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Title |
An Experimental Study on Seismic Performance of Two-story Reinforced Concrete Frames Retrofitted with Internal Steel Frame and Wall Type Friction Damper
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Authors |
유창기(Chang-Gi Yoo) ; 최창식(Chang-Sik Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.6.64 |
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Keywords |
철근콘크리트 골조; 마찰댐퍼; 내부 H형강 프레임; 내진보강 Reinforced concrete frame; Friction damper; Internal H-shape steel frame; Seismic retrofit |
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Abstract |
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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