Nonlinear flutter control of a long-span closed-box girder bridge with vertical stabilizers subjected to various turbulence flows
Nonlinear flutter control of a long-span closed-box girder bridge with vertical stabilizers subjected to various turbulence flows
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各种湍流作用下大跨度闭箱梁桥垂直稳定器的非线性颤振控制
DOI：
10.1016/j.tws.2019.106245
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发表时间：
2020-04
影响因子：
6.4
通讯作者：
Zhang Lihai
中科院分区：
文献类型：
--
作者：
Zhou Rui;Ge Yaojun;Liu Shiyi;Yang Yongxin;Du Yanliang;Zhang Lihai
通过采用14个自由度的大变形梁单元建立非线性三维有限元桥梁模型，研究了不同高度的向上垂直中央稳定器（UVCS）对大跨度吊桥颤振性能的影响。以润扬长江大桥为研究对象，首次建立了二维闭口箱梁的非线性气动力模型，并利用风洞试验结果对模型预测的颤振临界风速进行了验证。通过建立多变量非平稳随机风场，对该桥在不同垂向湍流强度（Iw）下的气动性能进行了一系列参数研究。数值结果表明，安装U型阻尼器不仅可以将一阶对称垂向振荡形态改变为二阶对称垂向振荡形态，而且可以将耦合振荡从稳定状态改变为颤振发散极限环的不稳定状态。在弯扭耦合振动中，U形截面主要控制竖向自由度的脉动，而U形截面高度的增加导致颤振临界风速增大，但扭转频率降低，特别是对于1.1m的U形截面，当U形截面高度超过2.84%时，颤振临界风速增大。
This study investigated the influence of different heights of upward vertical central stabilizers (UVCS) in flutter performance of long-span suspension bridges through developing nonlinear three-dimensional Finite Element (FE) bridge model using large-deformation beam elements with 14 degrees of freedom (DOFs). Using Runyang Yangtze River Bridge as a case study, the developed FE model firstly incorporates a nonlinear aerodynamic force model of the 2D closed-box girder with various UVCS, and the model predicted critical flutter wind velocities of the bridges were validated using wind tunnel testing results. A series of parametric studies were then carried out to study the aerodynamic performance of the bridge under different vertical intensities of incoming turbulence flow (Iw) by developing multi-variable non-stationary stochastic wind fields. The numerical results show that the installation of UVCS could not only modify from first-order to second-order symmetrical vertical oscillation configuration, but also change the coupled oscillation from the stable condition to the unstable limit cycle of flutter divergence. Furthermore, UVCS mainly governs the vertical DOF partication in the coupled bending-torsional oscillation of the bridge, while the increase of the height of UVCS results in a higher critical flutter wind velocity but a lower torsional frequency, particularly for the 1.1 m UVCS whenIwis over 2.84%.
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DOI：
10.1016/s0167-6105(97)00210-9
发表时间：
1997-07
影响因子：
4.8
作者：
T. Miyata;Hitoshi Yamada;K. Kazama
通讯作者：
T. Miyata;Hitoshi Yamada;K. Kazama
影响因子：
2.9
作者：
J. Lengiewicz;J. Korelc;S. Stupkiewicz
通讯作者：
J. Lengiewicz;J. Korelc;S. Stupkiewicz
DOI：
10.1061/(asce)em.1943-7889.0000709
发表时间：
2014-05
期刊：
Journal of Engineering Mechanics-asce
影响因子：
--
作者：
Teng Wu;A. Kareem
通讯作者：
Teng Wu;A. Kareem
影响因子：
6.4
作者：
Luongo, A.
通讯作者：
Luongo, A.
DOI：
--
发表时间：
1962-06
期刊：
Journal of the Structural Division
影响因子：
--
作者：
A. Davenport
通讯作者：
A. Davenport