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Title |
A Study on Improvement of Seismic Performance of High Strength Reinforced Concrete Interior Beam-Column Joints using High Ductile Fiber-Reinforced Mortar
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DOI |
https://doi.org/10.4334/JKCI.2012.24.6.753 |
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Keywords |
고인성섬유 복합모르타르 ; 내진성능 ; 내부 보-기둥 접합부 ; 반복하중 ; 전단보강 high ductile fiber-reinforced mortar ; seismic performance ; interior beam-column joint ; cyclic loads ; shear reinforcement |
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Abstract |
In this study, experimental research was carried out to evaluate and improve the constructability and seismic performance of high strength R/C interior beam-column joints regions, with or without the shear reinforcement, using high ductile fiber-reinforced mortar. Six specimens of retrofitted the beam-column joint regions using high ductile fiber-reinforced mortar are constructed and tested for their retrofit performances. Specimens designed by retrofitting the interior beam-column joint regions (IJNS series) of existing reinforced concrete building showed a stable mode of failure and an increase in load-carrying capacity due to the enhancement of crack dispersion by fiber bridging from using new high ductile materials for retrofitting. Specimens of IJNS series, designed by the retrofitting of high ductile fiber-reinforced mortar in beam-column joint regions increased its maximum load carrying capacity by 96~102.8% and its energy dissipation capacity by 0.99~1.11 folds when compared to standard specimen of SIJC with a displacement ductility of 5.
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