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."
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页码：78 / 89
页数：11
相关论文
共 29 条
  • [11] DENG Y, DING Y L, LI A Q．, Structural condition assessment of long-span suspension bridges using long-term monitoring data ［J］, Earthquake Engineering and Engineering Vibration, 9, 1, pp. 123-131, (2010)
  • [12] SONG X P, Field monitoring and response characteristics of longitudinal movements of expansion joints in long-span suspension bridges［J］．Measurement, 162, (2020)
  • [13] Wear evaluation on slide bearings in expansion joints based on cumulative displacement for long-span suspension bridge under monitored traffic flow［J］, Journal of Performance of Constructed Facilities, 34, 1, (2020)
  • [14] LI G L, HAN W S，, CHEN X, Longitudinal deformation of expansion joint of suspension bridge under wind and random traffic flow, Journal of Traffic and Transportation Engineering, 19, 5, pp. 21-32, (2019)
  • [15] ZHAO Y, HUANG P M，, LONG G X, Study on multiobjective control of viscous damper for suspension bridge based on measured traffic flow, Journal of Highway and Transportation Research and Development, 37, 3, pp. 70-79, (2020)
  • [16] ZHAO Y, HUANG P M，, LONG G X, Influence of fluid viscous damper on the dynamic response of suspension bridge under random traffic load［J］, Advances in Civil Engineering, 2020, (2020)
  • [17] HAN D Z，, GUO T，, HUANG L Y, A study on longitudinal displacements and damage control of expansion joints of long-span steel bridges under stochastic traffic loads［J］, Journal of Vibration and Shock, 38, 24, pp. 172-178, (2019)
  • [18] WANG L H, Effects of central buckle on end displacement of suspension bridges under vehicle excitation, Journal of Hunan University（Natural Sciences）, 46, 3, pp. 18-24, (2019)
  • [19] HU T F, HUA X G，, WEN Q, Influence of central buckles on modal characteristics of long-span suspension bridge, Journal of Highway and Transportation Research and Development, 32, 6, pp. 89-94, (2015)
  • [20] XU X, QIANG S Z，, HE S H．, Influence of central buckle on dynamic behavior and response of long-span suspension bridge under vehicle group excitation, China Journal of Highway and Transport, 21, 6, pp. 57-63, (2008)
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