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.

• 장석준(충남대학교 건축공학과 박사과정) | Seok-Joon Jang
• 정권영(충남대학교 건축공학과 석사과정) | Gwon-Young Jeong
• 김선우(충남대학교 건설공학교육과 조교수) | Sun-Woo Kim
• 윤현도(충남대학교 건축공학과 교수) | Hyun-Do Yun Corresponding author
• 천영수(한국토지주택공사 토지주택연구원 연구위원) | Young-Soo Chun