中文摘要：

传统的线弹性模型不能描述混凝土岩石在遭遇超出其抗拉、抗压强度的外荷载作用时所表现的非线性性能以及应力重分布现象,本文从损伤力学的角度出发,坝体-地基体系分别采用混凝土损伤塑性模型—D-P弹塑性模型及混凝土损伤塑性模型-修正的岩石损伤塑性模型,对典型的Koyna重力坝进行动力非线性响应分析。计算结果表明实际坝体的损坏可能是由于地基破坏造成的。

英文摘要：

The traditional linear elastic model can not describe nonlinear behavior or stress redistribution of concrete mematerials or rock materials if their tensile or compressive strength are exceeded under certain external load.In damage mechanics view,a dam-foundation system was simulated with a concrete damage plasticity model,a D-P plastic model,a concrete damage plasticity model and a rock modified damage plasticity model,respectively,to analyze the dynamic nonlinear responses of a typical Koyna gravity dam.The results show that the actual damage to the dam may be caused by the damage to the foundation.