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Title |
Stiffness Reduction Effect of Vertically Divided Reinforced Concrete Shear Walls Under Cyclic Loading
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Authors |
황보동선(Dong-Sun Hwangbo) ; 손동희(Dong-Hee Son) ; 배백일(Baek-Il Bae) ; 최창식(Chang-Sik Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.3.103 |
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Keywords |
수직분할; 철근콘크리트 전단벽; 수직증축; 강성저감효과 Vertical division; Reinforced concrete shear wall; Vertical extension; Stiffness reduction effect |
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Abstract |
The purpose of this study is to experimentally evaluate the stiffness and strength reduction according to the reinforcing bar details of the vertically divided reinforced concrete shear walls. To confirm the effect of reducing strength and stiffness according to vertical division, four real-scale specimens were fabricated and repeated lateral loading tests were performed. As a result of the experiment, it was confirmed that the strength and stiffness were decreased according to the vertical division. In particular, as the stiffness reduction rate is greater than the strength reduction rate, it is expected that safety against extreme strength can be secured when the load is redistributed according to vertical division. As a result of checking the crack pattern, a diagonal crack occurred in the wall subjected to compression control among the divided walls. It was confirmed that two neutral axes occurred after division, and the reversed strain distribution appeared in the upper part, showing the double curvature pattern. In future studies, it is necessary to evaluate the stiffness reduction rate considering the effective height of the wall, to evaluate additional variables such as wall aspect ratio, and to conduct analytical studies on various walls using finite element analysis.
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