悬索桥施工猫道非线性静风响应研究

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摘要 In order to make the study of aerostatic response of suspension bridge catwalk more realistic, the FEA(Finite Element Analysis)model of the catwalk of Lishuihe grand suspension bridge was established based on the FEA software ANSYS. Based on the section model wind tunnel test for the aerostatic tri-component force of the catwalk and considering the geometric nonlinearity and aerostatic nonlinearity of the catwalk of the bridge, a program that can accurately calculate the aerostatic instability of the catwalk of the suspension bridge was established by combining the incremental, as well as internal and external iteration. The 3D nonlinear static wind instability analysis for the catwalk of the bridge was then performed. The research result indicates that (1) the lift force can cause the tension of the load-bearing rope in the catwalk to gradually relax and the torsional stiffness of the small span catwalk to decrease; and (2) the aerostatic torsional instability is caused by the decreased torsional stiffness not being sufficient to resist the aerial torque effect.

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	作者相关文章
	汪洁
	李宇
	刘健新
	李加武
	雷俊卿

关键词 ： bridge engineering, aerostatic response, finite element nonlinear analysis, suspension bridge, catwalk

Abstract：In order to make the study of aerostatic response of suspension bridge catwalk more realistic, the FEA(Finite Element Analysis)model of the catwalk of Lishuihe grand suspension bridge was established based on the FEA software ANSYS. Based on the section model wind tunnel test for the aerostatic tri-component force of the catwalk and considering the geometric nonlinearity and aerostatic nonlinearity of the catwalk of the bridge, a program that can accurately calculate the aerostatic instability of the catwalk of the suspension bridge was established by combining the incremental, as well as internal and external iteration. The 3D nonlinear static wind instability analysis for the catwalk of the bridge was then performed. The research result indicates that (1) the lift force can cause the tension of the load-bearing rope in the catwalk to gradually relax and the torsional stiffness of the small span catwalk to decrease; and (2) the aerostatic torsional instability is caused by the decreased torsional stiffness not being sufficient to resist the aerial torque effect.

Key words： bridge engineering aerostatic response finite element nonlinear analysis suspension bridge catwalk

收稿日期: 2012-05-13

基金资助:Supported by the National Natural Science Foundation of China(No.91915001,No.51078038,and No.50878020);the Special Funds of the key Academic Discipline Project of Shaanxi Province (No.E01004);and the Natural Science Foundation for the Youth of Shaanxi Province (No.2011JQ7009)

通讯作者: WANG Jie, wangjieer@163.com E-mail: wangjieer@163.com

引用本文:

汪洁, 李宇, 刘健新, 李加武, 雷俊卿. 悬索桥施工猫道非线性静风响应研究[J]. Journal of Highway and Transportation Research and Development, 2013, 7(2): 40-45.
WANG Jie, LI Yu, LIU Jian-xin, LI Jia-wu, LEI Jun-qing. Nonlinear Aerostatic Response of Catwalk of Suspension Bridge. Journal of Highway and Transportation Research and Development, 2013, 7(2): 40-45.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2013/V7/I2/40

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