Isotropic layered soil-structure interaction caused by stationary random excitations

Lin Jiahao; Gao Qiang; Zhong Wanxie; W.P. Howson; F.W.Williams

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Isotropic layered soil-structure interaction caused by stationary random excitations

Lin Jiahao 1 *,Gao Qiang 1,Zhong Wanxie 1,W.P. Howson 2,F.W.Williams 2

1.Department of Engineering Mechanics,Dalian University of Technology

2.Cardiff School of Engineering，Cardiff University

*Correspondence author

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Funding: the Natural Science Foundation of China， the doctoral research fund of the Chinese Ministry of Education，the National Basic Research Program of China，（No.10472023，20040141020，2005CB321704，10632030）

Opened online: 2 April 2008

Accepted by: none

Citation: Lin Jiahao,Gao Qiang,Zhong Wanxie.Isotropic layered soil-structure interaction caused by stationary random excitations[OL]. [ 2 April 2008] http://en.paper.edu.cn/en_releasepaper/content/20053

Soil-structure interaction emanating from seismic stationary random excitations is studied using the pseudo excitation method in combination with the precise integration method. The soil considered is a viscoelastic, transversely isotropic and layered half space and the structure which it supports is modelled by the finite element method. The excitation sources are random field ones that are stationary in the time domain and are located in the soil. The pseudo excitation method is used to transform this stationary random soil-structure interaction problem into a series of deterministic harmonic response analyses and the precise integration method is used to integrate the ordinary differential equations in the frequency-wavenumber domain. The power spectral densities of the soil-structure interaction responses caused by the stationary random excitations are investigated.

Keywords:Layered solids; Precise integration method; Pseudo-excitation method; Soil-structure interaction; Random waves.

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