Abstract
This paper presents a simulation method of earthquake motion. The proposed method is based on the nonstationary process model composed of not only evolutionary spectrum but also nonstationary phase that is named “time-varying phase”. Characteristics of simulated earthquake motions by the method are revealed in terms of peak values, their occurrence times, response spectra and evolutionary spectra. These are compared with the values of actual earthquake records as models of simulation and those of simulated earthquake motions by the conventional simulation method are also examined. As a result, it is found that simulated earthquake motions reflecting more closely characteristics of the original models can be generated by the proposed method than the conventional method.
