基于杠杆质量阻尼器的斜拉索振动控制研究  

Research on Vibration Control of Stay Cables Based on Lever Mass Dampers

作　　者：蔡雄庭 金朝 刘鹏飞 CAI Xiong-ting;JIN Zhao;LIU Peng-fei(State Key Laboratory for Health and Safety of Bridge Structures,Wuhan 430034,China;China Railway Bridge Science Research Institute,Ltd.,Wuhan 430034,China;China Railway Britech Co.,Ltd.,Wuhan 430034,China)

机构地区：[1]桥梁结构健康与安全国家重点实验室,湖北武汉430034 [2]中铁大桥科学研究院有限公司,湖北武汉430034 [3]中铁桥研科技有限公司,湖北武汉430034

出　　处：《世界桥梁》2023年第S01期131-137,共7页World Bridges

摘　　要：为研究杠杆质量阻尼器参数变化对斜拉索减振性能的影响,以某主跨816 m的斜拉桥为背景,采用杠杆质量阻尼器对斜拉索进行振动控制,分析阻尼器插板面积及阻尼器附加惯性质量对斜拉索对数衰减率的影响规律,与粘性剪切型阻尼器的振动控制效果进行比较,并通过实桥测试验证杠杆质量阻尼器对斜拉索的减振效果。结果表明:杠杆质量阻尼器相较于传统的粘性剪切型阻尼器,可以通过杠杆放大作用以较小的插板面积实现相同的减振效果;增加阻尼器附加惯性质量可以提升杠杆质量阻尼器的减振效果,且较小的阻尼器附加惯性质量即可对斜拉索高阶模态对数衰减率有明显的提升效果;实桥安装杠杆质量阻尼器后,斜拉索总体振动加速度幅值减振率达94.4%,对数衰减率显著提升,满足斜拉索减振需求。This study focuses on the influence of parameter variation of lever mass dampers on the vibration suppression effect of stay cables.An existing cable-stayed bridge with a main span of 816 m,which is equipped with lever mass dampers to control the vibration of stay cables,is used as a case.The vibration control effect of lever mass dampers is compared with that of the viscous shear dampers.The influence of plug plate area and additional inertial mass of dampers on the logarithmic decrement of stay cables is analyzed.The vibration suppression effect of lever mass dampers for stay cables was verified on a real bridge.It is shown that compared with the conventional viscous shear dampers,the lever mass dampers can be fitted with smaller plug plates to achieve same vibration suppression effect,due to the amplification effect of the levers.Increasing additional inertial mass can improve the vibration suppression effect of lever mass dampers,and even a smaller additional inertial mass of dampers can result in remarkable improvement of logarithmic decrement of higher-mode vibrations of stay cables.In the case bridge,when equipped with lever mass dampers,the global reduction rate of vibration acceleration amplitude reaches 94.4%and the logarithmic decrement is notably improved,meeting the required vibration suppression level of stay cables.

关 键 词：斜拉桥 斜拉索 杠杆质量阻尼器 插板面积 阻尼器附加惯性质量 实桥测试 振动控制 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]