To investigate an evaluation method of collapse mechanisms and the safety limit of RC buildings, a shake-table test of a 1/4 scale model of a 4story RC structure with shear walls was carried out. The specimen was designed to exhibit a frame-sway mechanism in both directions. In the test, the first-floor wall failed in flexure in the X-direction as designed; however, the first-floor wall in the Y-direction failed in shear, which did not match the design. Moreover, collapse mechanism and safety limit of the whole frame was discussed comparing the analytical result with the test result.

Evaluation of the residual capacity of RC structures damaged by earthquakes is necessary in judging the safety level of buildings. This paper proposes a method for evaluating the residual seismic capacity by accounting for differences in member deformation capacities. Within this study, a shake-table test of a 4-story RC structure with shear walls was conducted. The residual seismic capacity of the structure was evaluated and the validity was verified. The results show that the proposed residual capacity evaluation methods were able to capture the general tendency of the experimental results.

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