钢桁架人行桥行人风环境及抗风性能研究

PDF(1828 KB)

振动与冲击 ›› 2019, Vol. 38 ›› Issue (16) : 274-280.

论文

钢桁架人行桥行人风环境及抗风性能研究

陈以荣，曹张1,2，刘志文1，张运权2，谢普仁1

作者信息 +

A study on pedestrian level wind environment and wind-resistance performances of a steel truss footbridge

CHEN Yiyong1, CAO Zhang1,2, LIU Zhiwen1, ZHANG Yunquan2，XIE Puren1

Author information +

文章历史 +

摘要

以某在建钢桁架人行桥为工程依托，首先采用计算流体动力学方法（Computational Fluid Dynamics，CFD）对非对称截面钢桁架人行桥主梁三分力系数、桥面行人风环境进行了数值模拟；然后采用风洞试验方法对非对称截面钢桁架主梁进行了涡振性能和颤振性能、三分力系数风洞试验研究。结果表明：桁架内文化墙对钢桁架下侧桥面行人风环境影响较大，适当增加文化墙与上、下弦杆之间间隙可有效改善钢桁架下侧桥面行人风环境；非对称钢桁架曲线人行桥风从左右两侧吹时三分力系数存在明显的差异；非对称钢桁架曲线人行桥存在明显涡激共振现象，采用调谐质量阻尼器（Tuned Mass Damper，TMD）可有效减小钢桁架人行桥涡振响应幅值。

Abstract

Based on a steel truss footbridge under construction, numerical simulations of aerodynamic coefficients and pedestrian level wind environment on bridge deck of the steel truss section were conducted firstly using computational fluid dynamics (CFD). Finally, the aerodynamic coefficients, vortex-induced vibrations, and flutter instability of the steel truss footbridge were investigated with wind tunnel tests. The research results show that the cultural wall inside the steel truss has great effects on the pedestrian level wind environment on the bottom bridge deck. Appropriate increase of the gaps between the cultural wall and the bottom and top chords of the truss can effectively improve the pedestrian level wind environment on the bottom bridge deck. The aerodynamic coefficients of the steel truss with asymmetry section under the wind blows from left side are obviously different from that of the bridge deck under the wind blows from the right side. There is obvious vortex-excited resonance of the steel truss footbridge with asymmetry section. The amplitudes of the vortex-excited resonance of the steel truss footbridge can be effectively reduced with tuned mass dampers (TMD).

导出引用

陈以荣,曹张1,2，刘志文1，张运权2，谢普仁1. 钢桁架人行桥行人风环境及抗风性能研究[J]. 振动与冲击, 2019, 38(16): 274-280

CHEN Yiyong1, CAO Zhang1,2, LIU Zhiwen1, ZHANG Yunquan2，XIE Puren1. A study on pedestrian level wind environment and wind-resistance performances of a steel truss footbridge[J]. Journal of Vibration and Shock, 2019, 38(16): 274-280

参考文献

[1] Živanović S., Pavic A., Reynolds P. Vibration serviceability of footbridges under human-induced excitation: a literature review[J]. Journal of Sound and Vibration, 2005, 279(1):1-74.
[2] 许福友, 谭岩斌 ,张哲,等. 某人行景观悬索桥抗风性能试验研究[J]. 振动与冲击, 2009, 28(7):143-144.
XU Fu-you, TAN Yan-Bing, Zhang Zhe, et al. Experimental study on wind resistance of a pedestrian suspension bridge [J]. Journal of Vibration and Shock, 2009, 28(7):143-144.
[3] 白桦, 李德锋, 李宇,等. 人行悬索桥抗风性能改善措施研究[J]. 公路, 2012(12):1-6.
BAI Hua, LI De-Feng, LI Yu, et al. Study on improvement measures of wind resistance of pedestrian suspension bridge [J]. Highway, 2012(12):1-6.
[4] Taylor J., Vezza M., Salisbury I. Numerical investigation of the effects of pedestrian barriers on aeroelastic stability of a proposed footbridge[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2008, 96(12):2418-2437.
[5] Pirner M. Aeroelastic characteristics of a stressed ribbon pedestrian bridge spanning 252m[J]. Journal of Wind Engineering & Industrial Aerodynamics, 1994, 53(3):301-314.
[6] Cammelli S., Bagnara A., Navarro J G. VIV-galloping interaction of the deck of a footbridge with solid parapets[J]. Procedia Engineering, 2017, 199:1290-1295.
[7] Ingólfsson E. T., Georgakis C. T., Jönsson J. Pedestrian-induced lateral vibrations of footbridges: A literature review[J]. Engineering Structures, 2012, 45(15):21-52.
[8] 陈政清, 华旭刚. 人行桥的振动与动力设计[M]. 北京: 人民交通出版社, 2009.
CHEN Zheng-Qing, HUA Xu-Gang. Vibration and dynamic design of footbridges[M]. Beijing: People’s Transportation Press, 2009.
[9] Stathopoulos T. Pedestrian level winds and outdoor human comfort[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2006, 94(11):769-780.
[10] Blocken B., Stathopoulos T., Beeck J. P A J V. Pedestrian-level wind conditions around buildings: Review of wind-tunnel and CFD techniques and their accuracy for wind comfort assessment [J]. Building and Environment, 2016, 100(5):50-81.
[11] Metje N., Sterling M., Baker C J. Pedestrian comfort using clothing values and body temperatures[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2008, 96(4):412-435.
[12] 孙睿珩. 建筑室外风环境评估方法研究[J]. 长春工程学院学报(自然科学版), 2015, 16(2):74-76.
SUN Rui-Heng. Study on outdoor wind environment assessment method of building[J]. Journal of Changchun Institute of Technology (Nature Science Edition), 2015, 16(02):74-76.
[13] 陈政清. 桥梁风工程[M]. 北京: 人民交通出版社, 2005, 56.
CHEN Zheng-Qing, Bridge wind engineering[M]. Beijing: People’s Transportation Press, 2005.
[14] 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.
JTG/T D60-01-2004. Wind-resistent design specification for highway bridges[S]. Beijing: People’s Transportation Press, 2004.