大跨度桥梁主梁沿跨向涡激振动响应计算

鲜荣; 廖海黎; 李明水

大跨度桥梁主梁沿跨向涡激振动响应计算

详细信息

作者简介:
鲜荣(1980- ),男,博士研究生,研究方向为桥梁与结构抗风抗震,电话:15882465796,E-mail:rxianok@163.com

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出版历程
- 收稿日期: 2008-04-28
- 刊出日期: 2008-12-25

Calculation of Spanwise Vortex-Induced Vibration Responses of Long-Span Bridge Girder

摘要

摘要: 为向抑振提供准确的参考数据,基于单自由度涡激振动经验线性模型,结合主梁振型、阻尼和涡激力相关性,导出了主梁沿跨向竖向、扭转涡激振动响应,建立了大跨度桥梁主梁沿跨向涡激振动描述体系,并探讨了节段模型涡激振动识别气动参数的方法.以一大跨度斜拉桥为例,计算了主梁在不同风攻角下涡激力相关性及沿跨向竖向、扭转涡激振动响应.结果表明,受涡激力相关性作用,涡激振动振幅沿跨向衰减较快.
- 涡激振动 /
- 经验线性模型 /
- 跨向相关性
Abstract: To provide accurate reference data to vibration restraint,based on the one-dimensional experienced linear VIV(vortex-induced vibration) model the vertical and torsional VIV spanwise responses of a bridge girder were deduced by synthetically considering factors such as mode shape,damping ratio and vortex-induced force correlation.A method was proposed to describe the VIV spanwise responses of a long-span bridge girder.A method to identify the aerodynamic parameters in the experienced linear VIV model through a section model test was discussed.By taking a long-span cable-stayed bridge as an example,the aerodynamic parameters were identified.In addition,the vortex-induced force correlation and the vertical and torsional VIV responses were calculated under different wind attack angles.The research result shows that the response amplitude of VIV influenced by the correlation decreases drastically with the increase of a spanwise distance.
- vortex-induced vibration /
- experienced linear model /
- spanwise correlation

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参考文献(1)

陈政清.桥梁风工程[M].北京:人民交通出版社,2005:129-131.[2] FUJINO Y.Wind-induced vibration and control of Tran-Tokyo Bay crossing bridge[J].Journal of Structure and Engineering,2002,128(8):1 012-1 025.[3] BATTISTA R C,PFEIL S.Reduction of vortex-induced oscillations of Rio-Niter6i bridge by dynamic control devices[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,84(3):273-288.[4] GUNTER S,LARSEN A.Reynolds number effects in the flow around a bluff bridge deck cross section[J].Journal of Wind Engineering and Industrial Aerodynamics,1998,74-76:829-838.[5] DIANA G,RESTA F,ZASSO A,et al.Wind effects on suspension bridges:The case of the Messina Strait bridge[J].Association Designénieurs Electriciens Sortis de L'iustitut Eletroteehnique Montefiore,2004,117(2):3-15.[6] 项海帆.现代桥梁抗风理论与实践[M].北京:人民交通出版社,2005:282.[7] 埃米尔希缪,罗伯特H斯坎伦.风对结构的作用--风工程导论[M].2版.刘尚培,项海帆,谢霁明,译.上海:同济大学出版社,1992:152.[8] LUCOR D,IMAS L,KARNIADAKIS G E.Vortex dislocations and force distribution of long flexible cylinders subjected to sheared flows[J].Journal of Fluids and Structures,2001,15(3-4):041-650.[9] LEE S,LEE J S,KIM J D.Prediction of vortex-induced wind loading on long-span bridges[J].Journal of Wind Engineering and Industrial Aerodynamics,1997,67-68:267-268.[10] YOSHIMURAA T,MIZUTAA Y,YAMADAB F,et al.Predietion of vortex-induced oscillations of a bridge girder with span-wise varying geometry[J].Joumal of Wind Engineering and Industrial Aerodynamics,2001,89 (14-15):1 717-1 728.[11] WILKINSON R H.Fluctuating pressures on an oscillating square prism:Part Ⅱ:Spanwise correlation and loading[J].Aero.Quarterly,1981,32(2):111-125.[12] 中华人民共和国交通部.JTG/T D60-01-2004公路桥梁抗风设计规范[S].北京:人民交通出版社,2004.[13] 朱乐东.桥梁涡激共振试验节段模型质量系统模拟与振幅修正方法[J].工程力学,2005,22(5):204-208.ZHU Ledong.Mass simulation and amplitude conversion of bridge sectional model test for vortex-excited resonance[J].Engineering Mechanics,2005,22(5):204-208.[14] KAWATANI M,KIM H,UEJIMA H.et al.Effects of turbulent flows on vortex-induced oscillation of bridge girders with basic seetious[J].Journal of Wind Engineering and Industrial Aerodynamics,1993,49:477-486.

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文章访问数: 1744
HTML全文浏览量: 77
PDF下载量: 420
被引次数: 0

大跨度桥梁主梁沿跨向涡激振动响应计算

作者简介: 鲜荣(1980- ),男,博士研究生,研究方向为桥梁与结构抗风抗震,电话:15882465796,E-mail:rxianok@163.com

计量

出版历程

Calculation of Spanwise Vortex-Induced Vibration Responses of Long-Span Bridge Girder

计量

出版历程

目录

作者简介:
鲜荣(1980- ),男,博士研究生,研究方向为桥梁与结构抗风抗震,电话:15882465796,E-mail:rxianok@163.com