摘要
桥梁结构的动力特性(固有频率和振型)是结构动力分析和抗震分析的重要参数。以东莞水道特大桥(主桥)为研究对象,通过建立空间结构模型,计算分析了钢管混凝土拱桥的动力特性,为该类桥梁的抗震设计研究提供了分析的基础。计算结果表明:该种桥型横向刚度较竖向刚度弱,桥梁低阶以拱肋横向振动为主。
The dynamic behavior （natural frequencies,vibration shapes of a bridge）is the important parameter for the dynamic and seismic analysis of structure.Dongguan channel bridge has been taken as a research project.The space model of structure was built up and the dynamic property of concrete filled steel tube arch bridge Was calculated and analyzed.A useful exploration on this type of bridge is made for the seismic design.The obtained results indicate that the transverse stiffness of the bridge is smaller than its vertical stifness,and the transverse vibrations of arches are dominated in the main part of its lower order modes.
出处
《科技信息》
2008年第22期93-94,共2页
Science & Technology Information
关键词
钢管混凝土拱桥
有限元方法
频率
振型
concrete filled steel tubular arch bridge
finite element method
frequency
mode
