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Title |
Strength Characteristics of Composite Link Beams with Alternative Details
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Authors |
김선웅(Sun-Woong Kim) ; 박완신(Wan-Shin Park) ; 장영일(Young-Il Jang) ; 김선우(Sun-Woo Kim) ; 윤현도(Hyun-Do Yun) |
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DOI |
https://doi.org/10.4334/JKCI.2021.33.3.235 |
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Keywords |
연결보; 내진성능; 대체 상세; 합성 coupled shear wall; seismic design; link beam; alternative details |
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Abstract |
Medium-scale earthquakes have been occurring in Korea more and more frequently. As buildings have become larger, revisions have been made to seismic design guidelines, and research on lateral force resisting systems has been broadly conducted to improve resisting performance. As a seismic resisting system, a coupled shear wall system is a representative structural system employed to resist lateral shear force under wind or seismic load. A link beam in the coupled shear wall system can transfer most of the overturning moment by the coupling action between the wall and the link beam. However, the coupling beams in a coupled shear wall system must possess adequate strength and stiffness to effectively resist lateral loads due to the framing action of them. In order to meet the required performance, such a coupling beam is densely laid out with a diagonal bundle reinforcing bar and stirrup. The detailing of the reinforcement is overall quite complicated and incurs problems in its installation. This study investigated the strength characteristics of composite link beams with alternative details. The test variables of this study were the reinforcement method of diagonal reinforcement and the spacing of the stirrup. The results showed that the average capacities of the Concrete link beam (CCB) specimen group exceeded the estimated values of the ACI 318-19 specification.
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