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Title |
Improvement and Seismic Performance Evaluation of RC Exterior Beam-Column Joints Using Recycled Coarse Aggregate with Hybrid Fiber
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Authors |
하재훈(Jae-Hoon Ha) ; 하기주(Gee-Joo Ha) ; 신종학(Jong-Hak Shin) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.2.160 |
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Keywords |
순환굵은골재 ; 하이브리드섬유 ; 내진성능 ; 외부 보-기둥 접합부 Recycled coarse aggregate ; Hybrid fiber ; Seismic performance ; Exterior beam-column joint |
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Abstract |
In this study, experimental research was carried out to improve the seismic performance of reinforced concrete exterior beam-column joint regions using replacing recycled coarse aggregate with hybrid fiber (steel fiber+PVA fiber) in existing reinforced concrete building. Therefore it was constructed and tested seven specimens retrofitting the beam-column joint regions using such retrofitting materials. Specimens, designed by retrofitting the beam-column joint regions of reinforced concrete building, were showed the stable failure mode and increase of load-carrying capacity due to the effect of crack control at the times of initial loading and bridge of retrofitting hybrid fiber during testing. Specimens BCJGPSR series, designed by the retrofitting of replacing recycled coarse aggregate with hybrid fiber in reinforecd beam-column joint regions were increased its maximum load carrying capacity by 1.01~1.04 times and its energy dissipation capacity by 1.06~1.29 times in comparison with standard specimen BCJS. Also, specimen BCJGPSR1 were increased its energy dissipation capacity by 1.33~1.65 times in comparison with specimens BCJS, BCJP and BCJGPR series for a displacement ductility of 9.
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