【摘要】 无限地基的辐射阻尼效应是影响坝体地震反应的重要因素。本文采用黏弹性边界并在非线性有限元软件ABAQUS软件上成功实施,经与理论解的结果对比,具有较高的求解精度。文中以典型的Koyna重力坝地震反应分析为例,比较了黏弹性边界与传统的固定边界无质量地基的计算结果,特别是利用混凝土损伤模型对Koyna重力坝遭遇强震时震害现象进行了初步分析,得到了大坝下游折坡处与实际遭受的地震破坏现象和破坏程度基本一致的结果。更多还原

【Abstract】 Radiation damping effect is an important factor affecting seismic response of dam structure.In this paper the viscous-spring artificial boundary condition is adapted in the dynamic response analysis of gravity dam and the numerical implementation is provided in ABAQUS.It is proved that the method has high solution precision comparing with the theory resolution.Taking the typical gravity dam of Koyna as an example,the damaged plastic model is used in the analysis of the strong seismic response of dam,and it is shown that the damage result is similar to conventional method of fixed boundary with mass less foundation.Therefore the conclusion has some reference value on seismic study of gravity dam.更多还原