Simulation of non-stationary ground motion processes (II)  

作　　者：梁建文 

机构地区：[1]Department of Civil Engineering, Tianjin University, Tianjin 300072, China

出　　处：《Acta Seismologica Sinica(English Edition)》2005年第3期368-374,共7页

基　　金：National Natural Science Foundation of China (50378063) and Excellent Young Teachers Program of Ministry of Education.

摘　　要：This paper proposes a method for simulation of non-stationary ground motion processes having the identical statis-tical feature, time-dependent power spectrum, with a given ground motion record, on the basis of review of simu-lation of non-stationary ground motion processes. The method has the following advantages: the sample processes are non-stationary both in amplitude and frequency, and both the amplitude and frequency non-stationarity depend on the target power spectrum; the power spectrum of any sample process does not necessarily accord with the tar-get power spectrum, but statistically, it strictly accords with the target power spectrum. Finally, the method is veri-fied by simulation of one acceleration record in Landers earthquake.This paper proposes a method for simulation of non-stationary ground motion processes having the identical statis-tical feature, time-dependent power spectrum, with a given ground motion record, on the basis of review of simu-lation of non-stationary ground motion processes. The method has the following advantages: the sample processes are non-stationary both in amplitude and frequency, and both the amplitude and frequency non-stationarity depend on the target power spectrum; the power spectrum of any sample process does not necessarily accord with the tar-get power spectrum, but statistically, it strictly accords with the target power spectrum. Finally, the method is veri-fied by simulation of one acceleration record in Landers earthquake.

关 键 词：non-stationary ground motion processes SIMULATION time-dependent power spectrum evolu-tionary power spectrum Morlet wavelet power spectrum 

分 类 号：P315.9[天文地球—地震学]