An Experimental Study for Flexural Bonding Characteristic of GFRP Rebar

GFRP 보강근의 휨.부착특성에 관한 실험적 연구

  • 심종성 (한양대학교 토목공학과) ;
  • 오홍섭 (진주산업대학교 토목공학과) ;
  • 주민관 (한양대학교 토목공학과) ;
  • 강태성 (한양대학교 토목공학과) ;
  • 김우중 (진주산업대학교 토목공학과) ;
  • 이원홍 (진주산업대학교 토목공학과)
  • Published : 2006.05.11

Abstract

This study is to examine bond strength of beam reinforced with GFRP rebar under 4-point bending test by adopting BRITISH STANDARD. The variables were made to have bonding length of 5times$(5d_b)$, 10times$(10d_b)$ and 15times$(15d_b)$ of the nominal diameter of GFRP rebar and were done to analyze the relationship between the bonding strength and the slip. In the result of the test, pull-out failure was dominant in the $5d_b$ and $10d_b$ specimen, both patterns of the pull-out failure and concrete splitting failure appeared in the $10d_b$. On the other hand, the $15d_b$ specimen showed only concrete splitting failure at the end of bonding length. Therefore, it was prove that available bonding length of the GFRP rebar under bending condition on static test is over $15d_b$ then farther research such as fatigue bending test, development of bonding model, FEM parameter study should be performed.

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