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在对小湾拱坝的三维系统进行地震分析中，考虑坝体与库水的耦合作用，分别采用线弹性模型及非线性模型进行计算，得到了系统的自振特性及动力反应结果．结果表明：坝水耦合作用提高了坝的整体质量，降低了自振频率；伸缩横缝削弱了拱坝的整体刚度，对拱坝地震反应产生较强的非线性影响
In the seismic analysis of Xiaowan arch dam’s 3D system, considering the coupling between the dam body and the reservoir water, linear elastic model and non-linear model are used respectively to calculate the vibration characteristics and dynamic response of the system. The results show that the dam-water coupling enhances the dam’s overall quality and reduces the natural frequency. The telescopic transverse joint weakens the overall stiffness of the arch dam and has a strong nonlinear effect on the seismic response of the arch dam