负刚度摩擦阻尼装置减震原理分析及振动台试验研究  

Analysis of seismic reduction principle and shaking table test of negative stiffness friction damping device

作　　者：孙天威 彭凌云[1] 李小军 SUN Tianwei;PENG Lingyun;LI Xiaojun(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]清华大学土木工程系,北京100084 [3]中国地震局地球物理研究所,北京100081

出　　处：《建筑结构学报》2023年第11期92-101,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(52178098,51421005)。

摘　　要：为研究负刚度摩擦阻尼减震结构的地震响应,对负刚度摩擦阻尼装置产生的负刚度四边形滞回模型进行了减震理论分析,并以某四层钢框架为研究对象,分别在其一层和二层布置负刚度摩擦阻尼装置,研究在不同地震动工况下结构的地震响应。结果表明:负刚度摩擦阻尼装置产生的负刚度四边形滞回模型可以在控制结构位移响应的同时降低结构刚度,从而降低了减震结构的自振频率,延长结构的自振周期,获得了预期的负刚度阻尼减震效果;振动台试验证明了负刚度摩擦阻尼装置可实现结构的位移与加速度响应双重控制,且安装在结构变形较大位置会获得更好的振动控制效果。To assess the seismic performance of structures with negative stiffness friction damping device,a negative stiffness quadrilateral hysteretic model generated by negative stiffness friction damping device was analyzed.Taking a four-floor steel structure frame as a case study,negative stiffness friction damping devices were arranged on the first and second floors of the steel structure frame,and the seismic response of the structure under different ground motions was analyzed.The results show that the negative stiffness quadrilateral hysteretic model generated by the negative stiffness friction damping device can control the displacement response and reduce the structural stiffness.Thus,the natural frequency is reduced and the natural period is extended,as expected.The shaking table tests show that the negative stiffness friction damping device can control the acceleration and displacement responses of the structure.In addition,better seismic reduction effect will be obtained when the device is arranged at the large structural deformation position.

关 键 词：阻尼装置 负刚度 摩擦阻尼 振动台试验 减震效果 

分 类 号：TU352[建筑科学—结构工程]