복합섬유패널과 BFRP시트를 이용한 보강이 정사각형 단면 철근콘크리트 기둥의 지진거동에 미치는 영향

A series of cyclic tests was conducted to investigate the seismic behavior of square reinforced concrete (RC) columns strengthened with basalt-based fiber reinforced polymer (BFRP) sheets and composite fiber panels. Even with shear damages under the significant axial load ratio around 30%, the specimens with wrapping had improvements in displacement ductility and energy dissipation. The failure mode of the specimens is classified as flexural-shear high ductility failure, which is frequently observed in RC structures. So far, the effect of wrapping with composite materials, including BFRP on square RC columns finally reaching this failure mode, was not extensively examined. The test results may contribute to a better understanding of the flexure-shear behavior of RC columns strengthened with composite materials.