Volume 36 Issue 6
Sep.  2021
Turn off MathJax
Article Contents
Bingzhi Pei, Bolin Sun, Menzhe Zhang, Shengzhi Liu, Zhiwen Zhu. Effects on Aerodynamics of Long-Span Bridges with Different Vertical Clearance Under Bridges Decks[J]. STEEL CONSTRUCTION(Chinese & English), 2021, 36(6): 29-35. doi: 10.13206/j.gjgS20052502
Citation: Bingzhi Pei, Bolin Sun, Menzhe Zhang, Shengzhi Liu, Zhiwen Zhu. Effects on Aerodynamics of Long-Span Bridges with Different Vertical Clearance Under Bridges Decks[J]. STEEL CONSTRUCTION(Chinese & English), 2021, 36(6): 29-35. doi: 10.13206/j.gjgS20052502

Effects on Aerodynamics of Long-Span Bridges with Different Vertical Clearance Under Bridges Decks

doi: 10.13206/j.gjgS20052502
  • Received Date: 2020-12-20
    Available Online: 2021-09-16
  • In order to investigate aerodynamics of long-span bridges with different vertical clearance under bridges stiffening girder, the Reynolds-Averaged Navier-Stokes Equations and SST k-ω turbulent model were employed to solve the flow field around bridge girder of the Great Belt East Bridge main span with different vertical clearance in natural wind. The aerodynamic coefficients under various vertical clearance is presented and compared to wind tunnel test, and its flow mechanism relating to those changes is analyzed.
    The results find that the variation of vertical clearance presents mix effects on pressure distribution on girder surface, on lift and drag acting on girder, and on vortex shedding St number. When the vertical clearance decreases, the lift and drag coefficients will increase. Compared to the results from vertical clearance of 5B, the vertical clearance of 0.4B produces an increase of 87.8% for lift coefficient and an increase of 13.3% for drag coefficient, and the vortex shedding St number also indicates slightly increase. The monitored pressure distribution on girder surface indicates that when the vertical clearance is small, the peak pressure at the positive zone ahead of leading edge of the girder increases, and the peak negative pressure at the windward corner of the deck and bottom also increase, with significant increase observed at the deck corner. It is concluded that when the vertical clearance under the bridge is very small, the water surface will generate significant aerodynamic interference to the bridge girder, hence the increase wind loads acting on the bridge girder due to significantly small vertical clearance should be considered as to insure bridge safety against wind.
  • loading
  • [1]
    中华人民共和国住房和城乡建设部.内河通航标准:GB 50139—2014[S]. 北京: 中国计划出版社, 2015. (GB 50139—2014 The standards of inland waterway navigation[S]. Beijing: Planning press of China, 2015

    (in Chinese))
    [2]
    祝志文.基于二维RANS模型计算扁平箱梁漩涡脱落的可行性研究[J].中国公路学报,2015,28(6):24-33.

    Zhi-Wen Zhu, Feasibility Investigation on Prediction of Vortex Shedding of Flat Box Girders Based on 2D RANS Model[J], China Journal of Highway and Transport, 2015,28(6):24-33. (In Chinese)
    [3]
    Menter F R. Two-equation eddy-viscosity turbulence models for engineering applications[J]. AIAA Journal, 1994,32: 269-289.
    [4]
    祝志文,陈魏,袁涛.桥梁主梁CFD模拟之基准模型测压试验与气动特性分析[J].中国公路学报,2016,29(11):49-56.

    Zhi-Wen Zhu, Wei Chen, Tao Yuan, Pressure measurement and aerodynamics investigation on benchmark model for bridge girder CFD simulations[J], China Journal of Highway and Transport. 2016, 29(11):49-56. (In Chinese)
    [5]
    Larsen A. Aerodynamic aspects of the final design of the 1624 m suspension bridge across the Great Belt[J]. J. Wind Eng. Ind. Aerodyn., 1993, 48:261-285.
    [6]
    中华人民共和国交通运输部.公路桥梁抗风设计规范:JTG/T 3360-01—2018[S].北京:人民交通出版社股份有限公司,2019. JTG/T 3360-01-2018

    , Wind-resistant design specification for highway bridge[S].
    [7]
    祝志文,颜爽,王钦华,等.两自由度平板大幅振动的气动特性与稳定性的CFD研究[J].振动工程学报,2021, 34(2):271-282.
    [8]
    祝志文,李宏博.风洞模型棱角制作误差对扁平箱梁气动力和涡脱特性的影响[J].振动与冲击,2020,39(6):181-188.
    [9]
    祝志文,陈政清.数值模拟桥梁断面的颤振导数和颤振临界风速[J].中国公路学报,2004,15(4):41-50.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (225) PDF downloads(11) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return