基于黏性裂缝模型理论，在实体单元中嵌入黏性界面单元（Cohesive Interface Elements），对 Koyna 重力坝的强震破坏过程进行了二维有限元模拟和分析，并与其它数值方法的结果进行了对比。结果表明，大坝的破坏开裂分布与 Koyna 大坝实际破坏情况及文献中的模型试验结果基本相符，说明黏性界面单元可以很好地模拟裂缝的断裂和扩展，验证了该方法的有效性。%By embedding cohesive interface elements into solid finite element meshes,two-dimensional crack propagation of Koyna gravity dam under earthquakes was simulated.The simulated cracking process and final crack pattern were compared favorably with experimental results and numerical ones available in literatures,they agreed well.It was shown that the proposed method is effective to simulate crack propagation and expanding.
展开▼
