抄録
The design ground motions are usually defined to be compatible with the given response spectrum which is a useful measure of the linear dynamic response of the structure. Recently, a new synthesis method was proposed by Masuda et al. that can make artificial ground motions compatible with the given time-frequency characteristics as well as the given response spectra. Because the maximum elasto-plastic deformation level depends on the nonstationary load history applied to the structure, the structural response to the ground motions designed by that method are expected to be less-variable even in the elasto-plastic region. In this paper, a number of artificial ground motions are synthesized, and elasto-plastic response analyses are carried out to examine the variance of the structural response in the elasto-plastic region. It is revealed that the variance of the structural response to the ground motions designed by Masuda's method is less than one to the ground motions by the conventional design method.
