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Title |
Flexural Strength Model of Group-Coupled Precast Concrete Intermediate Shear Walls
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Authors |
이원준(Won-Jun Lee) ; 이득행(Dueckhang Lee) ; 김민수(Min-Su Kim) ; 심희영(Hee-Young Shim) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.3.371 |
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Keywords |
프리캐스트 콘크리트; 전단벽; 합성도; 합성작용; 접합부; 그룹합성 precast concrete; shear wall; coupling ratio; composite action; connection; group coupling |
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Abstract |
As modern buildings continue to increase in span length and story height, the application of precast concrete (PC) systems has become prevalent in the construction industry. PC members are manufactured in factory environments and subsequently assembled on-site, resulting in structural systems that inherently incorporate discrete connections and joints. These connections and joints play a critical role in the seismic performance of PC shear wall systems, as they govern the transfer of forces and the overall structural integrity under seismic loading. To ensure adequate seismic performance, precast connections and joints at wall-to-wall and wall-to-foundation interfaces should be designed to have sufficient overstrength and seismic details to achieve composite action and energy dissipation. In particular, PC shear walls require extensive joint detailing to address the combined effects of in-plane shear forces and flexural moments. This study newly introduced a group-coupling method for PC shear wall systems and subsequently presents a simplified flexural strength model by utilizing the G-factor. To validate the proposed approach, three full-scale PC coupled shear wall specimens were fabricated and tested under reversed cyclic loadings. It appeared that the proposed approach with G factor can simplify the design process by achieving a target level of composite action in group-coupled precast shear wall systems.
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