To investigate the cyclic characteristics of the retrofitted exterior joints of RC frame with haunch, 70% scaled 6 beam-column exterior joint subassemblies were designed according to design guideline according to 1988 and tested with cyclic loading up to 3.5% story drift ratio. During the experiments axial forces are applied to columns to simulate gravity load. Experimental results shows that the strength of retrofitted specimens was increased steadily until 2.5% story drift ratio and their strengths increased more than 1.7 times of the non-retrofitted in case that main bar was bent away from exterior joint. The joint strength and effective stiffness of the retrofitted specimen was increased and results in more deformation capacity compared to the non-retrofitted.

• 이영욱(군산대학교 건축공학과) | Young Wook Lee (Department of Architecture & Building Engineering, Kunsan National University) Corresponding author
• 박형권(대들보구조안전기술단) | Hyeong Kyeon Park (Deadeulbo Structural Engineering Co.)