所属 神奈川大学 工学部 建築学科
|概要||RC shear walls coupled with beams are becoming widely used for high-rise buildings in Japan. Since short-span coupling beams are subjected to large displacement during an earthquake, high ductility and excellent energy absorption performance are required.|
RC coupling beams with low-yield-point steel damper in the mid-span (coupling beam damper) have been developed and experimentally investigated in this study. Steel dampers in the mid-span are embedded into the RC beams at the both ends, and embedded lengths are ranging from 2 to 3.5 times as long as steel depth.
The coupling beam dampers provide the stable hysteretic performance up to 1/20 of drift angle, and equivalent damping coefficients of 20 to 30%. Sufficient amount of shear reinforcement needs to be arranged, so as to transfer shear force from steel damper to RC beams. Shear reinforcements are more effective when arranged in the tip of RC beams.