다방향 채널형 단부정착장치를 이용한 CFRP판 보강 RC 보의 휨거동
Flexural Behavior of RC Beams Strengthened with CFRP Plate Using Multi-directional Channel-type Anchorage System
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The aim of this paper is to clarify the structural performance of RC beams strengthened with Carbon Fibre Reinforced Polymer(CFRP) plates using channel-type anchorage system. Twelve RC beams were specifically designed without and with a channel-type anchorage system, which was carefully detailed to enhance the benefits of the strengthening plates. All the twelve beams were identical in terms of their geometry but varied in their internal reinforcement, concrete strength. All the beams were tested under four point bending and extensively instrumented to monitor strains, cracking, load capacity and failure modes. The structural response of all the twelve beams is then critically analyzed in terms of deformability, strength and failure processes. It is shown that with a channel-type anchorage system, a brittle debonding failure of a strengthened beam can be transformed to an almost ductile failure with well-defined enhancement of structural performance in terms of both deformation and strength.
Abstract
The aim of this paper is to clarify the structural performance of RC beams strengthened with Carbon Fibre Reinforced Polymer(CFRP) plates using channel-type anchorage system. Twelve RC beams were specifically designed without and with a channel-type anchorage system, which was carefully detailed to enhance the benefits of the strengthening plates. All the twelve beams were identical in terms of their geometry but varied in their internal reinforcement, concrete strength. All the beams were tested under four point bending and extensively instrumented to monitor strains, cracking, load capacity and failure modes. The structural response of all the twelve beams is then critically analyzed in terms of deformability, strength and failure processes. It is shown that with a channel-type anchorage system, a brittle debonding failure of a strengthened beam can be transformed to an almost ductile failure with well-defined enhancement of structural performance in terms of both deformation and strength.
참고문헌 (9)
- 김태우, "FRP보강 RC보의 조기파괴기준", 한국콘크리 트학회 가을학술발표회 논문집, pp.137~144 (2005), 한국콘크 리트학회
- 김형진, "CFRP판을 단부정착한 RC보의 휨성능 개선에 관한 실험적 연구", 구조물진단학회지, 10(4), pp.167~174 (2006), 한국구조물진단유지관리공학회
- 박상렬, "부착길이와 복부정착이 CFRP판으로 보강된 RC 보의 휨 보강효과에 미치는 영향", 콘크리트학회 논문집, 14(5), pp.645~652 (2002), 한국콘크리트학회
- 박상렬, "CFRP판으로 부착된 R.C 보의 복부정착 형태에 따른 보강효과", 대한토목학회 논문집A, 23(6A), pp.1113~1121 (2003), 대한토목학회
- 박종섭, "탄소섬유쉬트에 의해 휨보강된 RC보의 휨강도 추정", 콘크리트학회 논문집, 17(2), pp.213~220 (2005), 한국콘크리트학회
- 심종성, "CFRP로 성능향상된 철근콘크리트 보의 Rip-off 파괴메커니즘 고찰", 콘크리트학회 논문집, 17(6), pp.993~1000 (2005), 한국콘크리트학회
- 우상균, "CFRP판으로 프리스트레싱 보강된 RC 보의 휨강도 해석", 구조물진단학회지, 11(1), pp.181~192 (2007), 한국구조물진단유지관리공학회
- Garden, H. N., "An Experimental Study of the Failure Modes of Reinforced Concrete Beams Strengthened with Prestressed Carbon Composite Plates", Composites Part B, 29, pp.411~424 (1998)
- Triantafllou, T. C., "Strengthening of Concrete Structures with Prestressed Fiber Reinforced Plastic Sheets", ACI Structural Journal, 89(3), pp.235~244 (1992)