三维非轴对称饱和土动力刚度矩阵

摘要

基于三维非轴对称饱和弹性土层动力响应分析的基本解 ，推导出有限厚饱和土层和饱和半空间精确动力刚度矩阵，再由层间内界面连续条件建立三 维 非轴对称分层饱和土体总刚方程。该方法不要求对土体自然层(有限厚度)作薄层离散，也可 方便处理层内荷载的影响；总刚方程可直接用于计算边界元法中边界积分方程要求的影响函 数(GREEN函数)。%Based on the fundamental solutions of governing dynamic equa tions of the 3-D non-axisymmetric saturated soils,a layered saturated stiffnes s matrix and a saturated half-space stiffness matrix are derived exactly.The gl obal stiffness equation of a multi-layered half-space is assembled by using th e layer and half space stiffness matrices on the basis of continuity of traction s and fluid flow at layer interfaces,which would not need to disperse the natura l layered soils (finite thickness),and it is easy to deal with in-layer loading in global stiffness equation,and the GREEN's functions needed by boundary integ ral equation in boundary element method can be obtained directly by means of glo bal stiffness equation.