单拱肋外倾式钢管混凝土拱桥动力特性分析

摘要

章江大桥为国内少有的单拱肋外倾式钢管混凝土拱桥.通过建立ANSYS空间有限元模型来计算分析其自振频率和振型,着重研究主拱肋核心混凝土标号、稳定拱肋外倾角度、横撑与斜撑布置形式以及拱肋与桥面联结区刚度等结构参数对结构动力特性的影响.%As a few extroversion CFST arch bridge with single rib in China, Zhangjiang Bridge is taken as an example to calculate natural frequencies and mode shapes by establishing a spatial FEA model of ANSYS software. And the influences of central concrete grade of main arch rib, outward angle of balance arch, form of flying shore and raking shore and the jointing stiffness of arch rib and deck on dynamic characteristics of mian arch are researched. The results have certain reference value for other same bridges.