Generation Method of Strong-Motion Considering Spatial Correlation for Risk Assessment

Abstract

When conducting seismic risk assessment for portfolios distributed over a wide area, it is necessary to consider the spatial correlation of ground motions. In addition, in order to link risk assessment to disaster prevention measures, it is necessary not only to obtain a E.P. (Exceedance Probability) curve that represents the relationship between damage and exceedance probability, but also to indicate the distribution of ground motions that constitute the E.P. curve. In this study, based on the ground motion generation method by mode synthesis by previous studies. In this method, the trend component is replaced by a GMPE and mode-synthesized using the adjusted singular value, so that the mean value and the level of variation of the generated seismic motion are approximated to the observed record.