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本文应用断裂力学方法分析桓仁大坝劈头裂缝的稳定性。用等参数奇异单元法计算不同裂缝深度在各种荷载及边界条件下的应力强度因子,並用等效裂缝长度法推求大坝混凝土的断裂韧度值。
In this paper, fracture mechanics method is used to analyze the stability of fractured head of Huanren Dam. The stress intensity factor of different crack depth under various loads and boundary conditions was calculated by using the equivalent parameter singular element method, and the fracture toughness value of the dam concrete was deduced by equivalent crack length method.