ABSTRACT

This paper presents a parametric investigation on the effects of viscous coupling on the seismic responses of subway stations in a saturated poroelastic half-space which is modeled as a two-phase medium by the Biot’s theory. Moreover, an equivalent single-phase model for the saturated poroelastic half-space is introduced, and comparisons between the single-phase solutions and the two-phase solutions are made. The results are obtained by a finite element-indirect boundary element coupling method. The study shows that the viscous coupling has significant influences on the seismic internal forces and deformation of the subway stations, and the single-phase approximation can cause large errors.

摘要

本文介绍了粘性耦合对地铁车站地震响应影响的参数研究，该饱和多孔弹性半空间由 Biot 理论建模为两相介质。此外，还引入了饱和多孔弹性半空间的等效单相模型，并对单相解和两相解进行了比较。结果是通过有限元-间接边界元耦合方法获得的。研究表明，粘性耦合对地铁车站的地震内力和变形有显着影响，单相逼近会导致较大的误差。