Stochastic Response of Ground and Its Implication for Spatial Variation of Earthquake Ground Motionby Takanori Harada, Miyazaki Univ, Japan,
Masanobu Shinozuka, Miyazaki Univ, Japan,
Document Type: Proceeding Paper
Part of: Structural Safety and Reliability
In order to account for the stochastic nature of free-field earthquake ground motions in the time and space domain, an engineering interpretation of frequency wave number representation of stochastic wave fields in three-space Cartesian coordinates is presented. The advantage of this interpretation in an engineering modeling of ground motions is demonstrated by introducing a digital simulation method and a numerical example. The digital simulation method is based on the stationary, homogeneous stochastic field theory, but can be easily extended to non-stationary, non-homogeneous stochastic earthquake wave model by employing an evolutionary power spectrum.
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