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Title |
Shear Performance of High-Strength Concrete Columns with Transverse Reinforcement Binded by Steel Clip-Type Implements
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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.2022.34.2.161 |
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Keywords |
이력거동; 고강도 철근콘크리트 기둥; 구속; 횡보강근; 강재 클립형 연결장치 cyclic behavior; RC column; confinement; transverse reinforcement; steel clip-type binding implement |
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Abstract |
The detailing of transverse reinforcement leads to significant improvement of ductility with increasing confining core concrete and shear capacity of RC (Reinforced Concrete) columns. Present seismic design codes strictly specify design provisions for quantity, spacing and anchorage of hoops in RC columns. Particularly, 135-degree end hooks for anchorage of hoops can result in difficulty of placing the transverse reinforcements. This paper describes experimental results regarding cyclic behavior of high-strength RC columns with different anchorage details (90-degree, 135-degree, 90-degree and steel clip-type binding implement) of end hooks to improve constructability. Results indicate that the seismic performance of a high-strength RC column confined with hoops with 90-degree end hooks and binding implemented is similar to that of specimen having conventional hoops with 135-degree standard end hooks. Therefore, the use of 90-degree end hooks and steel clip-type binding for anchorage of transverse reinforcement in RC columns is acceptable and can be considered an alternative to 135-degree standard end hooks in rectangular high-strength RC columns.
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