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신성우,안종문,이광수,반병렬,염성기,Shin, Sung Woo,Ahn, Jong Mun,Lee, Kwang Soo,Ban, Byung Lyul,Yeom, Sung Ki 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 논문집 Vol.2 No.1
It is demanded to obtain the design data for bond length of the strengthening carbon fiber sheets. An objectives of this study is to provide preliminary data of rational strengthening design method which is adequate to current domestic status. The present experimental study was performed to evaluate flexural strengthening effects of steel reinforced concrete beams strengthened with carbon fiber sheets. Following conclusions can be extracted. It is revealed that the maximum load carrying capacity is increased up to 9% when the reinforced concrete beams were strengthened with 1-ply of carbon fiber sheet which is half-width of beam. The performance of reinforced concrete sections were improved due to the strengthening carbon fiber sheets on the tensile side of beams. It is believed that the strengthening length of carbon fiber sheets must be provided as (0.5l+3d) to secure the ductile capacity of above three for the flexural strengthening of reinforced concrete beams.
탄소섬유쉬트의 정착 보강방법이 RC보의 휨거동에 미치는 영향
신성우 ( Shin Sung Woo ),반병렬 ( Bahn Byong Youl ),이광수 ( Lee Kwang Soo ),김영수 ( Kim Young Soo ),조삼재 ( Cho Sam Jae ),조인철 ( Cho In Choi ) 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.2 No.1
To investigate the effect of anchorage type of carbon fiber sheet (CFS) on flexural behavior of RC beams, the loading test of RC beams strengthed with CFS was conducted in variable of anchorage Types such as bolting anchorage and U type anchorage using CFS. This study can be summarized as follows ; It is confirmed experimentally that the bolting anchorage and U type anchorage with CFS is very effective to delay the bond failure and prevent the peeling of CFS. Also, the anchorage type applied with this study is very effective to improve the ductility compared with the improving of maximum flexural strength of RC beams. It is believed that the anchorage type used this study must secure the ductile capacity of above 3 for the flexural strengthening of RC beams. In the future, it is required to obtain the data about anchorage type of CFS for utilization of field work as well as investigate the ductile capacity of conventional study of anchorage type