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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

39卷

期数:

2022年05期

页码:

84-93

栏目:

结构工程

出版日期:

2022-09-30

文章信息/Info

Title:

Study on Flutter Stability of Long-span Asymmetric Suspension Bridges

文章编号:

1673-2049(2022)05-0084-10

作者:

郝键铭¹,张尧尧¹,舒 鹏²

(1. 长安大学 公路学院,陕西 西安 710064; 2. 重庆市市政设计研究院有限公司,重庆 400020)

Author(s):

HAO Jian-ming¹, ZHANG Yao-yao¹, SHU Peng²

(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Chongqing Municipal Research Institute of Design, Chongqing 400020, China)

关键词:

非对称悬索桥;  颤振稳定性;  扭转频率比;  颤振临界风速

Keywords:

asymmetric suspension bridge;  flutter stability;  torsional frequency ratio;  flutter critical wind speed

分类号:

U448.25

DOI:

10.19815/j.jace.2022.05063

文献标志码:

A

摘要:

为了研究大跨度非对称悬索桥在不同非对称类型下的颤振稳定性,以主跨为628 m的某主缆不等高支承悬索桥为工程背景,基于全模态的三维频域颤振分析方法对悬索桥进行颤振稳定性分析。利用ANSYS建立了主缆不等高支承(支承高差0～40 m)和边跨跨度非对称(边跨跨度差0～40 m)悬索桥有限元分析模型,并编制相应双参数搜索迭代的APDL计算程序进行三维颤振稳定性分析。结果表明:在构造不等高支承悬索桥时,随着支承高差的增大,低阶模态频率变化较小,高阶模态范围逐渐减小; 弯扭频率比随着支承高差增加而不断减少,高差越大弯扭频率比降低越快; 桥梁颤振临界风速随着支承高差增大而不断降低,使得由于主缆不等高支承高差所引起的非对称结构形式对大跨度悬索桥梁结构的颤振稳定性有所降低; 在构造边跨跨度非对称悬索桥时,弯扭频率比随着边跨跨度差增加而减小; 随着支承跨度差的不断增大,悬索桥梁结构的颤振临界风速不断减小,但减小幅度很小,影响不大,在边跨跨度差较小时几乎可以不考虑对悬索结构的颤振稳定性影响。

Abstract:

In order to study the flutter stability of long-span asymmetric suspension bridge under different asymmetric types, a suspension bridge with unequal height support and main span of 628 m was taken as the engineering background. The flutter stability of the suspension bridge was analyzed based on the full modal three-dimensional frequency domain flutter analysis method. The finite element analysis model of suspension bridge with unequal height support(height difference was 0-40 m)of main cable and asymmetric side span(side span difference was 0-40 m)was established by ANSYS, and the corresponding two-parameter search iterative APDL calculation program was compiled for three-dimensional flutter stability analysis. The results show that when the unequal height suspension bridge is constructed, with the increase of the bearing height difference, the low-order modal frequency changes little and the high-order modal range decreases gradually. The bending-torsion frequency ratio decreases with the increase of the support height difference. The larger the height difference, the faster the bending-torsion frequency ratio decreases. The critical wind speed of bridge flutter decreases with the increase of support height difference, which makes the flutter stability of long-span suspension bridge structure decrease due to the asymmetric structure caused by the unequal height difference of main cable. When constructing side span asymmetric suspension bridge, the bending-torsion frequency ratio decreases with the increase of side span difference. With the increase of the difference of supporting span, the flutter critical wind speed of suspension bridge beam structure decreases, but the difference is very small, almost no effect. When the difference of side span is small, the flutter stability of suspension cable structure can be almost ignored.

参考文献/References:

[1] 刘健新,李加武.中国西部地区桥梁风工程研究[J].建筑科学与工程学报,2005,22(4):32-39.
LIU Jian-xin,LI Jia-wu.Study of Wind Project of Bridge in Western Area of China[J].Journal of Architecture and Civil Engineering,2005,22(4):32-39.
[2]周孟波.悬索桥手册[M].北京:人民交通出版社,2003.
ZHOU Meng-bo.Suspension Bridge Handbook[M].Beijing:China Communications Press,2003.
[3]杨国俊.非对称悬索桥静力性能及动力特性分析[D].西安:长安大学,2016.
YANG Guo-jun.Analysis of Static Behavior and Dynamic Property for Asymmetry Suspension Bridge[D].Xi'an:Chang'an University,2016.
[4]杨国俊,杜永峰,唐光武,等.大跨度非对称悬索桥振动基频的参数敏感性分析[J].土木工程学报,2018,51(增1):72-79.
YANG Guo-jun,DU Yong-feng,TANG Guang-wu,et al.Sensitivity Analysis of Parameters for Vibration Frequency of Long-span Asymmetric Suspension Bridge[J].China Civil Engineering Journal,2018,51(S1):72-79.
[5]唐茂林,宋 晖,林 恰,等.矢跨比对悬索桥受力的影响分析[J].建筑科学与工程学报,2010,27(3):24-28.
TANG Mao-lin,SONG Hui,LIN Qia,et al.Influence Analysis of Rise-span Ratio on Force of Suspension Bridge[J].Journal of Architecture and Civil Engineering,2010,27(3):24-28.
[6]段 玮.大跨径非对称支撑悬索桥静风稳定性分析[D].西安:长安大学,2016.
DUAN Wei.Aerostatic Stability of Asymmetrical Long-span Suspension Bridge[D].Xi'an:Chang'an University,2016.
[7]周 继.大跨度悬索桥成桥状态颤振分析[D].成都:西南交通大学,2011.
ZHOU Ji.Flutter Analysis of Long-span Suspension Bridge During Completed Stage[D].Chengdu:Southwest Jiaotong University,2011.
[8]张新军,赵晨阳.大跨度悬索桥颤振的三维精细化分析[J].振动与冲击,2019,38(14):246-253.
ZHANG Xin-jun,ZHAO Chen-yang.3D Refined Flutter Analysis of Long-span Suspension Bridges[J].Journal of Vibration and Shock,2019,38(14):246-253.
[9]张 倩.桥梁主梁断面颤振导数的数值模拟研究[D].成都:西南交通大学,2008.
ZHANG Qian.Research on Flutter Derivatives of Bridge Girder Sections by Numerical Simulation[D].Chengdu:Southwest Jiaotong University,2008.
[10]祝志文,陈政清.数值模拟桥梁断面气动导数和颤振临界风速[J].中国公路学报,2004,17(3):41-45,50.
ZHU Zhi-wen,CHEN Zheng-qing.Numerical Simulations for Aerodynamic Derivatives and Critical Flutter Velocity of Bridge Deck[J].China Journal of Highway and Transport,2004,17(3):41-45,50.
[11]王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2004.
WANG Fu-jun.Computational Fluid Dynamics Analysis:Principle and Application of CFD Software[M].Beijing:Tsinghua University Press,2004.
[12]胡建华.大跨度自锚式悬索桥结构体系及静动力性能研究[D].长沙:湖南大学,2006.
HU Jian-hua.The Research on Structural System and Static-dynamic Mechanics Performance of Long-span Self-anchored Suspension Bridges[D].Changsha:Hunan University,2006.
[13]廖海黎,王 骑,李明水.大跨桥梁颤振分析理论研究进展[J].中国公路学报,2019,32(10):19-33.
LIAO Hai-li,WANG Qi,LI Ming-shui.Advance on Flutter Analytical Theory of Long Span Bridges[J].China Journal of Highway and Transport,2019,32(10):19-33.
[14]项海帆,葛耀君,朱乐东,等.现代桥梁抗风理论与实践[M].北京:人民交通出版社,2005.
XIANG Hai-fan,GE Yao-jun,ZHU Le-dong,et al.Modern Theory and Practice on Bridge Wind Resistance[M].Beijing:China Communications Press,2005.
[15]葛耀君.大跨度悬索桥抗风[M].北京:人民交通出版社,2011.
GE Yao-jun.Wind Resistance of Long Span Suspension Bridges[M].Beijing:China Communications Press,2011.
[16]SCANLAN R H.The Action of Flexible Bridges Under Wind,I:Flutter Theory[J].Journal of Sound and Vibration,1978,60(2):187-199.
[17]胡峰强,陈艾荣.全模态颤振分析的实用方法[J].公路交通科技,2007,24(2):77-79.
HU Feng-qiang,CHEN Ai-rong.Full-mode Flutter Analysis with Double Parameters and Its Realization in ANSYS[J].Journal of Highway and Transportation Research and Development,2007,24(2):77-79.
[18]胡晓伦.大跨度斜拉桥颤抖振响应及静风稳定性分析[D].上海:同济大学,2006.
HU Xiao-lun.Flutter,Buffeting and Aerostatic Stability Analysis for Long-span Cable-stayed Bridges[D].Shanghai:Tongji University,2006.
[19]华旭刚,陈政清.基于ANSYS的桥梁全模态颤振频域分析方法[J].中国公路学报,2007,20(5):41-47.
HUA Xu-gang,CHEN Zheng-qing.Full-mode Flutter Frequency Domain Analysis Method of Bridge Based on ANSYS[J].China Journal of Highway and Transport,2007,20(5):41-47.
[20]HUA X G,CHEN Z Q,NI Y Q,et al.Flutter Analysis of Long-span Bridges Using ANSYS[J].Wind and Structures,2007,10(1):61-82.
[21]严 琨,沈锐利,唐茂林.大跨度悬索桥主缆抗弯刚度模型试验[J].建筑科学与工程学报,2010,27(3):41-46.
YAN Kun,SHEN Rui-li,TANG Mao-lin.Model Experiment on Bending Stiffness of Main Cable of Long-span Suspension Bridge[J].Journal of Architecture and Civil Engineering,2010,27(3):41-46.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2022-05-14
基金项目:中央高校基本科研业务费专项资金项目(300102210108)
作者简介:郝建铭(1991-),男,陕西绥德人,讲师,工学博士,E-mail:jianminghao@chd.edu.cn。

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更新日期/Last Update: 2022-09-30