在混凝土重力坝有限元应力分析中，坝踵和坝趾的应力随网格剖分尺寸的减小而急剧增大。
Based on the dam heel and toes stress calculated by FEM changes very much as the mesh size reduces.
针对该问题，提出局部等效应力方法，即对坝基面坝踵和坝趾局部区域进行局部等效处理，坝基面中间大部分区域仍采用有限元计算。
In this paper, the assumption of equivalent stress method only used near the dam heel and toe and the middle regions stress USES the FEM calculated stress.
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