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Title |
Effect of a Steel Clip-Type Binding Implement on the Axial Compressive Behavior of Reinforced Concrete (RC) Columns Confined by 90-Degree End-Hooked Hoops
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Authors |
박경언(Kyoung-Yeun Park) ; 윤현도(Hyun-Do Yun) ; 홍성걸(Sung-Gul Hong) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.5.469 |
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Keywords |
압축거동; 철근콘크리트 기둥; 구속; 횡보강근; 강재 클립형 연결장치 compressive behavior; RC column; confinement; lateral reinforcement; steel clip-type binding implement |
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Abstract |
An experimental study was conducted to investigate the compressive performance of reinforced concrete (RC) columns confined by transverse reinforcement with 90-degree hooks tied with a steel clip-type binding implement. The steel clip-type binding implement was proposed to replace lateral reinforcement with 135-degree standard hooks required by KDS 14 20 50 in RC columns. Ten full-scale square RC columns with different strengths of concrete, different details of hooks in lateral bars and different diameters of lateral bar were tested under uniaxial compressive loading. The RC column specimens were confined by standard hoops with 135-degree hooks at both ends and 135-degree, 90-degree hooks at each end or 135-degree hooks, 90-degree-hooks with steel clip-type binding implements at each end. The effectiveness of the proposed steel clip-type binding implement was evaluated by comparing the compressive behaviors of each RC column. Results indicated that the 90-degree-hooked lateral bars tied with the steel clip-type binding implement proposed in this study could be used effectively as an alternative to transverse reinforcement with 135-degree standard hooks in rectangular RC columns.
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