GFRP Rebar로 보강된 콘크리트보의 피로 휨·부착성능에 관한 실험적 연구
An Experimental Study on the Fatigue Flexural Bonding Characteristic of Concrete Beam Reinforced with GFRP Rebar
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
This study is to examine bond strength of beam reinforced with GFRP rebar under 4-point fatigue bending test by adopting BRITISH STANDARD. The variables were made to have bonding length of 5times(5db), and 15times(15db) 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 5db specimen, patterns of the pull-out failure and concrete shear failure appeared in the 15db specimen showed only concrete shear failure at the end of bonding length. Therefore, The strain development consist of three different stage : A rapid increases form 0 to about 10% of total fatigue life. A uniform increases form 10% to about 70%～90%. Then a rapid increases until failure, if failure takes place. It seems that stress level has not influence on the secant modules of elasticity. And also according to the outcome the existing strengthening method came out to be the most superiority in S-N graphs.
Abstract
This study is to examine bond strength of beam reinforced with GFRP rebar under 4-point fatigue bending test by adopting BRITISH STANDARD. The variables were made to have bonding length of 5times(5db), and 15times(15db) 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 5db specimen, patterns of the pull-out failure and concrete shear failure appeared in the 15db specimen showed only concrete shear failure at the end of bonding length. Therefore, The strain development consist of three different stage : A rapid increases form 0 to about 10% of total fatigue life. A uniform increases form 10% to about 70%～90%. Then a rapid increases until failure, if failure takes place. It seems that stress level has not influence on the secant modules of elasticity. And also according to the outcome the existing strengthening method came out to be the most superiority in S-N graphs.
참고문헌 (6)
- Hybrid FRP Rod를 활용한 콘크리트구조 모니터링 시스템 개발 연구 보고서, "심종성", 건설교통부, ~ (2006)
- 콘크리트 빔 구조물의 수명예측과 피로거동에 관한 연구 보고서, "오병환", 한국도로공사, ~ (1997)
- 오병환, "콘크리트의 피로강도 및 피로신뢰성 해석에 관한 이론 및 실험연구", 대한토목학회 논문집, (4), pp.113~119 (1985), 대한토목학회
- Balzs, G.L., "Fatigue of Bond", ACI Material journal, 88(6), pp.620~629 (1991)
- "BRITISH STANDARD BS EN 1269-1:2000 Determination of the bond behaviour between reinforcing steel and autoclaves aerated concrete by the “beem test” Part 1 : short term test", ~
- Tighiouart, B., "Investigation of bond concrete member with fiber reinforced Poymer(FRP) bars", Construction and Building Material, 12, pp.453~462 (1998)