EFFECT OF ANCHORAGE REBARS APPLYING TO MID-STORY PIN COLUMN BASE CONNECTION ON STRESS TRANSFER MECHANISM AND ULTIMATE SHEAR STRENGTH UNDER HORIZONTAL FORCE

Mid-story pin column system has been proposed to realize beam yielding mechanism of a steel moment-resisting frame. In this system, connection is applied inbetween the upper and lower RC extended from base control moment demands on both ends first story column. An exposed-type adopted as connected by single anchor bolt. Static cyclic horizontal loading tests partial frame consisting second floor beams showed with exhibited stable hysteresis performance up drift angle 0.05 rad, remaining in elastic. addition, bolt slippage at while problem was solved when an stiffened cross-shaped four shear plates. A cover plate also welded top plates surface bearing pressure are called set, or ABS, hereinafter. Ensuring reliable seismic frame, damages have be minimized. So far, compressive stress transfer clarified, ultimate strength evaluated previous study.