Abstract
When the severe earthquakes took place, many buildings ceased functioning, and required costly structural repairs. Seismic retrofit was required for protecting those buildings from those earthquakes. So, authors have proposed seismic retrofit method for the R/C structures. This is a method for absorbing the seismic energy by the buckling-restrained brace type of the steel damper with low yielding strength. In the R/C frame, the damper is directly connected to the side of beam end with post tensioned P/C tendon. In order to clarify the effectiveness of this method, static cyclic loading was carried out. It had proved that this method had good performance for R/C frame under static cyclic loading. In this study, the dynamic cyclic loading test for R/C frame is carried out. As a result, failure mode of R/C frame under dynamic test is difference from that under static test, but deformation capacity of R/C frame under dynamic test is equal to that under static test. This steel damper in the frame absorbs input energy, and it has clarified that this method is effective.
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