Dongsheng Du1,*, Sheng Shi1, Weizhi Xu1, Chen Kong2, Shuguang Wang1, Weiwei Li1
CMES-Computer Modeling in Engineering & Sciences, Vol.124, No.1, pp. 265-285, 2020, DOI:10.32604/cmes.2020.09151
Abstract The intensity non-stationarity is one of the most important features of
earthquake records. Modeling of this feature is significant to the generation of arti-
ficial earthquake waves. Based on the theory of phase difference spectrum, an
intensity non-stationary envelope function with log-normal form is proposed.
Through a tremendous amount of earthquake records downloaded on Kik-net, a
parameter fitting procedure using the genetic algorithm is conducted to obtain
the value of model parameters under different magnitudes, epicenter distances
and site conditions. A numerical example is presented to describe the procedure
of generating fully non-stationary ground motions via spectral representation, and
the… More >
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