基于联合有限-离散元法的混凝土重力坝地震破坏过程仿真

Seismic Rupture Process Simulation of Concrete Gravity Dam based on the Combined Finite-discrete Element Method

许多工程和科学问题都涉及从连续介质到非连续介质的转化。混凝土坝遭遇强烈地震导致坝体严重受损就是一个典型的例子。为了预测强震下混凝土坝的动力响应,需要采用一套合适的数值方法进行从连续介质到非连续介质转化的数值模拟,从而实现结构破坏的全过程数值仿真分析。应用联合有限-离散元法结合弥散式旋转裂缝模型分析了地震作用下混凝土重力坝动力破坏过程。数值计算结果得出的最终破坏形态与模型试验结果基本一致。

Many industrial and scientific problems are characterized by a transformation from a continuum to a discontinuum state. The severe damage of concrete dams due to strong earthquake is a typical example. To predict the seismic responses of concrete gravity dam under the strong earthquake, a proper numerical method was needed for the simulation of transition process from a continuum to discontinuum in order to realize the whole process numerical simulation analysis of structural collapse. This paper uses the combined finite-discrete element method with smeared rotating crack model to analyze the seismic rupture process simulation of concrete gravity dam under the action of earthquake. The comparison between experimental and numerical results showed that the final computed ruptured configuration agreed with the available model test results in the literature.