2020 Volume 20 Issue 1 Pages 1_194-1_208
In this study, authors proposed a method to convert two artificial seismic waves which are both compatible with Japanese Seismic Code into a pair of waves which are compatible with bi-axial response spectrum. Secondly, in order to evaluate the seismic behavior of 20-story base isolated building, three-dimensional seismic response analysis was carried out by bi-axial response spectrum-compatible accelerograms with different acceleration trajectories. As a result, there found significant differences in the part of response values between uni-direction input and bi-direction inputs. It was shown that seismic performance evaluation considering actual behavior was possible by conducting analysis by horizontal bi-direction inputs. In addition, it was shown that installed cylinder-type dampers in two orthogonal directions is an effective method for seismic design against for uncertain bi-directional input.
