Aerodynamic Optimization of Flutter Stability for a Long-span Streamlined Box Girder Suspension Bridge

被引：0
|
作者：
Liu Z. [1 ]
Xie P. [1 ]
Chen Z. [1 ]
Xu G. [2 ]
Xu J. [2 ]
机构：
[1] Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha
[2] China Highway Planning and Design Institute Consultants Inc, Beijing
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2019年 / 46卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Aerodynamic optimization; Flutter stability; Long-span suspension bridges; Numerical simulation; Wind tunnel tests;
D O I：
10.16339/j.cnki.hdxbzkb.2019.03.001
中图分类号：
学科分类号：
摘要：
Taking a suspension bridge with a streamlined girder of 1 660 m span as engineering background and using the methods of wind tunnel test and numerical simulation of CFD, this paper studies three main factors affecting the flutter stability of long-span suspension bridges, namely the main cable space form, aerodynamic shape of the girder section and height of central stabilizer, and then the mechanism of aerodynamic countermeasures is discussed. The results show that the influence of main cable layout on the flutter critical wind speed of bridge structures is mainly caused by the change of the torsional frequency of bridge structure according to the layout of main cables, which affects the critical wind speed of bridge structures. Appropriately increasing the ratio of width to height of the main girder section can effectively improve the flutter critical wind speed of bridge structures. Setting an appropriate height of central stabilizer can effectively improve the flutter critical wind speed of streamlined girder section with horizontal separation plates. The major effect of vortices generated near the central stabilizer is to generate the vertical aerodynamic force of streamlined main beam, leading to the increase of vertical movement degree of the main girder section and the suppression of torsional movement degree of the main girder section. Thus, the flutter stability of the streamlined girder section is improved. © 2019, Editorial Department of Journal of Hunan University. All right reserved.
引用
收藏
页码：1 / 9
页数：8
相关论文
共 17 条
  • [1] Miguel A.A., Flutter stability of very long suspension bridges, Journal of Bridge Engineering, 3, 3, pp. 132-139, (1998)
  • [2] Michael S.A., Jens J., Anders B., Et al., Aerodynamic stability of long span suspension bridges with low torsional natural frequencies, Engineering Structures, 120, pp. 82-91, (2016)
  • [3] Li C.J., Li Y.L., Tang M.L., Et al., Improvement of flutter stability of super long span suspension bridge with CFRP cable by crossed hangers, China Civil Engineering Journal, 50, 3, pp. 83-90, (2017)
  • [4] Wang Q., Liao H.L., Li M.S., Et al., Influence of aerodynamic configuration of a streamline box girder on bridge flutter and vortex-induced vibration, Journal of Modern Transportation, 19, 4, pp. 261-267, (2011)
  • [5] Larsen A., Wall A., Shaping of bridge box girders to avoid vortex shedding response, Journal of Wind Engineering and Industrial Aerodynamics, 104-106, pp. 159-165, (2012)
  • [6] Liu Z.W., Hong H., Liang L.N., Et al., Experimental investigation of the wind- resistant performance of Jiangshun Bridge in Guangdong, Journal of Hunan University(Natural Sciences), 42, 3, pp. 112-119, (2015)
  • [7] Liu Z.W., Gong H.X., Chen Z.Q., Experimental study on spanwise correlation of vortex-excited forces of a streamlined box girder, Journal of Hunan University(Natural Sciences), 44, 5, pp. 80-87, (2017)
  • [8] Yoshinobu K., Kenji S., Eiki Y., Et al., Improvement of aeroelastic instability of shallow π section, Journal of Wind Engineering and Industrial Aerodymics, 89, pp. 1445-1457, (2001)
  • [9] Xu H.T., He Y., Zou J.J., Et al., Study of wins tunnel test of aerodynamic optimization measures for flutter stability of super long-span bridge with truss girder, Journal of Highway and Transportation Research and Development, 2, pp. 48-53, (2010)
  • [10] Zhang H.J., Zhu L.D., Control effect and mechanism of cantilever horizontal splitting plates on flutter performance of a box deck, Journal of TongJi University(Natural Science), 39, 11, (2011)
12