Stochastic Response of Ground and Its Implication for Spatial Variation of Earthquake Ground Motion

by 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.

Subject Headings: Ground motion | Numerical models | Stochastic processes | Earthquakes | Simulation models | Homogeneity | Wave spectrum | Graphic methods

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