初始主应力偏转角α_0对土石坝动力计算结果的影响

Effects of the initial rotation angle of principal stress on dynamic stability analysis of earth dam

本文把反映初始主应力偏转角α０影响的砂砾料动强度模式和残余孔隙水压力模式引入土石坝动力反应计算中，编制了相应的有限元计算程序，通过计算比较了考虑α０影响与通常计算中不考虑α０影响的动力反应分析结果的差异，表明在地震烈度较小时，不考虑α０影响的动力计算将低估坝体破坏区的范围．

In this paper a finite element program for dynamic analysis is developed,It can be used to analyze the dynamic stability of earth dam with consideration of the initial rotation angle.The differences between the dynamic analysis with and without considering the initial rotation angle are compared through computation.The conclusion is that the dynamic failure zones obtained from computation with consideration of the effect of initial rotation angle is large than that without consideration of the effect.