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Experimental Study of Flexural Behavior of Steel Beam Strengthened with the Fiber Reinforced Polymer Plastic(FRP) Strips

섬유보강플라스틱(FRP) 스트립으로 보강한 철골보의 휨거동에 관한 실험적연구

  • Choi, Sung Mo (School of Architecture, University of Seoul) ;
  • Park, Jai Woo (Korea Infrastructure Safety Corporation, Research division, Dept. of Architectural engineering)
  • 최성모 (서울시립대학교 건축학부) ;
  • 박재우 (한국시설안전공단 시설안전연구소, 광운대학교 건축공학과)
  • Received : 2013.12.26
  • Accepted : 2014.03.10
  • Published : 2014.04.27

Abstract

This paper presents the experimental results of flexural behavior of steel beam strengthened with fiber reinforced polymer plastic (FRP) strips subjected to static bending loading. Four H beams were fabricated strengthened with aramid strips and carbon strips and one control specimen were also fabricated. Among them two specimens were strengthened with partial length. The H-beams had two types of failure mode, depending on the length of the FRP strips:(1) strip debonding in beams with partial length reinforcement and (2) strip rupture in beams with full length reinforcement. From the test, it was observed that maximum increase of 16% was also achieved in bending-load capacity.

본 연구에서는 콘크리트 섬유보강플라스틱(FRP)로 보강된 철골보의 정적 휨하중상태에서 휨거동에 관한 실험결과를 제시하였다. 아라미드섬유 스트립과 탄소섬유 스트립으로 보강된 4개의 실험체를 제작하였으며, 1개의 기준실험체를 제작하였다. 이중 두 실험체는 부분보강방식으로 보강되었다. H빔은 두 종류의 파괴모드를 가지고 있는데, (1) 부분보강 실험체에서는 FRP 스트립이 탈락(debonding)되는 파괴모드를 보이고 있으며, 전면보강 실험체에서는 FRP 스트립이 파단(rupture)되는 거동을 보이고 있다. 실험결과 16%의 휨내력 상승효과를 관찰하였다.

Keywords

References

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