大跨度钢桁梁悬索桥颤振稳定措施试验研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 182-189.

论文

大跨度钢桁梁悬索桥颤振稳定措施试验研究

李明 1,2,3 ，孙延国 1,2 3，李明水 1,2

作者信息 +

Tests for flutter stability measures of a long-span suspension bridge with steel truss girders

LI Ming 1,2,3 SUN Yan-guo 1,2,3 LI Ming-shui 1,2

Author information +

文章历史 +

摘要

为了研究不同颤振稳定措施对大跨度钢桁梁悬索桥颤振性能的影响，本文以赤水河大桥（大跨度钢桁梁悬索桥）为研究背景，通过节段模型风洞试验，分别研究了封闭中央开槽、设置上下中央稳定板三种稳定措施在单独设置以及联合使用时对主梁颤振临界风速的影响，并考察了颤振临界风速增长率随封槽板及稳定板封隔率和高度参数的变化规律，最后通过1:100全桥气弹模型试验验证了节段模型试验结果的可靠性。结果表明：封闭中央开槽能够在一定程度上改善钢桁梁的颤振稳定性能；单独设置上中央稳定板时，主梁颤振临界风速随着上稳定板高度的增加成非线性变化，并存在一个敏感区间；上稳定板的封隔率对其制振效果影响十分显著；多种稳定措施联合使用的制振效果明显优于单一稳定措施；单独设置和联合使用其他稳定措施时，上中央稳定板的制振效果比下中央稳定板好；封槽板以及上稳定板的封隔率均对颤振临界风速具有一定的影响。

Abstract

Here, in order to study the effect of different flutter stability measures on flutter performances of a long-span suspension bridge with steel truss girders, through section model’s wind tunnel tests, Chishui River Bridge being a long-span suspension bridge with steel truss girders in China was taken as an example to study the effects of three stability measures including central slot sealing plate, upper stabilizer and lower stabilizer in use alone or combined on flutter critical wind speeds of the main girder. The varying laws of growth ratio of flutter critical wind speed with variation of sealing rate of slot sealing plate and height parameter of stabilizers were also investigated. Finally, the reliability of the results obtained with section model’s wind tunnel tests was verified with a 1:100 scale full bridge aerodynamic elastic model test. The results showed that sealing central slot can improve flutter stability performance of steel truss girders at a certain level; when setting upper stabilizer solely, flutter critical wind speed of main girder nonlinearly varies with increase in height of upper stabilizer and there exists a sensitive interval; sealing rate of upper stabilizer significantly affects its flutter mitigation effect; flutter mitigation effect of multiple stability measures’ combined use is more significant than that of a single stability measure’s use; flutter mitigation effect of upper central stabilizer is better than that of lower central stabilizer with different uses of measures; sealing rate of central slot and that of upper stabilizer have a certain effect on flutter critical wind speed.

导出引用

李明 1,2,3,孙延国 1,2 3，李明水 1,2. 大跨度钢桁梁悬索桥颤振稳定措施试验研究[J]. 振动与冲击, 2018, 37(13): 182-189

LI Ming 1,2,3 SUN Yan-guo 1,2,3 LI Ming-shui 1,2. Tests for flutter stability measures of a long-span suspension bridge with steel truss girders[J]. Journal of Vibration and Shock, 2018, 37(13): 182-189

参考文献

[1] 于舰涵, 李明水, 廖海黎. 山区地形对桥位风场影响的数值模拟[J]. 西南交通大学学报, 2016, 51(4): 654-662.
YU Jian-han, LI Ming-shui, LIAO Hai-li. Numerical simulation of effect of mountainous topography on wind field at bridge site[J]. Journal of Southwest Jiaotong University, 2016, 51(4): 654-662.
[2] 庞加斌, 宋锦忠, 林志兴. 山区峡谷桥梁抗风设计风速的确定方法[J]. 中国公路学报, 2008, 21(05):39-44.
PANG Jia-bin, SONG Jin-zhong, LIN Zhi-xing. Determi- nation method for wind-resistant design wind speed of mountainous-valley bridge[J]. China Journal of Highway and Transport, 2008, 21(05):39-44.
[3] 王凯, 廖海黎, 李明水,等. 山区峡谷桥梁设计基准风速的确定方法[J]. 西南交通大学学报, 2013, 48(01):29-35.
WANG Kai, LIAO Hai-li, LI Ming-shui, et al. Determination method for basic design wind speed of mountainous-valley bridge[J]. Journal of Southwest Jiaotong University, 2013, 48(01):29-35.
[4] 赵林, 葛耀君, 郭增伟,等.大跨度缆索承重桥梁风振控制回顾与思考——主梁被动控制效果与主动控制策略[J]. 土木工程学报, 2015,48(12):91-100.
ZHAO Lin, GE Yao-jun, GUO Zheng-wei, et al. Reconsideration of wind-induced vibration mitigation of long-span cable supported bridges: effects of passive control and strategy of active control[J]. Journal of Civil Engineering, 2015,48(12):91-100.
[5] 陈政清, 欧阳克俭, 牛华伟,等. 中央稳定板提高桁架梁悬索桥颤振稳定性的气动机理[J]. 中国公路学报, 2009, 22(6):53-59.
CHEN Zheng-qing, OUYANG Ke-jian，NIU Hua-wei, et a1. Aerodynamic mechanism of improvement of flutter stability of truss-girder suspension bridge using central stabilizer[J]. China Journal of Highway and Transport, 2009, 22(6): 53-59.
[6] 欧阳克俭, 陈政清. 中央稳定板提高颤振稳定性能的细观作用机理[J]. 振动与冲击, 2016, 35(1):11-16.
OUYANG Ke-jian, CHEN Zheng-qing. Micro-mechanism of a central stabilizer for improving a bridge's flutter stability[J]. Journal of Vibration and Shock, 2016, 35(1):11-16.
[7] 白桦, 李宇, 李加武,等. 钢桁架悬索桥颤振稳定性能研究[J]. 振动与冲击, 2013, 32(04):90-95.
BAI Hua, LI Yu, LI Jia-wu, et al. Flutter stability of a steel truss girder suspension bridge[J]. Journal of Vibration and Shock, 2013, 32(04):90-95.
[8] WANG Kai, LIAO Hai-li, Li Ming-shui. Flutter suppression of long-span suspension bridge with truss girder[J]. Wind and Structures, 2016, 23(5): 405-420.
[9] 王凯, 廖海黎, 李明水. 基于风洞试验的大跨度钢桁梁悬索桥颤振性能研究[J]. 振动与冲击, 2015, 34(15): 175-180.
WANG Kai, LIAO Hai-li, Li Ming-shui. Flutter performance of a long-span suspension bridge with steel trusses based on wind tunnel testing[J]. Journal of Vibration and Shock, 2015, 34(15): 175-180.
[10] 李春光, 张志田, 陈政清,等. 桁架加劲梁悬索桥气动稳定措施试验研究[J]. 振动与冲击, 2008, 27(09):40-43.
LI Chun-guang, ZHANG Zhi-tian, CHEN Zheng-qing, et al. Experimental study on the aerodynamic stability measure of a suspension bridge with truss stiffening girder[J]. Journal of Vibration and Shock, 2008, 27(09):40-43.
[11] 刘庆宽, 盛永青, 马文勇,等. 小宽高比钢桁架悬索桥颤振稳定气动措施的试验研究[J]. 实验流体力学, 2012, 26(3):26-31.
LIU Qing-kuan, SHENG Yong-qing, MA Wen-yong, et al. Experimental study On aerodynamic measures for flutter stability of suspension bridge with small aspect ratio steel truss girder[J]. Journal of Experiments in Fluid Mechanics, 2012, 26(3):26-31.
[12] 中华人民共和国交通部. JTG/TD 60-01-2004 公路桥梁抗风设计规范[S]. 北京：人民交通出版社，2004.
Ministry of Transport of the People’s Republic of China. Wind resistant design specification for highway bridges[S]. Beijing: China Communication Press, 2004.
[13] 庞文保, 白光弼, 滕跃,等. P-Ⅲ型和极值Ⅰ型分布曲线在最大风速计算中的应用[J]. 气象科技, 2009, 37(02): 221-223.
PANG Wen-bao, BAI Guang-bi, TENG Yue, et al. Application of pearson-type III and the extreme-value type I method to calculation of maximal wind speed[J]. Meteoro- logical Science and Technology, 2009, 37(02): 221-223.
[14] 徐洪涛. 山区峡谷风特性参数及大跨度桁梁桥风致振动研究[D]. 成都:西南交通大学,2009.
XU Hong-tao. Research of wind characteristic parameters and wind-induced vibration of long span bridge with truss girder in mountainous area[D]. Chengdu: Southwest Jiaotong University,2009.
[15] 许福友, 陈艾荣, 张哲,等. 确定桥梁模型颤振临界风速的实用方法[J]. 振动与冲击, 2008, 27(12):97-102.
XU Fu-you, CHEN Ai-rong, ZHANG Zhe, et al. Practical technique for determining critical flutter wind speed of bridge model[J]. Journal of Vibration and Shock, 2008, 27(12): 97-102.
[16] 杨詠昕, 葛耀君, 项海帆. 大跨度桥梁中央开槽颤振控制效果和机理研究[J]. 土木工程学报, 2006, 39(7):74-80.
YANG Yong-xin, GE Yao-jun, XIANG Hai-fan. Flutter control effect and mechanism of central-slotting for long-span bridges[J]. Journal of Civil Engineering, 2006, 39(7):74-80.
[17] 杨詠昕, 葛耀君, 曹丰产. 大跨度悬索桥中央开槽箱梁断面的颤振性能[J]. 中国公路学报, 2007, 20(3):35-40.
YANG Yong-xin, GE Yao-jun, CAO Feng-chan. Flutter performance of central-slotted box girder section for long-span suspension bridges[J]. China Journal of Highway and Transport, 2007, 20(3):35-40.
[18] 杨詠昕, 葛耀君, 项海帆. 大跨度桥梁典型断面颤振机理[J]. 同济大学学报(自然科学版), 2006, 34(4):455-460.
YANG Yong-xin, GE Yao-jun, Flutter mechanism of representative sections for long-span bridges[J]. Journal of Tongji University (Natural Science), 2006, 34(4):455-460.