超大跨度悬索桥长吊索涡振特性及其控制研究  

Research on Vortex-induced Vibration Characteristics and Its Control of Long Suspenders of Super-Long-Span Suspension Bridge

作　　者：林海峰 侯斌[2] 王浩[3] 王仁贵[2] 陶天友 郜辉 LIN Hai-feng;HOU Bin;WANG Hao;WANG Ren-gui;TAO Tian-you;GAO Hui(Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing 210004,China;CCCCHighwayConsultants Co.Ltd.,Beijing100010,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]江苏省交通工程建设局,南京市210004 [2]中交公路规划设计院有限公司,北京市100010 [3]东南大学土木工程学院,南京市

出　　处：《公路》2023年第6期58-64,共7页Highway

基　　金：国家重点研发计划项目,项目编号2021YFB1600304。

摘　　要：针对超大跨度悬索桥长吊索风振突出的问题,以张靖皋长江大桥为背景,开展了超大跨度悬索桥长吊索涡振特性及其控制研究。基于嵌套网格技术,开展了2种直径长吊索涡振的数值模拟,并分析了吊索低阶与高阶涡振响应的特性。采用减振锤作为控制措施,开展了阻尼器参数设计,并通过节段模型风洞试验验证了减振装置对吊索涡振的控制效果。研究结果表明:不同直径的吊索在单索股和双索股情况下均可能发生涡振;不同阶次模态发生涡振的位移振幅接近,但高阶涡振的加速度幅值显著增加;考虑涡振对吊索疲劳性能的影响,采用减振锤能够有效抑制涡振响应。Regarding the prominent wind-induced vibrations observed in long suspenders of superlong-span suspension bridges,the vortex-induced vibration(VIV)and its control of the suspenders are conducted by taking the Zhang-Jing-gao Yangtze River Bridge as an example.Based on the overset-grid technology,the VIVs of suspenders with two diameters are investigated via numerical simulation.Then,the properties of VIV responses at low and high modes are analyzed.Using the damping hammer for vibration control,the parameters of the damper are designed and the corresponding mitigation effect on the VIVs of suspenders is verified through section-model wind tunnel test.The results show that the VIVs of suspenders with different diameters tend to emerge for component with either single or double slings.The amplitudes of displacement for different modes are similar when the VIV occurs,but the acceleration increases remarkably at high-order modes.Considering the effect of VIV on the fatigue performance,the VIV can be effectively mitigated by the damping hammer.

关 键 词：悬索桥 长吊索 涡振 风洞试验 数值模拟 

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