鳊鱼洲长江大桥矩形钢箱梁涡振性能及控制措施研究  

Vortex-induced vibration performance of Bianyuzhou Yangtze River Bridge with rectangular steel box girder and aerodynamic countermeasure research

作　　者：李志国[1,2] 黄林 高贵[3] 李世文 宁伯伟 LI Zhiguo;HUANG Lin;GAO Gui;LI Shiwen;NING Bowei(Research Center for Wind Engineering,Southwest Jiaotong University,Chengdu 610031,China;Wind Engineering Key Laborotary of Sichuan Province,Chengdu 610031,China;Wuhan-Jiujiang Railway Passenger Dedicated Line Hubei Corporation Limited,Wuhan 430201,China;China Railway Major Bridge Reconnaissance&Design Institute Corporation Limited,Wuhan 430050,China)

机构地区：[1]西南交通大学风工程试验研究中心,四川成都610031 [2]风工程四川省重点实验室,四川成都610031 [3]武九铁路客运专线湖北有限责任公司,湖北武汉430201 [4]中铁大桥勘测设计院集团有限公司,湖北武汉430050

出　　处：《铁道科学与工程学报》2021年第7期1790-1797,共8页Journal of Railway Science and Engineering

基　　金：中国铁路总公司科技研究开发计划重点课题(AJZH2020-001)。

摘　　要：鳊鱼洲长江大桥为铁路斜拉桥,其矩形钢箱梁主梁在常遇风速下会发生涡激振动。为了抑制其主梁涡激振动,通过一系列风洞试验,研究减小栏杆透风率、增设裙板、导流板及风嘴等气动措施对矩形钢箱梁主梁涡振性能的影响。试验结果表明:减小栏杆透风率、增设裙板、导流板不能有效提高矩形钢箱梁的涡振性能;三角形风嘴能够适当降低主梁的竖弯涡振,但对扭转涡振无明显作用。提出了一种带平台的三角形下行风嘴,可完全消除矩形钢箱梁的涡振现象,并通过1:25大尺度节段模型风洞试验验证了该措施的有效性。论文研究成果可为大跨度铁路斜拉桥钢箱梁的涡振制振设计提供参考。Vortex-induced vibration(VIV)of Bianyuzhou Yangtze River Bridge with rectangular steel box girder often occurs at frequent wind speeds.In order to suppress VIV of the girder,a series of wind tunnel tests were carried out to study the effects of different aerodynamic measures on the vortex-induced vibration performance of the girder,such as reducing the ventilation rate of the pavement railing,installing apron,baffle and wind fairing.The results show that the VIV performance of rectangular steel box girder can not be effectively improved by the aerodynamic measures of reducing the ventilation rate of the pavement railing,installing apron and baffle.Installing triangular wind fairing can reduce the amplitude of the vertical VIV properly,but not reduce the torsional VIV.The VIV suppression measure of triangular downward wind fairing with platform was proposed.The test results show that this measure can effectively suppress VIV of the girder.And it is verified by a section model wind tunnel test with a scale of 1:25.The research results can provide reference for the VIV performance design of rectangular steel box girder of long span railway cable-stayed bridges.

关 键 词：矩形钢箱梁 涡激振动 气动措施 下行风嘴 节段模型风洞试验 

分 类 号：U24[交通运输工程—道路与铁道工程]