地震応答・相互作用

[CS10-51] Evaluation of the effect of surface soil amplification on the regression of the grand motion prediction equations

〇Tetsushi Kurita¹ (1.Tokyo Electric Power Services Co., Ltd.)

Keywords:ground motion prediction equation, amplification of subsurface ground, ground motion at ground surface, ground motion at base layer, plateaued term

The ground motion prediction equations (GMPEs) have been used as the empirical ground motion estimation method. Many GMPEs are obtained from records observed at the ground surface. On the other hand, the input seismic ground motions for design of civil engineering structures are often provided on the engineering base layer with Vs ≧ 300m/s. Therefore, in this study, the two kinds of GMPEs were compared. One is a GMPEs obtained from ground motions on the engineering base layer. The other is the GMPEs based on the observed records on the ground surface. As a result of the study, it was found that the regression coefficient had a significant effect on the plateaued term.