大跨度Π型钢-混叠合梁斜拉桥存在常遇风速下的涡激振动（vortex-induced vibration ,VIV）。为了抑制涡激振动，采用1:50节段模型风洞试验，研究了不同气动措施对主梁涡振制振的作用，包括下稳定板、导流板、裙板、整流罩等措施。试验结果表明，只有整流罩与下中央稳定板的组合气动措施能在不同风攻角和0.66%的阻尼条件下，将主梁的竖弯与扭转涡振振幅同时降低75%以上。在此基础上，通过提高整流罩竖板高度优化了该制振措施，继而开展的1:20节段模型风洞试验的结果表明，优化后的措施能够完全消除Π型叠合梁在不同风攻角和0.5%小阻尼比下的涡激振动。最后，数值计算的结果表明，优化后的整流罩组合措施能够同时降低主梁上、下表面旋涡脱落尺寸，并显著减小主梁受到的周期性涡激力，从而达到抑制主梁涡振的效果。研究成果可为Π型钢-混叠合梁斜拉桥的涡振制振措施设计提供参考。
关键词：Π型钢-混叠合梁；涡激振动；整流罩组合措施；计算流体动力学（CFD）；大比例尺节段模型
Abstract
Vortex-induced vibration （VIV） of a long span cable-stayed bridge with Π-shaped steel-concrete composite girder often occurs at frequent wind speeds. In order to suppress VIV of the girder, the effects of different measures on VIV were studied by using 1:50 scale section model wind tunnel test, including installing lower stabilizer, baffle, apron fairing and the combination of fairing and lower central stabilizer. The tests show that only the combination of the fairing and lower central stabilizer can reduce the vertical and torsional VIV amplitude of the girder by more than 75% under different wind attack angles and 0.66% damping conditions. On this basis, the height of the fairing vertical plate is increased, and the aerodynamic shape of the combination of the fairing and lower central stabilizer is further improved. The effectiveness of the measure is verified by 1:20 large-scale section model wind tunnel test. Finally, the VIV suppression mechanism of the aerodynamic measure is studied by using computational fluid dynamics. The calculation results show that the combination of the fairing and lower central stabilizer can simultaneously reduce the vortex size on the upper and lower surfaces of the girder and effectively reduce the unsteady aerodynamic force on the girder, thereby suppressing the VIV of the girder. The research results can provide reference for the VIV performance design of the Π-shaped steel-concrete composite girder of long span cable-stayed bridge.
Key Words：Π-shaped steel-concrete composite girder；vortex-induced vibration；fairing combination measure； computational fluid dynamics（CFD）；large scale section mode
关键词
&Pi /
型钢-混叠合梁；涡激振动；整流罩组合措施；计算流体动力学（CFD）；大比例尺节段模型
{{custom_keyword}} /
Key words
&Pi /
-shaped steel-concrete composite girder；vortex-induced vibration；fairing combination measure； computational fluid dynamics（CFD）；large scale section mode
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 李亚东. 桥梁工程概论[M]. 成都: 西南交通大学出版社，2014.
LI Ya-dong. Introduction to bridge engineering [M]. Chengdu: Southwest Jiaotong University Press, 2014.
[2] 高翔，周尚猛，陈开利. 混合梁斜拉桥钢混结合段试验研究技术新进展[J]. 钢结构，2015，30(06)：1-4.
GAO Xiang, ZHOU Shang-meng, CHEN Kai-li. New development of the experimental research on steel-concrete composite joint of composite beam cable-stayed bridge[J]. Steel Construction, 2015, 30(06): 1-4.
[3] 董佳慧，周强，马汝为，等. 边箱钢-混叠合梁颤振性能及气动措施研究[J]. 振动与冲击，2020，39(03)：155-160.
DONG Jia-hui, ZHOU Qiang, MA Ru-wei, et al. Flutter performance and aerodynamic measures of a suspension bridge with side box steel-concrete composite girder[J]. Journal of Vibration and Shock, 2020, 39(03): 155-160.
[4] 李欢，何旭辉，王汉封，等. π型断面超高斜拉桥涡振减振措施风洞试验研究[J]. 振动与冲击，2018，37(07)：62-68.
LI Huan, HE Xu-hui, WANG Han-feng, et al. Wind tunnel tests for vortex-induced vibration control measures of a super high cable-stayed bridge with π-cross section[J]. Journal of Vibration and Shock, 2018, 37(07): 62-68.
[5] KUBO Y, KIMURA K, SADASHIMA K, et al. Aerodynamic performance of improved shallow Π shape bridge deck[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2002, 90(12/13/14/15): 2113-2125.
[6] KOGA T. Improvement of aeroelastic instability of shallow Π Section[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2001, 89(14): 1445-1457.
[7] Irwin P A. Bluff body aerodynamics in wind engineering[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2008, 96(6): 701-712.
[8] 董锐，杨詠昕，葛耀君. 斜拉桥Π型开口断面主梁气动选型风洞试验[J]. 哈尔滨工业大学学报，2012，44(10)：109-114.
DONG Rui, YANG Yong-xin, GE Yao-jun. Wind tunnel test for aerodynamic selection of Π shape deck of cable-stayed bridge[J]. Journal of Harbin Institute of Technology, 2012, 44(10): 109-114.
[9] 钱国伟，曹丰产，葛耀君. Ⅱ型叠合梁斜拉桥涡振性能及气动控制措施研究[J]. 振动与冲击，2015，34(02)：176-181.
QIAN Guo-wei, CAO Feng-chan, GE Yao-jun. Vortex-induced vibration performance of a cable-stayed bridge with Π shaped composite deck and its aerodynamic control measures[J]. Journal of Vibration and Shock, 2015, 34(02): 176-181.
[10] 张志田，卿前志，肖玮，等. 开口截面斜拉桥涡激共振风洞试验及减振措施研究[J]. 湖南大学学报(自然科学版)，2011，38(07)：1-5.
ZHANG Zhi-tian, QING Qian-zhi, XIAO Wei, et al. Vortex-induced vibration and control method for a cable-stayed bridge with open cross section[J]. Journal of Hunan University: Natural Sciences, 2011, 38(07): 1-5.
[11] 杨光辉，屈东洋，牛晋涛，等. π型截面涡激振动风洞试验及气动抑制措施研究[J]. 石家庄铁道大学学报(自然科学版)，2015，28(01)：34-39.
YANG Guang-hui, QU Dong-yang, NIU Jin-tao, et al. Researches on Π-section vortex-induced vibration wind tunnel testing and aerodynamic suppression measures[J]. Journal of Shijiazhuang Tiedao University: Natural Science, 2015, 28(01): 34-39.
[12] 李锐. 斜拉桥Ⅱ型断面主梁涡振性能与气动措施研究[D]. 长安大学，2019.
LI Rui. Study on aerodynamic measures and vortex-induced vibration performance of cable-stayed bridge with Π secition[D]. Chang’an University, 2019.
[13] 张天翼，孙延国，李明水，等. 宽幅双箱叠合梁涡振性能及抑振措施试验研究[J]. 中国公路学报，2019，32(10)：107-114+168.
ZHANG Tian-yi, SUN Yan-guo, LI Ming-shui, et al. Experimental study on vortex-induced vibration performance and aerodynamic countermeasures for a wide-width double-box composite beam[J]. China Journal of Highways and Transport, 2019, 32(10): 107-114+168.
[14] 陈政清. 桥梁风工程[M]. 北京：人民交通出版社，2005．
[15] JTG/T 3360-01-2018. 公路桥梁抗风设计规范[S]. 北京：人民交通出版社，2018.
[16] 黄林，董佳慧，王骑，等. 矩形钢箱梁铁路斜拉桥涡振性能及气动控制措施研究[J]. 振动与冲击，2021，40(06)：23-32+85.
HUANG Lin, DONG Jia-hui, WANG Qi, et al. Vortex-induced vibration performance of cable-stayed railway bridge with rectangular steel box girder and aerodynamic countermeasure research[J]. Journal of Vibration and Shock, 2021, 40(06): 23-32+85.
[17] Zhang Tian-yi, Sun Yan-guo, Li Ming-shui, et al. Experimental and numerical studies on the vortex-induced vibration of two-box edge girder for cable-stayed bridges[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2020, 206: 104336.
[18] 战庆亮，周志勇，葛耀君. 开口叠合梁断面气动性能的试验研究[J]. 桥梁建设，2017，47(01)：17-22.
ZHAN Qing-liang, ZHOU Zhi-yong, GE Yao-jun. Experimental study of aerodynamic performance of open cross section of composite girders[J]. Bridge Construction, 2017, 47(01): 17-22.
[19] Gunter Schewe, Allan Larsen. Reynolds number effects in the flow around a bluff bridge deck cross section[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1998, 74-76:838．
[20] 李加武，张宏杰，韩万水. 斜拉桥风致响应的雷诺数效应[J]. 中国公路学报，2009，22(02)：42-47.
LI Jia-wu, ZHANG Hong-jie, HAN Wan-shui. Wind-induced response of cable stayed bridge with consideration of Reynolds number effect[J]. China Journal of Highway and Transport, 2009, 22(2): 42-47.
[21] 任若松，梁新华，刘小兵，等. 准流线型桥梁断面气动力特性的雷诺数效应研究[J]. 工程力学，2020，37(S1)：139-144+167.
REN Ruo-song, LIANG Xin-hua, LIU Xiao-bin, et al. Study on Reynolds number effect of aerodynamic characteristics of quasi-streamlined girder section[J]. Engineering Mechanics, 2020, 37(S1): 139-144+167.
[22] 鲜荣，廖海黎. 不同尺度扁平箱梁节段模型涡激振动风洞试验[J]. 桥梁建设，2010, (2)：9-13．
XIAN Rong, LIAO Hai-li. Wind tunnel test for vortex-induced vibration of different geometry scale sectional models of flat box girder[J]. Bridge Construction, 2010, (2): 9-13．
[23] 熊龙，孙延国，廖海黎. 钢箱梁在高低雷诺数下的涡振特性研究[J]. 桥梁建设，2016，46(5)：65-70．
XIONG Long, SUN Yan-guo, LIAO Hai-li. Study of vortex-induced vibration characteristics of steel box girder at high and low reynolds numbers[J]. Bridge Construction, 2016, 46 (5): 65-70．
[24] Menter F R. Two-equation eddy-viscosity models for engineering applications[J]. AIAA journal, 1994, 8(32): 1598-1606.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(2683 KB)
