Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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An Experimental Study on the Seismic Performance of Reinforced Concrete Exterior Beam-Column Joint with Steel Fiber Volume Fractions

강섬유 혼입률에 따른 철근콘크리트 외부 보-기둥 접합부의 내진성능에 대한 실험적 연구

  • 이장재 (한양대학교 일반대학원) ;
  • 배백일 (한양대학교 산업과학연구소) ;
  • 최창식 (한양대학교 건축공학부)
  • Received : 2017.09.18
  • Accepted : 2018.01.15
  • Published : 2018.04.30
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Abstract

The purpose of this study is to evaluate the anchorage capacity of longitudinal bars for reinforced concrete exterior beam - column joints with steel fiber volume fractions. For this purpose, the steel fiber volume fraction was set to 0, 1, 2%, and the performance was compared with that of each other specimens. According to the test results, the maximum strength of EX-HK-NJR-0 decreased by 13% compared with the control specimen and EX-HK-NJR-1 decreased by 3% compared to the control specimen. However, when 2% of steel fiber was mixed, the maximum strength increased about 56% compared to the control specimen. The energy dissipation capacity of EX-HK-NJR-0 (when no transverse steel bars are placed) decreased by 61% compared to the control specimen. In addition, the energy dissipation capacity of the specimens with a steel fiber content of 1% decreased by 5% and 2% increased by 94% compared to control specimen. EX-HK-NJR-1,2 and the control specimen EX-HK-JR-0 experienced yielding of the reinforcing bars at the column interface before maximum strength development. However, when the EX-HK-NJR-0, the reinforcing bars at the column interface experienced yielding after maximum strength development. Therefore, reinforcement of steel fiber is considered to reduce the required development length for yielding of steel bars.

Keywords

Acknowledgement

Supported by : 과학기술정보통신부, 국토교통부

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