钢管混凝土拉索组合拱桥,是钢筋混凝土桁式组合拱桥和钢管混凝土拱桥的结合和发展,兼有二者的优点,其结构新颖、跨越能力强、受力合理、轻盈美观、省工省料、施工简便,在多种拱桥结构中具有极佳的综合性能,被认为是桥梁建设史上的重大突破。文章以湖南天子山大桥为例,采用大型通用有限元软件ANSYS建立了空间有限元模型,并对该桥型进行了空间自振特性的分析。 It is a combination and development of CFST arch bridge and concrete-filled steel tube arch bridge, and has the advantages of both. The novel structure, strong ability to cross over, reasonable force, light and attractive appearance, labor saving and material saving, Construction is simple, with a variety of arch bridge structure has excellent overall performance, is considered to be a major breakthrough in the history of the bridge construction. Taking Tianzishan Bridge in Hunan Province as an example, the paper established the finite element model of space using the large-scale general finite element software ANSYS, and analyzed the natural vibration characteristics of the bridge.