Effect of Strengthening amount and length of CFS on Flexural Behavior of RC Beams

탄소섬유쉬트의 보강량 및 정착길이가 RC보의 휨거동에 미치는 영향

  • 신성우 (한양대학교 건축공학과 교수, 공박) ;
  • 반병렬 (대전대학교 건축과 조교수, 공박) ;
  • 안종문 (한양대학교 건축공학과) ;
  • 조인철 (한양대학교 건축공학과) ;
  • 김영수 ((주)한국카본 개발영업부) ;
  • 조삼재 ((주)한국카본 개발영업부)
  • Published : 1998.04.01

Abstract

The purpose of this study is to evaluate the flexural strengthening effects of RC beams reinforced with carbon fiber sheets (CFS) in variable of strengthening amount and anchorage length of CFS. This study can be summarized as follows. The CFS shares the tensile stress such as rebar during loading test. Also, as the strengthening amount of CFS is increased, the maximum flexural strength of RC beams reinforced with CFS is increased. Therefore, it is confirmed that the CFS's strengthening method is very effective to improve the flexural strength of RC beams. The maximum flexural strength of RC beams with CFS is determined by bond failure between CFS and concrete surface. So, the evaluation of CFS's strengthening effect can be calculated using the tensile stress of CFS which is peeling. When the anchorage length of CFS. But, in case of same anchorage length of CFS, when the strengthening amount of CFA is increased, the ductility is decreased. Therefore, it is considered that the anchorage of CFS in the end zone is necessary.

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