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Title |
Effect of BFRP Wrapping on Seismic Behavior of Rectangular RC Columns
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Authors |
이혜린(Hyerin Lee) ; 조정현(Junghyun Cho) ; 이승건(Seung-Geon Lee) ; 이수형(Su-Hyung Lee) ; 홍기증(Kee-Jeung Hong) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.6.153 |
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Keywords |
BFRP 시트; 내진 보강; 구속 효과; 직사각형 단면; 철근콘크리트 기둥 BFRP wrapping; seismic behavior; confinement; rectangular cross-section; reinforced concrete columns |
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Abstract |
Columns are one of the most critical parts of a structural system subjected to earthquake excitations. In this regard, extensive experimental studies have been conducted to evaluate the effect of fiber reinforced polymer (FRP) wrapping on the seismic performance of reinforced concrete (RC) columns. Among them, many studies focused on the behavior of circular or square RC columns strengthened with CFRP or GFRP sheets. Since the cross-sectional shape affects confinement by FRP wrapping, its strengthening effect and final damage pattern may differ with shapes. In this study, a series of cyclic tests was conducted to investigate the seismic behavior of rectangular reinforced concrete columns strengthened with basalt-based fiber reinforced polymer (BFRP) sheets and composite fiber panels. The result shows that the effect of strengthening is not significant, and it implies a little increase of confinement by BFRP sheets and composite fiber panels, which is considered partly due to the cross-sectional shape of the columns.
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