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Title |
Seismic Performance of Concrete Masonry Unit (CMU) Infills in Reinforced Concrete Moment Framing System
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DOI |
https://doi.org/10.11112/jksmi.2019.23.1.19 |
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Keywords |
압축 스트럿 ; 유한요소해석 ; 조적 끼움벽 ; 비선형 정적해석 ; 성능기반 내진설계 Compression Strut ; Finite Element Analysis ; Masonry Infills ; Nonlinear Static Analysis ; Performance Based Seismic Design |
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Abstract |
The masonry infill walls are one of the most popular components that are used for dividing and arranging spaces in building construction. In spite of the fact that the masonry infills have many advantages, the system needs to be used with caution when the earthquake load is to be considered. The infills tend to develop diagonal compression struts during earthquake and increase the demand in surrounding RC frames. If there are openings in the infill walls, the loading path gets even complicated and the engineering judgements are required for designing the system. In this study, a masonry infill system was investigated through finite element analysis (FEA) and the results were compared with the current design standard, ASCE 41. It is noted that the equivalent width of the compression strut estimated by ASCE 41 could be 32% less than that using detailed FEA. The global load resisting capacity was also estimated by 28% less when ASCE 41 was used compare to the FEA case. Rather than using expensive FEA, the adapting ASCE 41 for the analysis and design of the masonry infills with openings would provide a good estimation by about 25% conservatively.
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