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An Experimental Study to Prevent Debonding Failure of Full-Scale RC Beam Strengthened with Multi-Layer CFS
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 Title & Authors
An Experimental Study to Prevent Debonding Failure of Full-Scale RC Beam Strengthened with Multi-Layer CFS
You Young-Chan; Choi Ki-Sun; Kim Keung-Hwan;
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 Abstract
It has been known that debonding failures between CFS(Carbon Fiber Sheet) and concrete in the strengthened RC beams are initiated by the peeling of the sheets in the region of combined large moment and shear forces, being accompanied by the large shear deformation after flexural cracks. These shear deformation effects are seldom occurred in small-scale model tests, but debondings due to the large shear deformation effects are often observed in a full-scale model tests. The premature debonding failure of CFS, therefore, must be avoided to confirm the design strength of full-scale RC beam in strengthening designs. The reinforcing details, so- called 'U-Shape fiber wrap at mid-span' which wrapped the RC flexural members around the webs and tension face at critical section with CFS additionally, were proposed in this study to prevent the debonding of CFS. Other reinforcing detail, so called 'U-Shape fiber wrap at beam end' were included in this tests and comparisons were made between them.
 Keywords
CFRP(carbon fiber reinforced polymer);CFS(carbon fiber sheet);strengthening;peeling;debonding failure;U-shape wrap;full-scale RC beam;
 Language
English
 Cited by
1.
아라미드섬유쉬트로 휨 보강된 RC보의 부착파괴 방지에 관한 실험적 연구,최기선;유영찬;김긍환;

한국구조물진단유지관리공학회 논문집, 2007. vol.11. 5, pp.144-152
2.
유리섬유시트로 휨보강된 RC보의 부착파괴 방지 상세에 관한 실험적 연구,유영찬;최기선;김긍환;

한국콘크리트학회논문집, 2007. vol.19. 6, pp.677-684 crossref(new window)
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