Characteristics and Mechanism of Longitudinal Displacement for Suspension Bridge under Vertical Loads

被引：0
|
作者：
Huang G. [1 ,2 ]
Hu J. [1 ,3 ]
Wan T. [4 ]
Hua X. [1 ]
Feng Z. [1 ]
Chen Z. [1 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] College of Civil Engineering, Hunan City University, Yiyang
[3] Hunan Communication & Water Conservancy Group Ltd., Changsha
[4] China Railway Major Bridge Reconnaissance & Design Institute Co. Ltd., Wuhan
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
central buckles; longitudinal displacement; suspension bridge; vertical loads;
D O I：
10.16339/j.cnki.hdxbzkb.2023.01.008
中图分类号：
学科分类号：
摘要：
In order to reveal the longitudinal deformation characteristics and mechanism of suspension bridges under vertical loads，the deformation characteristics of the cable under vertical loads were studied based on its deformation theory，and the analytical solutions of vertical and longitudinal displacement were obtained. On this basis，the longitudinal deformation characteristics and the longitudinal displacement of the stiffening girder for the traditional suspension bridge and the suspension bridge with central buckles are analyzed under vertical loads，the longitudinal restraint mechanism of the central buckles is subsequently revealed，and the simplified formulas to estimate the longitudinal displacement of the stiffening girder under vertical loads are deduced，respectively. Finally，the accuracy of the proposed displacement calculation formulas is verified by an example. The results show that the vertical and longitudinal displacement are coupled to each other due to the geometric nonlinear characteristics of the main cable. The main cable undergoes asynchronous longitudinal displacement，while the stiffening girder mainly moves longitudinally as a rigid body similar to the pendulum under the action of asymmetric vertical loads. The main cable，the stiffening girder，and the central buckles form a rigid domain" area in the middle of the span as the existence of the central buckle. As a result，the longitudinal displacement of the stiffening girder decreases. The proposed method agrees well with the finite element numerical solution under different vertical load cases. © 2023 Hunan University. All rights reserved."
引用
收藏
页码：78 / 89
页数：11
相关论文
共 29 条
  • [1] WAN T B, LI S L．, Longitudinal displacement characteristics and longitudinal supporting requirements for long-span railway suspension bridge［J］, Bridge Construction, 50, 4, pp. 29-35, (2020)
  • [2] ZHANG Y F．, Failure mechanism of expansion joints in a suspension bridge［J］, Journal of Bridge Engineering, 21, 10, (2016)
  • [3] GUO T, HUANG L Y．, Investigation and control of excessive cumulative girder movements of long-span steel suspension bridges［J］, Engineering Structures, 125, pp. 217-226, (2016)
  • [4] ZHANG Y F．, Utilization of structural health monitoring in long-span bridges：case studies［J］, Structural Control and Health Monitoring, 24, 10, (2017)
  • [5] GUO T, HUANG L Y, Damage mechanism of control springs in modular expansion joints of long-span bridges, Journal of Bridge Engineering, 23, 7, (2018)
  • [6] LIU Z X, HUANG L Y, Fatigue life evaluation on short suspenders of long-span suspension bridge with central clamps, Journal of Bridge Engineering, 22, 10, (2017)
  • [7] SHEN Y F．, Failure investigation and replacement implementation of short suspenders in a suspension bridge ［J］, Journal of Bridge Engineering, 22, 8, (2017)
  • [8] LIU Z X, Measurement and comparative study on movements of suspenders in long-span suspension bridges, Journal of Bridge Engineering, 24, 5, (2019)
  • [9] HUA X G，, WONG K Y, Assessment of bridge expansion joints using long-term displacement and temperature measurement, Journal of Performance of Constructed Facilities, 21, 2, pp. 143-151, (2007)
  • [10] ZHANG Y F, Displacement monitoring and analysis of expansion joints of long-span steel bridges with viscous dampers, Journal of Bridge Engineering, 20, 9, (2015)
123