大跨度拱桥作为生命线工程之一,它的破坏会造成震后救灾工作的巨大困难,使次生灾害加重,因此,对大跨度拱桥进行抗震分析是十分必要的。文章采用大型通用有限元程序ANSYS对某大跨度外倾式拱桥进行反应谱分析和时程分析研究。结果表明对于大跨度柔性结构,由于非线性因素的影响,反应谱方法的计算误差较大,需要进行时程分析计算。 Long-span arch bridge, as one of the lifeline projects, its destruction will cause tremendous difficulties in relief work after the earthquake, so that secondary disasters aggravate. Therefore, seismic analysis of long-span arch bridges is very necessary. In this paper, a large-scale finite element program ANSYS is used to conduct response spectrum analysis and time history analysis of a long-span camber arch bridge. The results show that for long-span flexible structures, the response spectrum method has a large calculation error due to nonlinear factors and needs time-history analysis.