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Title |
Effect of Reinforcement Layout on Structural Performance of Reinforced Concrete Coupling Beams with High-strength Steel Bar
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Authors |
장석준(Seok-Joon Jang) ; 정권영(Gwon-Young Jeong) ; 김선우(Sun-Woo Kim) ; 윤현도(Hyun-Do Yun) ; 천영수(Young-Soo Chun) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.2.095 |
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Keywords |
연결보 ; 구조성능 ; 철근상세 ; 고강도 철근 Coupling beam ; Structural performance ; Reinforcement layout ; High-strength steel bar |
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Abstract |
This paper describes the experimental results for the structural performance of full-scale coupling beams with different reinforcement layout (diagonal and horizontal). For the reinforcements of the coupling beams, high-strength steel bars(SD500 and SD600) were used in order to improve workability and economic feasibility. The rigid steel frames and linked joints were used to maintain the clear span length (distance between both shear walls) of the coupling beam during the cyclic loading. Experimental results indicated that the diagonally reinforced coupling beam specimen could exhibit more ductile behavior compared to horizontally reinforced specimen. ACI318-14 code is applicable to design of coupling beam with diagonally reinforcement, however, that is overestimating the strength of horizontally reinforced coupling beam. It is remarkable that effective elastic stiffness values of both reinforcement details coupling beam significantly lees than ASCE 41-13.
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