悬索桥考虑主缆振型的建模方法及其风振响应研究  

Modeling Approach and Wind-Induced Vibration Study on a Suspension Bridge Considering Main Cable Mode Shape

作　　者：邵亚会[1] 赵林[1] 张文明[1] 葛耀君[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2008年第4期58-63,75,共7页Structural Engineers

基　　金：国家自然科学基金青年基金资助项目(50408035):大跨度桥梁台风风环境实测与风振失效机理研究;国家自然科学基金资助项目(50538050):大型结构与特殊环境动力相互作用的数值试验

摘　　要：针对我国东南沿海某大跨度空间索面中央开槽式自锚悬索桥,建立了多种简繁不同的动力分析有限元模型,结合主梁节段模型风洞试验气动力参数,采用桥梁结构三维颤抖振分析程序数值化地再现了该悬索桥在设计风速下的风振响应全过程,定量地比较了考虑主缆振动形态对于桥梁结构动力特性及风致振动响应的影响,探讨了自锚式悬索桥合理建模的基本思路。Several dynamic FEM models, both simple and complicated, are built for a long span suspension bridge with central slotted box girders in coastal areas of southeastern China. Based on the aerodynamic parameters from the wind tunnel test of the bridge segmental model, and a 3 D bridge flutter-buffeting program, the whole process of wind-induced vibration of the bridge under designed wind speed is numerically redisplayed. The influence of cable mode shape on bridge dynamic characteristics and wind-induced vibration are compared with each other quantificationally. At last, the reasonable modeling approach of self-anchored suspension bridge is discussed.

关 键 词：自锚式悬索桥 主缆振动形态 动力特性 风致振动 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]