Experimental results of reinforced concrete frames with masonry infills with and without openings under combined quasi-static in-plane and out-of-plane seismic loading

Milijaš, Aleksa; Marinković, Marko; Butenweg, Christoph; Klinkel, Sven

doi:10.1007/s10518-023-01664-4

Cited by 9 publications

(3 citation statements)

References 64 publications

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“…Window opening covers around 18 % of the infill panel, while full-height door opening takes around 38 % of the panel surface. Further information on the exact position and dimensions of the openings, as well as on the detailed frame dimensions and reinforcement distribution can be found in [24]. Furthermore, mechanical characteristics of mortar, bricks and masonry that are used in the experimental campaign have been determined in standardized tests according to DIN EN 1015(2007 [25], DIN EN 772 (2016) [26] and DIN EN 1052 (1998) [27], respectively.…”

Section: Test Specimens and Materials Characteristicsmentioning

confidence: 99%

“…Furthermore, mechanical characteristics of mortar, bricks and masonry that are used in the experimental campaign have been determined in standardized tests according to DIN EN 1015(2007 [25], DIN EN 772 (2016) [26] and DIN EN 1052 (1998) [27], respectively. Table 1 summarizes the test results, while more detailed information is provided in [24].…”

Section: Test Specimens and Materials Characteristicsmentioning

confidence: 99%

“…Out-of-plane loads are applied by inflating four air bags. Further details on the test setup can be found in [24].…”

Section: Test Setupmentioning

confidence: 99%

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Rc Frames With Masonry Infills With and Without Openings: Experimental and Numerical Results

Milijaš,

Šakić,

Marinković

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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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 infilled 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. 2127COMPDYN 2023 9 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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Section: Test Specimens and Materials Characteristicsmentioning

confidence: 99%

Section: Test Specimens and Materials Characteristicsmentioning

confidence: 99%

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Rc Frames With Masonry Infills With and Without Openings: Experimental and Numerical Results

Milijaš,

Šakić,

Marinković

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Experimental investigation on the seismic performance of reinforced concrete frames with decoupled masonry infills: considering in-plane and out-of-plane load interaction effects

Milijaš,

Marinković,

Butenweg

et al. 2024

Bull Earthquake Eng

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Masonry infills are frequently employed as both outer and inner partitions in reinforced concrete (RC) frame structures due to their outstanding characteristics in terms of energy efficiency, fire resistance and sound isolation. However, common construction practice typically involves the mortar connection between masonry infills and RC frames. For this reason, the unforeseen frame-infill interaction takes part under seismic loading, which leads to severe and uncontrollable damage to masonry infills. This interaction also causes damage or even the collapse of the RC frames and thus of the whole structures. The poor performance of infilled RC frame structures in recent earthquake events is a strong motivation for the development of innovative engineering solutions, which aim to mitigate the detrimental effects of frame-infill interaction. This article introduces an innovative decoupling system founded on the concept of decoupling the RC frame from the masonry infill. The decoupling is achieved by inserting elastomeric material between the masonry infill and RC frame. The properly designed decoupling system allows infill activation only at high in-plane drifts. Simultaneously, it provides boundary conditions for seismic loads acting perpendicular to the infill plane. Firstly, the article explains the design of the masonry infill with the decoupling system and its installation. Afterwards, the results of small specimen tests carried out to determine the load-bearing capacity of the decoupling system are presented. Furthermore, the article discusses the findings of an extensive experimental campaign conducted on nine real-size RC frames with decoupled infills subjected to separate and combined in-plane and out-of-plane loadings. In addition to different loading types, various infill configurations are considered – solid infill, infill with centric window, and infill with centric door opening. Finally, the experimental results of RC frames with decoupled infills are compared with the experimental results of traditionally infilled RC frames, which were tested within the framework of the same project. The thorough evaluation and comparison of the experimental findings demonstrate the significant improvement of seismic performance of infilled RC frames if the decoupling system is applied.

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Application of an intelligent hybrid global optimization (IHGO) algorithm for enhanced seismic analysis in masonry-infilled RC frames

Alfraihat

2024

Asian J Civ Eng

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Experimental results of reinforced concrete frames with masonry infills with and without openings under combined quasi-static in-plane and out-of-plane seismic loading

Cited by 9 publications

References 64 publications

Rc Frames With Masonry Infills With and Without Openings: Experimental and Numerical Results

Rc Frames With Masonry Infills With and Without Openings: Experimental and Numerical Results

Experimental investigation on the seismic performance of reinforced concrete frames with decoupled masonry infills: considering in-plane and out-of-plane load interaction effects

Application of an intelligent hybrid global optimization (IHGO) algorithm for enhanced seismic analysis in masonry-infilled RC frames

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