Seismic performance evaluation of tall and nonseismic-designed wall-type structures by shaking table tests

Two 1/5-scaled models of a nonseismic-designed wall-type structures were constructed and tested on a shaking table to evaluate their seismic performances. The prototype structure had shear walls only along the short side of the structure, which was a typical structural plan of apartment buildings constructed by tunnel forms before the seismic design code was enforced in Korea in 1989. Of the two models, one model was reinforced by steel angle sections placed on the walls and under the slabs for seismic retrofit. They were tested on a shaking table to investigate performance for earthquake ground excitations with various intensities. The experimental results showed that the nonseismic-designed wall-type structure without seismic retrofit failed to satisfy the life-safety and collapse-prevention performance objectives, whereas the retrofitted structure satisfied all the performance objectives.