SIMULATION OF STRONG MOTIONS USING PARAMETERS BASED ON RECORDED ACCELEROGRAMS

It is generally difficult to predict with certain accuracy when and where a big earthquake will take place. We need to take into account the strong effect of severe ground motions of shear wave on the dynamic behavior of buildings and civil structures. We simulate strong motions of pure shear wave and synthesize small motions, using the recorded accelerograms at a site on a base rock in northern Osaka, Japan. By making use of a stochastic technique, we can easily introduce higher frequency contents in the motions and apply the technique to the synthesis of small waves that are regarded as green functions. We also introduce to the analysis the useful relationships among the seismic moment 0 M and the time duration d T , 0 M and the corner frequency c f , and 0 M and the