文章以常山南门溪下承式钢管混凝土提篮拱桥为研究对象,并结合该桥原设计及现场变更后的实际施工工序,应用MIDAS/Civil软件,分别进行拱脚应力的仿真分析。从选定的两种荷载工况计算比较表明:不同的拱脚构造及拱脚不同的施工工序,局部应力存在着较大的差异;拱脚原设计的构造无论从整体受力还是局部应力分布上来说均优于实际施工的构造。 In this paper, the concrete-filled CFST arch bridge of Nanmenxi in Changshan is taken as the research object. Based on the original design of the bridge and the actual construction procedure after the alteration, the software MIDAS / Civil is used to simulate the stress of the arch foot. Comparing the selected two load conditions, the comparison shows that there are big differences in the local stress between the different arch structures and the different construction procedures of the arch and foot; the original design of the arch arch does not matter from the overall stress or the local stress distribution On the construction are better than the actual construction.