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通过对拱坝非线性开裂问题的研究提出了拱坝非线性分载位移法的计算模型，推导了非线性状态下，拱坝截面内力与曲率关系的公式。确定了拱坝开裂分析中混凝土破坏条件。拱坝非线性开裂分析的分载位移法可用于拱坝非线性静动力分析、超载分析和开裂问题研究，可模拟坝的破坏过程。根据本文公式、模型编制的程序已用于拉西瓦水电站拱坝、小湾水电站拱坝的非线性开裂分析和超载分析。实例表明，该方法正确，成果合理，可用于解决实际工程问题
Based on the study on the nonlinear cracking of arch dam, the calculation model of nonlinear load-displacement of arch dam is proposed and the formula of the relationship between internal force and curvature of arch dam under nonlinear condition is deduced. Determine the condition of concrete failure in arch dam cracking analysis. Displacement displacement method for arch dam nonlinear crack analysis can be used for nonlinear damped dynamic analysis of arch dam, overload analysis and cracking problems, dam failure process can be simulated. According to the formula in this paper, the program of model preparation has been used in the nonlinear cracking analysis and overloading analysis of arch dam of Laxiwa hydropower station and arch dam of Xiaowan hydropower station. The example shows that this method is correct and the result is reasonable, which can be used to solve practical engineering problems