Diagonal reinforced coupling beam of coupled shear walls can provide sufficient strength and stiffness to resist lateral force. However, the reinforcement details for coupling beams required by ACI 318 (2011) are difficult to construct because of the reinforcement congestion and confined interior area. This study presents experimental results about the seismic performance of coupling beams having bundled diagonal reinforcement to improve the workability. Experiments were conducted using half scaled precast coupling beams having an aspect ratio of 2.0. It was observed that the bundled diagonal reinforced coupling beams can develop seismic performance similar to the coupling beams with requirement details specified in ACI 318 (2011).

• 한상환(한양대학교 건축공학부) | Han, Sang Whan Corresponding author
• 권현욱(한양대학교 건축공학부) | Kwon, Hyun Woo
• 신명수(울산과학기술대학교 도시환경공학부) | Shin, Myung Su
• 이기학(세종대학교 건축공학부) | Lee, Ki Hak