/rcub_grafar_3197

Krtinić N, Gams M, Marinković M. Experimental and numerical investigation of the seismic response of confined masonry walls. in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3197 .

Krtinić, Nemanja, Gams, Matija, Marinković, Marko, "Experimental and numerical investigation of the seismic response of confined masonry walls" in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023. (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3197 .

TY  - CONF
AU  - Krtinić, Nemanja
AU  - Gams, Matija
AU  - Marinković, Marko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3194
AB  - Masonry structures are commonly used for building residential buildings throughout the Balkans and worldwide, in urban and rural areas and areas with seismic risk. For masonry construction in regions with seismic risk, confined masonry (CM) construction offers an appealing alternative to unreinforced masonry (URM) due to its better seismic performance. The numerical simulation of CM is often based on the Equivalent Strut Model (ESM). Such a model provides a very reasonable compromise between accuracy and efficiency and is simple enough for use in design. The purpose of this paper is to compare the results of an experimental shear compression test on a modern CM wall with different ESM models. Five ESM models proposed by various authors are compared. The numerical pushover analyses were performed in the SAP2000 software, and the reference points of the model that gave the best alignment with experimental results were estimated using regression analyses. The results show that the simple modelling of CM walls with an equivalent diagonal strut, which carries load only in compression, can accurately simulate the global seismic response and is suitable for practical applications.
C3  - Proceedings of the 2nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023.
T1  - Pushover analysis of confined masonry walls using equivalent diagonal strut models
DO  - 10.5592/CO/2CroCEE.2023.30
ER  - 

@conference{
author = "Krtinić, Nemanja and Gams, Matija and Marinković, Marko",
year = "2023",
abstract = "Masonry structures are commonly used for building residential buildings throughout the Balkans and worldwide, in urban and rural areas and areas with seismic risk. For masonry construction in regions with seismic risk, confined masonry (CM) construction offers an appealing alternative to unreinforced masonry (URM) due to its better seismic performance. The numerical simulation of CM is often based on the Equivalent Strut Model (ESM). Such a model provides a very reasonable compromise between accuracy and efficiency and is simple enough for use in design. The purpose of this paper is to compare the results of an experimental shear compression test on a modern CM wall with different ESM models. Five ESM models proposed by various authors are compared. The numerical pushover analyses were performed in the SAP2000 software, and the reference points of the model that gave the best alignment with experimental results were estimated using regression analyses. The results show that the simple modelling of CM walls with an equivalent diagonal strut, which carries load only in compression, can accurately simulate the global seismic response and is suitable for practical applications.",
journal = "Proceedings of the 2nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023.",
title = "Pushover analysis of confined masonry walls using equivalent diagonal strut models",
doi = "10.5592/CO/2CroCEE.2023.30"
}

Krtinić, N., Gams, M.,& Marinković, M.. (2023). Pushover analysis of confined masonry walls using equivalent diagonal strut models. in Proceedings of the 2nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023..
https://doi.org/10.5592/CO/2CroCEE.2023.30

Krtinić N, Gams M, Marinković M. Pushover analysis of confined masonry walls using equivalent diagonal strut models. in Proceedings of the 2nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023.. 2023;.
doi:10.5592/CO/2CroCEE.2023.30 .

Krtinić, Nemanja, Gams, Matija, Marinković, Marko, "Pushover analysis of confined masonry walls using equivalent diagonal strut models" in Proceedings of the 2nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023. (2023),
https://doi.org/10.5592/CO/2CroCEE.2023.30 . .

TY  - CONF
AU  - Milijaš, Aleksa
AU  - Šakić, Bogdan
AU  - Marinković, Marko
AU  - Butenweg, Christoph
AU  - Gams, Matija
AU  - Klinkel, Sven
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3198
AB  - RC frames with masonry infills are a widespread construction form in seismically active regions. Under seismic loading, masonry infills are activated in in-plane direction due to the frame deformation. This leads to the complex frame-infill interaction which can cause the failure of masonry infills or whole RC frame structures. Therefore, the in-plane behaviour of in-filled RC frames was a subject of many research projects that aim to predict the seismic performance of infilled frame structures or prevent the damage in masonry infills. Among many parameters that affect seismic response of infilled frames, openings are recognized to play the most significant role as they can affect the stress fields and thus alter the failure mechanism of masonry infills. This paper presents results of the investigation of in-plane behaviour of masonry infilled RC frames with and without openings. In the study, experimental results are firstly presented, and they are afterwards used for validation of numerical model. Further, influence of different opening arrangements on in-plane response of infilled frames is studied in numerical simulations. Results of the study show that openings cause the extensive damage on masonry infills and thus lead to deterioration in in-plane behaviour of infilled RC frames. Additionally, the study reveals that even large openings affect the seismic response of infilled RC frames and that they cannot be easily neglected in design process, which makes the reliable prediction of the seismic response of infilled RC frames complicated. The study points at the urgency of development of innovative solutions that will be able to prevent the damage in masonry infills and simplify their seismic design.
C3  - COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.
T1  - RC frames with masonry infills with and without openings: experimental and numerical results
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3198
ER  - 

@conference{
author = "Milijaš, Aleksa and Šakić, Bogdan and Marinković, Marko and Butenweg, Christoph and Gams, Matija and Klinkel, Sven",
year = "2023",
abstract = "RC frames with masonry infills are a widespread construction form in seismically active regions. Under seismic loading, masonry infills are activated in in-plane direction due to the frame deformation. This leads to the complex frame-infill interaction which can cause the failure of masonry infills or whole RC frame structures. Therefore, the in-plane behaviour of in-filled RC frames was a subject of many research projects that aim to predict the seismic performance of infilled frame structures or prevent the damage in masonry infills. Among many parameters that affect seismic response of infilled frames, openings are recognized to play the most significant role as they can affect the stress fields and thus alter the failure mechanism of masonry infills. This paper presents results of the investigation of in-plane behaviour of masonry infilled RC frames with and without openings. In the study, experimental results are firstly presented, and they are afterwards used for validation of numerical model. Further, influence of different opening arrangements on in-plane response of infilled frames is studied in numerical simulations. Results of the study show that openings cause the extensive damage on masonry infills and thus lead to deterioration in in-plane behaviour of infilled RC frames. Additionally, the study reveals that even large openings affect the seismic response of infilled RC frames and that they cannot be easily neglected in design process, which makes the reliable prediction of the seismic response of infilled RC frames complicated. The study points at the urgency of development of innovative solutions that will be able to prevent the damage in masonry infills and simplify their seismic design.",
journal = "COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.",
title = "RC frames with masonry infills with and without openings: experimental and numerical results",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3198"
}

Milijaš, A., Šakić, B., Marinković, M., Butenweg, C., Gams, M.,& Klinkel, S.. (2023). RC frames with masonry infills with and without openings: experimental and numerical results. in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023..
https://hdl.handle.net/21.15107/rcub_grafar_3198

Milijaš A, Šakić B, Marinković M, Butenweg C, Gams M, Klinkel S. RC frames with masonry infills with and without openings: experimental and numerical results. in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023.. 2023;.
https://hdl.handle.net/21.15107/rcub_grafar_3198 .

Milijaš, Aleksa, Šakić, Bogdan, Marinković, Marko, Butenweg, Christoph, Gams, Matija, Klinkel, Sven, "RC frames with masonry infills with and without openings: experimental and numerical results" in COMPDYN 2023 - 9th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Athens, Greece, 12-14 June 2023. (2023),
https://hdl.handle.net/21.15107/rcub_grafar_3198 .