Design approaches of mitigating cable vibration using MR dampers on the cable-stayed bridges

摘要：

Large amplitude cable vibrations have been observed in numerous of cable-stayed bridges worldwide and vibration mitigation has become one of the critical issues in this type of bridges.Mitigating cable vibration using magneto-rheological(MR)dampers on stay cables is a new technique with the good prospects.It is the key issue to investigate the respective design method for estimating optimal voltages input to MR dampers.In this paper,a series of tests are conducted,and a nonlinear biviscous MR damper model is developed and the empirical formula of equivalent viscous factors for MR damper is derived.Taking account into cable sag,bending stiffness and inclining angle,the revised Pacheco’s design curve and the optimal design method of mitigating cable vibration by MR dampers is proposed.The field test results show that the method is feasible.

关键词： Stay cable vibration Magneto-rheological(MR)dampers mitigating vibration optimal voltages

作者: X. Y. Wang Z. Q. Chen Y. Q. Ni J. M. Ko

作者单位: Wind Engineer Research Centre,Hunan University,Changsha,Hunan 410082,P.R.China Department of Civil and Structural Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）