二维土坝的两相动力分析

提出了一种分析饱和土坝动力反应的方法，考虑了土坝的两相介质特性，在固液耦联动力方程的基础上，选取固相位移，液相位移、孔隙水压作为场变量，采用伽辽金加权残数法进行有限元空间离散化，然后在时域上采用Ｗｉｌｓｏｎ－θ法进行逐步积分。该方法不仅能计算出固相位移和液相位移，而且能直接得到孔隙水压的反应过程。文中以一饱和土坝模型进行算例分析，并与将其作为单相介质时的结果进行了比较。该法可用于分析饱和介质的地震

Two - phase dynamic response of 2D -earth dam

The objective of this paper is to propose a general and efficient numerical procedure for analyzing the dynamic response of soil dams, which are considered as two phase system. With the displacements of fluid, displacements of solid frame and pressure of pore fluid all considered as unknown variables, the finite element spatial discretization of the coupled field equations with Galeikin's method is described and time integration for the resulting semi -- discrete finite element equations is discussed. The procedure in this paper can not only calculate the two phase displacements, but also give the porous pressures directly. In the end, a sample is presented. The results of saturated dam are compared with the results of dry dam. The method can be used in analyzing the earthquake response of sainted media.