Wind-rain-induced Vibration Model and Characteristic Analysis of Catenary Type Stay Cable

被引：0
|
作者：
Yang X.-W. [1 ]
Li M.-S. [1 ]
Li T. [2 ]
机构：
[1] Research Center for Wind Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan
[2] School of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou, 545006, Guangxi
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2019年 / 32卷 / 10期
关键词：
Bridge engineering; Catenary; Continuous cable; Rain-wind-induced vibration; Sag; Stay cable; Theoretical derivation;
D O I：
10.19721/j.cnki.1001-7372.2019.10.023
中图分类号：
学科分类号：
摘要：
As the span of a cable-stayed bridge increases, the lengths of the cable also increase, and the errors associated with replacing the cable shapes with parabolic shapes also increase. In this study, the Coulomb and viscous linear damping forces between the cable and the rivulet surface were taken into account, and a theoretical model of wind-rain-induced vibration of the cable was established based on the static linearity of the catenary line considering the in-plane and out-of-plane coupling vibrations; further, the differential equation of cable vibration for each mode was derived in the form of coordinates. Taking different cable parameters as examples, the coupled differential equations of the cable and rivulets were numerically solved, and the calculated results were compared with those form the parabolic cable wind-rain-induced vibration theory model. The results show that the calculation results of cables using catenary and parabolic lines vary in amplitude, cable vibration modal, vibration frequency and space vibration form, phase difference between the cable and rivulet, and vibration frequency of rivulet. The influence coefficient of the sag has great influence on the low order mode of the cable, and the effect coefficient of parabolic sag is approximately half that of the catenary. The natural vibration frequency of each mode of the cable obtained from the theoretical model of the rain-wind-induced vibration established by the catenary lines is higher than that obtained from the parabolic model. © 2019, Editorial Department of China Journal of Highway and Transport. All right reserved.
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页码：237 / 246
页数：9
相关论文
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