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Title |
Seismic Retrofit of RC Exterior Beam-Column Joints Strengthened with CFRP
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Authors |
김민 ; 이기학 ; 이재홍 ; 우성우 ; 이정원 |
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Keywords |
beam-column joint ; carbon fiber-reinforced polymer(CFRP) ; cyclic load ; flexural capacity and ductility ; seismic detail |
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Abstract |
It has been shown that many Reinforced Concrete(RC) structures designed without seismic details have experienced brittle shear failures in the beam-column joint area and resulted in large permanent deformations and structural collapse. In this study, experimental investigations into the performance of exterior reinforced concrete beam-column joints strengthened with the carbon fiber-reinforced polymer(CFRP) under cyclic loading were presented. The CFRP has been applied by choosing different combinations and locations to determine the effective way to improve structural performances of joints. Eight beam-column joints were tested to investigate behaviors of each specimen under cyclic load and to compare performances of seismic retrofit. According to the experimental study, the retrofit strengthened with the CFRP provides significant improvements of flexural capacity and ductility of beam-column joints originally built without seismic details.
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