独塔单索面斜拉桥节段模型风洞试验与计算分析  

Sectional Model Wind Tunnel Tests and Analysis of Cable-Stayed Bridge with Single Pylon and Single Cable Plane

作　　者：刘志文[1] 辛亚兵[1,2] 陈政清[1] 

机构地区：[1]湖南大学风工程试验研究中心,湖南长沙410082 [2]湖南省溆怀高速公路建设开发有限公司,湖南怀化418005

出　　处：《湖南大学学报（自然科学版）》2009年第10期7-12,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50608030)

摘　　要：以某主跨为136 m独塔单索面斜拉桥为工程背景,进行了该桥主梁节段模型测振及测力风洞试验,并在试验的基础上进行了风荷载计算和抖振响应计算.试验与计算结果表明:最大双悬臂状态和成桥状态在设计风速范围内发生了一些小幅涡振现象,但该桥涡振振幅满足规范要求;桥梁最大双悬臂状态和成桥状态颤振临界风速远大于颤振检验风速,大桥具有足够的颤振稳定性.Sectional model wind tunnel tests and analysis of a cable-stayed bridge of main span 136 m with single pylon and single cable plane were conducted. On this basis, wind load calculation and buffeting response analysis were conducted. It has been concluded that there are some vortex-induced vibration with little amplitudes in service and maximum double cantilever states respectively, which are under the allowable amplitude of vortex-induced vibration of bridge deck according to the wind resistant highway bridge design code, and the critical flutter speeds of bridge in service and in maximum cantilever stage respectively are higher than the flutter stability requirements according to wind resistant design specification of highway bridges. The bridge is stable under the wind loads.

关 键 词：独塔单索面斜拉桥 抗风性能 风洞试验 涡激共振 抖振响应 风荷载 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]