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Title |
Seismic Performance Assessment of Roof-Level Joints with Steel Fiber-Reinforced High-Strength Concrete
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Authors |
김상희(Sang-Hee Kim) ; 권병운(Byung-Un Kwon) ; 강현구(Thomas H.-K. Kang) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2016.28.2.235 |
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Keywords |
내진성능 ; 고강도콘크리트 ; 고강도철근 ; 강섬유 ; 최상층 접합부 seismic performance ; high-strength concrete ; high-strength reinforcement ; steel fiber ; roof level joint |
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Abstract |
This study was conducted to verify seismic performance of special moment frame's joints at roof-level with high-strength concrete and SD600 bars. K-RC-H was designed according to the seismic code and K-HPFRC-H had 150% of the original hoop spacing and 1.0% steel fiber volume fraction compared with K-RC-H. Both specimens had remarkable seismic performance without noticeable decrease in moment, but with very good energy dissipation before rebar failure. The U-bars in the joint sufficiently constrained rebar`s action that pushed the cover upward. SD600 bars with 1.25??? had minimum slip in the joint. It was considered that the steel fiber contributed to improvement of the bending moment and joint shear distortion, and the result showed that it would be possible to increase the hoop spacing to 150% of the regular spacing.
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