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用非线性有限元方法研究了拱坝的非线性地震响应．研究中考虑了坝体、坝基材料，坝体浇筑横缝和预留周边缝等各种非线性的影响．混凝土材料的弹塑性模型考虑了材料的软化、开裂等．坝体和接缝材料的屈服应力和失效应力假定与塑性功的累积有关．用断裂能和等效裂缝应变表征缝面上正应力的变化规律．最后，在时域内对一实际高拱坝进行了数值分析，并给出了主要成果．
Nonlinear seismic response of arch dam with nonlinear finite element method. In the study, various non-linear influences such as dam body, dam foundation material, pouring transverse joint of dam body and reserving peripheral seam are taken into account. The elastoplastic model of concrete material takes into account the material softening, cracking and the like. The yield stress and failure stress of the dam and joint materials are assumed to be related to the accumulation of plastic work. The regularity of normal stress on seam surface is characterized by fracture energy and equivalent crack strain. Finally, a numerical analysis of a real high arch dam in the time domain is given and the main results are given.