有色ノイズを受ける1次元地盤の非線形ランダム応答

概要

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The nonlinear random response of soil-column subjected to non-white excitation is dealt with. The formulation is based on the stochastic linearization method developed by Atalik and Utku, and the nonlinear hysteretic characteristic of soil is approximated by Wen's model. And its parameter is determined to simulate Ohsaki-Hara model in the prescribed strain range. The numerical method to deal with the arbitrary non-white excitation is also presented. In this method, the autocorrelation of input motion is used as the input of the derivative equation, and the external load term of covariance derivative matrix equation is given by the numerical solution of the vector derivative equation. This method is especially effective when it is difficult to find the linear filter equivalent to the target spectrum. The solutions are compared and well agree with the results of Monte-Carlo simulation.
社団法人日本建築学会の論文
1997-10-30