因果的履歴減衰モデルの非線形化と因果的散乱減衰モデルの設定に関する基礎的検討 : 振動数と歪振幅への依存性を考慮した地盤の非線形地震応答解析法(その1)

概要

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It is important to estimate the seismic behavior of the surface soil layer to calculate the input earthquake motion to the building because the surface layer amplifies the motion. It is also known that the soil damping depends both frequency and strain, and the damping is considered as the sum of the hysteretic damping and the scattering damping. There were many investigations to propose the calculation method considering both dependencies, but practical methods were few. The author studies the nonlinear analysis considering both dependencies. In this paper, the time history nonlinear ground response analysis method using the causal models for both the hysteretic damping and the scattering damping was proposed. The basic characteristics of the proposed method were studied using the 1 DOF model and the validity of the method was confirmed.
2007-06-30