Basic theory of nonlinear FEM analysis and its realization in ANSYS were studied. Accomplish stability analysis of high arch dam abutment based on nonlinear FEM analysis.

因此对大型结构分析软件ANSYS的三维非线性计算功能进行了深入研究，在此基础上完成了基于非线性有限单元法的高拱坝坝肩稳定计算分析。

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Through analysis on theory, the author finds the basic regularity in transmitting the supporting force by the arch supporting force of tunnel with circular arch section.

通过细致的理论分析，笔者初步找出了圆拱状断面隧道拱壁支承力传递的基本规律。

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This paper analyses force of arch structure in terms of theory, points out constructional Limitations of arch structure applying prefabricated component. It provides basis for guiding construction.

从理论上对拱上结构进行受力分析，得出拱上结构采用预制混凝土块浆砌施工有一定局限性的结论，并以此为依据指导施工。

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