钢管混凝土拉索拱桥结构动力分析

Dynamic Analysis on Structure of Cable-supported Concrete-filled Steel Tube Arch Bridge

针对钢管混凝土拉索拱桥—天子山桥,建立空间有限元模型,计算了该桥的动力特性,并与实测结果进行了比较,表明所建模型能反映原结构。在此基础上分别讨论了索力变化和弹性模量变化对桥梁结构自振特性的影响。所得结果从桥梁动力分析角度表明拉索是该桥型的重要组成部分。

Finite element model of the Tianzishan Bridge is erected that is a cable-supported concrete-filled steel tube arch bridge.Its dynamic characteristics are calculated.The calculating results are compared with testing result of the bridge,which shows that the model can reflect the original structure.Then the impact of the different cable and elastic modulus variation on vibration features of the bridge structure are discussed.The results indicate that the cable is an important component of the bridge type.