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Title |
Evaluation of Seismic Performances on Prestressed Composite Coupling Beams with Discontinuous Webs
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Authors |
오재열 ; 이득행 ; 최승호 ; 김강수 ; 이성태 |
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Keywords |
연결합성보 ; 아코디언효과 ; 프리스트레싱 ; 불연속웨브 Composite coupling beam ; Accordion effect ; Prestressing ; Discontinuous web |
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Abstract |
The shear wall system with coupling beams has been known as an effective means for moderate and high rise buildings up to 40 stories, because this structural system can provide the enhanced lateral stiffness compared to individual shear walls. Typical reinforced concrete coupling beams have difficulties in construction due to complicated reinforcing work on site, and steel coupling beams also have disadvantages in economical point of view because of a large number of stiffeners required for its stability under lateral loading. To overcome these disadvantages in existing coupling beam systems, this study developed the prestressed composite coupling beam with discontinuous webs, which have improved constructability, economic feasibility, and reduced sectional size. The reversed cyclic loading test on two prestressed composite coupling beams with discontinuous webs having different shear reinforcement ratios have been conducted to investigate their structural performances, and test results showed that the proposed composite coupling beams had good seismic performances.
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