In-plane flexural vibration of a coupled system with box hanger and wind resistant cables in long-span steel arch bridges
The rigid hangers are important load-bearing structural elements of long-span steel arch bridges.The large vibrations of the hangers could generate more potential risks under the external wind excitations.The use of wind-resistant cables has become one of the most practical and effective measures to mitigate wind-induced vibrations.In this paper,a theoretical method of a coupled system consisted of a box hanger and a pair of wind-resistant cables is established.A pair of horizontal wind-resistant cables on a box hanger were simplified as four elastic supports.On this basis,the formula of equivalent stiffness is derived.Based on Bernoulli-Euler beam theory and compatibility requirements at the connection with wind-resistant cables,the transfer matrix function of the adjacent hanger segments is deduced.The fixed-fixed boundary conditions are adopted,then,the dynamic characteristics of the coupled system can be obtained easily.The effectiveness of the proposed solution method is verified by comparing the results with those obtained using finite element method.
box hanger wind-resistant cable equivalent spring flexural vibration dynamic characteristic
X.G.Hua K.Xu Z.H.Wang
College of Civil Engineering,Hunan University,Changsha,P.R.China Department of Civil Engineering and Communication,North China University of Water Resources and Elec
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1174-1183
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）