내부 철골끼움골조 및 벽체형 마찰댐퍼(WFD)로 보강된 2층 철근콘크리트골조내진성능에 대한 실험적 연구

초록

In this study, in order to confirm the seismic performance of reinforced concrete frames retrofitted with Wall Friction Damper(WFD), thetest was conducted by setting two-story Reinforced concrete frames (reference specimen, OMF-N and specimen retrofitted with internal H-shapedsteel frame and WFD, OMF-ALL(H)) as main variables. The WFD Seismic Retrofit Method is a mixture of strength improvement and energy dissipationmethods. To prevent the pre-destruction of existing structure by friction force before sufficient energy dissipation of WFD, the internal H-shaped steelframe and chemical anchor that penetrates the side of the beam were used to install WFD. According to the test results, the OMF-N specimen showedan brittle failure pattern caused by the shear force of the R/C column after the maximum strength was expressed. The OMF-ALL(H) specimen showedthat the reduction of pinching effect and the failure of the RC column occurred. Also, the maximum strength, cumulative energy dissipation and ductilityof OMF-ALL(H) increased 3.01 times, 7.2 times and 1.72 times for OMF-N. As a results, test results revealed that the WFD Seismic Retrofit Methodinstalled on Reinforced concrete structure improves the seismic performance and the strengthening effect is valid.

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