紊流空间相关系数对大跨度三塔悬索桥抖振响应的影响

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (10) : 202-206.

论文

茅建校王浩陶天友徐梓栋李爱群

作者信息 +

Effects of the turbulent spatial correlation coefficient on buffeting responses of a triple-tower suspension bridge

Jianxiao Mao Hao Wang Tianyou Tao Zidong Xu Aiqun Li

Author information +

文章历史 +

摘要

鉴于紊流空间相关系数尚难以准确获取的现状，以泰州长江公路大桥为研究对象，采用谐波合成法模拟了该桥的三维脉动风场，并基于ANSYS平台进行了该桥非线性抖振响应时域分析。在研究过程中，以Davenport相干函数中的无量纲衰减因子λ为控制参数，重点分析了紊流空间相关系数对大跨度三塔悬索桥风致抖振响应的影响。研究结果表明，紊流空间相关系数对桥梁抖振响应影响较大，主梁跨中侧向与扭转位移响应随着衰减因子的增大而减小，竖向抖振位移响应随着衰减因子的增大而略有增加，且不同的衰减因子λ所造成的抖振响应计算值的差值可达50%以上。结论可供大跨度三塔悬索桥的风致抖振研究参考。

Abstract

Considering the situation of the difficulty in obtaining exactly spatial correlation coefficients, the Taizhou Yangtze River Highway Bridge was taken as an example. The three-dimensional fluctuating wind field of this bridge was simulated with harmonic synthetic method. And the nonlinear buffeting analysis on the bridge was conducted in time domain based on ANSYS. During the research period, dimensionless decay factors λ of Davenport correlation function was set as the control parameter and the analysis of the influence of spatial correlation coefficient of fluctuating wind on wind-induced buffeting response of long-span triple-tower suspension bridge was focused on. Results show that the spatial correlation coefficient of fluctuating wind has great influence on wind-induced buffeting response of the bridge. The lateral and torsional buffeting displacements at the mid-span decrease with the augment of the decay factor, while those of the vertical increase slightly when the decay factor turns larger. At the same time, the difference of buffeting responses caused by various decay factors could reach 50%. The results can provide references for wind-induced buffeting analysis of long-span triple-tower suspension bridges.

导出引用

茅建校王浩陶天友徐梓栋李爱群. 紊流空间相关系数对大跨度三塔悬索桥抖振响应的影响[J]. 振动与冲击, 2016, 35(10): 202-206

Jianxiao Mao Hao Wang Tianyou Tao Zidong Xu Aiqun Li . Effects of the turbulent spatial correlation coefficient on buffeting responses of a triple-tower suspension bridge[J]. Journal of Vibration and Shock, 2016, 35(10): 202-206

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