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本文用平面非线性有限元法分析有软弱夹层的复杂岩基上混凝土坝坝体和坝基的应力和稳定问题,并编写有相应的计算程序。块体采用四结点等参数单元,软弱结构面则采用古德曼节理单元,并引入三结点的节理单元以模拟软弱结构面的尖灭端点。用初应力法作非线性迭代运算。剪切破坏判别采用莫尔—库仓准则。可以计算均质及复杂岩基上坝体、坝基的应力和位移以及破坏区的范围;还可模拟超载加荷,分析坝基的抗滑稳定性;同样可用于地下洞室围岩应力、位移和稳定的计算。
In this paper, the plane nonlinear finite element method is used to analyze the stress and stability of concrete dam body and dam foundation on the complex rock foundation with weak interbed. Corresponding calculation programs are also prepared. The block uses four nodes and other parametric units. The weak structural plane adopts Goodman joint unit and the three-node joint unit is introduced to simulate the end point of weak structure plane. Initial stress method for non-linear iterative operation. Shear damage identification using Mole - warehouse rules. Can calculate the stress and displacement of dam body and dam foundation on homogeneous and complex rock foundation and the range of damaged area. It can also simulate overload loading and analyze the stability of dam foundation against sliding. It can also be used for the stress and displacement of surrounding rock of underground caverns Stable calculation.