负刚度-惯容阻尼器对隔震结构减震性能提升研究  

Anti-seismic Performance Enhancement of Isolated Structures with Negative Stiffness Inerter Dampers

作　　者：孟亮 马洪伟[2] MENG Liang;MA Hongwei(School of Architecture and Environmental Engineering,Wuxi Vocational College of City and Technology,Wuxi 214153,Jiangsu,China;School of Architectural Science and Engineering,Yangzhou University,Yangzhou 225127,Jiangsu,China)

机构地区：[1]无锡城市职业技术学院建筑与环境工程学院,江苏无锡214153 [2]扬州大学建筑科学与工程学院,江苏扬州225127

出　　处：《噪声与振动控制》2023年第6期275-281,共7页Noise and Vibration Control

基　　金：住房与城乡建设部基金资助项目(2014-K2-045)。

摘　　要：为进一步控制地震作用下基础隔震结构的地震响应,融合负刚度与惯容的减震优势,开展了负刚度-惯容阻尼器(Negative Stiffness Inerter Damper,NSID)对隔震结构减震性能提升研究。基于NSID-隔震结构耦合系统的状态空间方程,推导了Clough-Penzien谱输入下耦合系统随机地震响应;综合NSID设计成本和隔震结构减震性能提升需求,提出了基于成本控制的NSID参数优化方法;通过对比NSID、黏滞阻尼器(Viscous Damper,VD)、负刚度阻尼器(Negative Stiffness Damper,NSD)、惯容阻尼器(Viscous Inerter Damper,VID)对隔震结构在近场脉冲型地震作用下的控制效果,阐明了NSID对隔震结构减震控制的优势。研究结果表明:基础隔震复合NSID的减震措施可以有效降低隔震结构的隔震层位移,以及上部结构层间位移和绝对加速度响应;由于负刚度元件的存在,NSID对隔震结构位移的控制效果稍劣于VID,但优于NSD和VD;优化设计的NSID综合了惯容和负刚度对隔震结构层间位移和绝对加速度的控制优势,对隔震结构层间位移和绝对加速度的控制效果优于VD、VID和NSD。In order to control the seismic response of base-isolated structures(BIS)under earthquake excitations,the negative stiffness inerter damper(NSID)is proposed and studied to improve the anti-seismic performance of the BIS.Based on the state space equation of the NSID-BIS system,its random seismic response under the Clough-Penzien spectrum input is derived.Considering the cost of the NSID and the requirement of the anti-seismic performance enhancement of the BIS,the cost-based optimum design method for the NSID is proposed.The advantages of the NSID are demonstrated by comparing the control performance of the NSID with those of viscous damper(VD),negative stiffness damper(NSD),and viscous inerter damper(VID)for the BIS under near-field pulse-like ground motions.The results show that the BIS with the NSID can effectively reduce the maximum displacement of the isolation layer,the story drift of the upper structure and the absolute acceleration of the BIS.The control performance of the NSID for the displacement of BIS is slightly inferior to that of the VID due to the negative stiffness element,but superior to that of NSD and VD.Since the optimized NSID can integrate the advantages of inerter and negative stiffness,the NSID performs better than the VD,VID,and NSD in reducing story drift and absolute acceleration of the BIS.

关 键 词：振动与波 基础隔震 负刚度 惯容 优化设计 抗震性能提升 

分 类 号：TU352.1[建筑科学—结构工程]