被动负刚度装置与线性滞回阻尼器组合对斜拉索多模态振动的阻尼效果  

Multimode Damping of a Stay Cable Attached with a Negative Stiffness Device and a Linaear Hysteretic Damper

作　　者：孙利民[1,2] 孙浚杰 狄方殿 邹易清 王萌[4] 陈林 SUN Limin;SUN Junjie;DI Fangdian;ZOU Yiqing;WANG Meng;CHEN Lin(Department of Bridge Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering(Tongji University),Shanghai 200092,China;Liuzhou OVM Machinery Co,Ltd,Liuzhou 545006,China;Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education(Beijing University of Technology),Beijing,100124,China)

机构地区：[1]同济大学桥梁工程系,上海200092 [2]土木工程防灾国家重点实验室(同济大学),上海200092 [3]柳州欧维姆机械股份有限公司,广西柳州545006 [4]城市与工程安全减灾教育部重点实验室(北京工业大学),北京100124

出　　处：《湖南大学学报（自然科学版）》2022年第5期9-16,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51978506);广西重点研发计划项目(2021AB22064)。

摘　　要：提出了结合负刚度装置提升线性滞回阻尼器对斜拉索多模态振动控制效果的方法.考虑被动负刚度装置与阻尼器在斜拉索上任意位置安装,采用斜拉索两点施控系统特征方程,讨论了安装位置、线性滞回阻尼器参数、负刚度系数等对斜拉索多模态阻尼的影响.结果表明,被动负刚度装置能有效提升线性滞回阻尼器对斜拉索的多阶模态阻尼比,其安装位置越靠近阻尼器,阻尼提升效果越明显.进一步,以苏通大桥某附有黏性剪切阻尼器的超长拉索为例进行了实际设计,讨论了被动负刚度的可行性,并与结合惯容器的阻尼器进行了对比,结果表明,被动负刚度装置对斜拉索-阻尼器系统多模态阻尼提升效果更好.Multimode damping of a stay cable attached with a negative stiffness device(NSD)and a linear hysteretic damper was studied.The frequency equation of a cable under transverse control forces at two locations is used for damping analyses by considering arbitrary NSD and damper locations.The effects of NSD and damper locations,damper parameters and negative stiffness values on multimode damping of stay cable are examined.It can be found that the multimode cable damping values can be significantly enhanced comparing with the single linear hysteretic damper.The closer the installation locations,the higher the damping level.Furthermore,multimode damping effect of the combinations is verified by using a long stay cable installed with a viscous shear damper on the Sutong Bridge,together with an inertial damper.The feasibility of the NSD is carefully discussed.The results show that the NSD is more helpful to enhance the multimode damping comparing with the inertial damper.

关 键 词：斜拉索振动 多模态阻尼 负刚度装置 线性滞回阻尼 惯容器 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]