宁夏永宁黄河公路大桥斜拉索减振方案研究  

Study on Vibration Reduction Scheme on Stay Cables of the Yongning Yellow River Highway Bridge in Ningxia

作　　者：龙树娟 Long Shujuan(China Railway 16th Bureau Group Co. Ltd. , Beijing 100018, China)

机构地区：[1]中铁十六局集团有限公司,北京100018

出　　处：《铁道建筑技术》2017年第5期57-59,113,共4页Railway Construction Technology

基　　金：中国铁建股份公司2014年度科技研究开发计划项目(14-C17)

摘　　要：斜拉索是斜拉桥的主要受力构件,但极易受风致振动及内参数振动,影响整桥的使用寿命。本文以宁夏永宁黄河公路大桥为背景,提出采用拉索外置阻尼器、气动措施并用的综合减振方法来控制其振动,经分析采用具有半主动控制的永磁调节式磁流变阻尼器来增加附件阻尼,提高拉索振动对数衰减率,有效减小拉索在3 Hz以下的大幅振动,确保桥梁安全运营。The stay cable is the main component of the cable-stayed bridge, but it is easy to be affected by the wind-in- duced vibration and the internal parameter vibration, which affects the service life of the whole bridge. Based on the back- ground of the Yongning Yellow River highway bridge in Ningxia, the paper put forward a comprehensive method using vibra- tion damper, cable external aerodynamic measures to control the vibration. The permanent magnet with semi-active control adjustable magnetorheological damper was adopted to increase the damping of cable vibration accessories, so as to improve the rate of decay, effectively reduce the vibration of cables below 3 Hz, it could ensure safe operation of bridge.

关 键 词：斜拉索减振 附加阻尼 磁流变阻尼器 

分 类 号：U412.366[交通运输工程—道路与铁道工程]