유사동적실험에 의한 HSWF 외부접합공법으로 내진보강 된 실물 2층 철근콘크리트 골조의 내진성능 평가

초록

A new HSWF (H-section Steel Window-typed Frame) external connection method was proposed for seismic strengthening of existing medium-and low-rise reinforced concrete buildings in this study. The external connection technique was developed considering the structural integral behavior between existing frame and strengthening member. The HSWF method, proposed in this study, is capable of carrying out the seismic rehabilitation construction while residents can live inside structures. The method is one of the strength design approach by retrofit which can easily increase the ultimate lateral load capacity of concrete buildings controlled by shear. Two full-size two-story reinforced concrete frames based on the existing school building without seismic details in Korea were designed and fabricated for the structural test. The pseudo-dynamic test was carried out in order toverify the seismic strengthening effects of the proposed method in terms of the maximum load carrying capacity and ductility. Test results revealed that the proposed HSWF strengthening method installed in reinforced concrete frame enhanced conspicuously the strength and displacement capacities, and the method can resist markedly under the large scaled earthquake intensity level.

키워드