武汉天兴洲公铁两用长江大桥抗风性能研究  

Study of Wind-Resistant Performance of Main Bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge

作　　者：郑史雄[1] 徐伟[2] 高宗余[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中铁大桥勘测设计院有限公司,湖北武汉430050

出　　处：《桥梁建设》2009年第4期1-4,8,共5页Bridge Construction

基　　金：铁道部科技研究开发项目(2004G028-D)

摘　　要：针对目前我国最大跨度钢桁梁斜拉桥武汉天兴洲公铁两用长江大桥主桥的抗风性能进行风洞试验及分析研究,包括气动参数测量风洞试验、主梁节段模型风洞试验、施工状态气弹模型风洞试验、斜拉索风雨振动风洞试验及塔梁交汇区风场对行车安全性影响分析等。研究表明,无论成桥状态或施工状态,其主梁断面具备足够的抗风稳定性,在相应设计风速作用下,其抖振响应性能满足要求,斜拉索虽存在发生风雨振动的可能,但可以通过气动措施或机械措施加以改善,塔梁交汇处风场特性较为特殊,在强风作用下可能会引起驾乘人员不适。The wind tunnel test and analytical study were made for the wind-resistant performance of the main bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge, currently the longest span steel truss girder cable-stayed bridge in China, in which the aerodynamic parameter measurement test, the main girder sectional model test, the aeroelastic model test for the bridge in construction state, the stay cable rain vibration test as well as the analysis of influence of the wind field at juncture area of the girder and pylon on the safe traveling of vehicles were included. The results of the study indicate that for the bridge either in the completion state or construction state, the section of the main girder has sufficient stability of wind resistance. Under the action of the corresponding designed wind velocity, the buffeting response of the bridge can satisfy the required performance. Though the rain vibration of the stay cables may oc- cur, the vibration can be improved by the aerodynamic or mechanical measures. The characteristic of the wind field at juncture area of the girder and pylon is rather special and will possibly make the passengers uncomfortable in case of strong wind.

关 键 词：铁路公路两用桥 斜拉桥 桁梁桥 风洞试验 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U446[交通运输工程—道路与铁道工程]