Seismic Liquefaction of Layered-Subsoil with Two Adjacent Foundations

Abstract eng:
Seismic liquefaction of subsoil with two adjacent foundations on layered soil half space is presented in this paper. A cone model for two foundations on layered soil half space is presented to study dynamic interaction between two foundations (which are two scattering sources), In the study the total stress field of the subsoil is divided into the free-field and the scattering field. Seed’s simplified method is adopted for the free-field analysis, while the cone-model is proposed to analyze dynamic scattering stress field, the shear stress field and the compressive stress field in layered stratum with two adjacent foundations are calculated by shear cone and compressive cone, respectively. In order to study dynamic interaction between two scattering sources, the stress wave fields of layered subsoil with two foundations are divided into six zones, the P wave and S wave are analyzed in each zone. This method is applied to evaluate the seismic deformation of subsoil under two adjacent foundations. Hopefully, the proposed method could be also available for other complicated earthquake engineering problems with multi-scattering sources .

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