斜拉索刚性杠杆质量减振装置研究  

Research of Rigid Lever Mass Damping Device for Stay Cables

作　　者：郭翠翠[1] 汪正兴[1] 蔡欣[1] 

机构地区：[1]中铁大桥局集团桥科院有限公司桥梁结构安全与健康湖北省重点实验室,湖北武汉430034

出　　处：《世界桥梁》2011年第2期48-51,56,共5页World Bridges

摘　　要：斜拉索易在外荷载作用下发生大幅振动,影响桥梁运营状态及使用寿命。为有效抑制斜拉索振动,采用杠杆放大原理,综合粘弹性减振,研制出一种新型的斜拉索减振装置——刚性杠杆质量减振器。通过研究其构造和减振原理,建立拉索-减振器数值理论模型,对减振效果进行数值计算及实桥试验。理论结果及实桥试验表明,该装置具有较高的减振效果,适用于大跨斜拉索减振。目前,该减振器已成功用于武汉天兴洲长江大桥和荆岳长江公路大桥斜拉索减振。The stay cables of cable-stayed bridge are liable to large amplitude vibration under the action of external load,which can bring about adverse influence on the operation condition and service life of the bridge.To effectively suppress the vibration of the cables,a new type of the damping device,the rigid lever mass damper,was developed by comprehensively utilizing the lever amplification principle and the viscoelastic damping.Through the research of the structural formation and damping principle of the device,the numerical models for the stay cable and damping device were established and the numerical calculation and tests of the damping effect of the device used on the practical bridges were made.The results of the theoretic calculation and the tests show that the device has sound damping effect and is applicable to the damping of the stay cables of long span cable-stayed bridges.Presently,the device has already been successfully used for the damping of the stay cables of Wuhan Tianxingzhou Changjiang River Bridge and Jingyue Changjiang River Highway Bridge.

关 键 词：斜拉桥 斜拉索 减振 装置 研究 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]