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Journal of the Korean Society of Hazard Mitigation 2011;11(6):25-30.
Published online December 31, 2011.
재활용 FRP로 보강된 섬유 보강 콘크리트 보-기둥 접합부의 내진성능
박종원, 백주현
Seismic Performance of Reinforced Concrete Beam-to-Column Joints Strengthened with Recycled Fibres from Fiber-Reinforced Plastics
Jong-Won Park, Joo-Hyun Paek
Abstract
Increase of waste FRP(fiber reinforced plastics) has caused environmental problems. Recently, the technology of making concrete-reinforcing fibers from waste FRP was developed and experimental tests were performed to study the structural performance of concrete members strengthened with recycled fibres. The purpose of this study is to investigate the effect of recycled glass-fibers from waste FRP on the seismic performance of reinforced concrete beam-to-column joints. Experimental tests were performed for two reinforced concrete beam-to-column joint specimens with the same reinforcements. One joint was strengthened with recycled fibers at a fibre volumn fraction of 1.0%. Cyclic-loading tests were performed on the specimens. Test results showed that use of recycled fibers increased the seismic performance of the reinforced concrete beam-to-column joint significantly.
Key Words: Recycled FRP; Fiber Reinforced Concrete; Seismic performances; Beam-to-Column Joint; Cyclic loading
요지
FRP 폐기물의 증가는 환경문제를 유발하여 왔다. 최근 들어 FRP 폐기물로부터 콘크리트 보강용 유리섬유를 재활용해 내는 기술이 개발되었으며 이러한 재활용 FRP 섬유를 혼입하여 보강한 철근콘크리트 부재의 구조적 성능에 대한 실험연구가 수행되었다. 본 연구의 목적은 FRP 폐기물로부터 분리해 낸 재활용 유리섬유가 철근콘크리트 보-기둥 접합부의 내진성능에 미치는 영향을 조사하는 것이다. 동일한 배근 상세를 갖는 2개의 철근콘크리트 보-기둥 접합부 실험체에 대한 실험연구가 수행되었다. 하나의 실험체는 보-기둥 접합부에 체적비 1%의 재활용 유리섬유를 혼입하였다. 실험체에 대한 실험은 반복하중 실험으로 수행하였다. 실험결과 재활용 유리섬유의 혼입은 균열의 진전을 억제함으로써 철근콘크리트 보-기둥 접합부의 에너지 소산능력을 16% 정도 증가시키는 것으로 나타났다.
핵심용어: 재활용 FRP; 섬유 보강 콘크리트; 내진성능; 보-기둥 접합부; 반복하중
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