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Title |
Comparative Study on Seismic Performance of Masonry Wall Strengthened by FRP Sheet or Steel-Bar Truss System
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Authors |
이혜지(Hye-Ji Lee) ; 김상희(Sanghee Kim) ; 양근혁(Keun-Hyeok Yang) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.5.1 |
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Keywords |
조적벽체; 내진 성능; 강봉 트러스 시스템; FRP 시트 masonry walls; seismic performance; steel-bar truss system; FRP sheet |
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Abstract |
In this study, the in-plane and out-of-plane seismic performance of the masonry wall strengthened using the steel bar truss system proposed by Hwang et al. (2021a, 2021b) or using FRP sheets were compared and evaluated. The maximum strength of the masonry wall reinforced with FRP sheets for the in-plane and out-of-plane loading was 71% and 85%, respectively, of that of the non-reinforced masonry wall. Meanwhile, the maximum strength of the masonry wall reinforced with the steel bar truss system was approximately 1.8 times higher than that of the non-reinforced masonry wall. Compared with the FRP sheet method, the steel bar truss system was excellent at improving the maximum load capacity, rigidity, and energy dissipation capacity. However, in the case of a masonry wall reinforced with FRP sheets, the masonry wall was overstrengthened with the FRP sheets covering the entire masonry wall, and it is considered that the overstrengthened specimen experienced sliding failure, resulting in a lower strength than the other specimens. A follow-up study is needed to compare the seismic performance of the specimen involving only a part of the masonry wall reinforced with the FRP sheets and the specimen reinforced using the steel bar truss system.
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