Ground motion analysis in nonlinear soil site with random media

In this article,by incorporating equivalent linearization method and the orthogonal expansion method into the wave finite element analysis of scattering problem, an analytical methodology for the evaluation of seismic response of nonlinear soil site with uncertain properties is proposed. Example is given to show the applicability of the methodology. The results show that the randomness of the site media has important effect on seismic site response, the randomness has greater influence on the variation of accelerations than on displacements. The coupling of the nonlinearity and the randomness of soil enhances the effect of randomness on the soil site.