调谐负刚度-惯质阻尼器对隔震结构减震性能的提升  

Performance improvement of base-isolated structures by the tuned negative stiffness-inertial mass damper

作　　者：郜辉 邢晨曦 王浩[1] 高伟杰 梁瑞军 Gao Hui;Xing Chenxi;Wang Hao;Gao Weijie;Liang Ruijun(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;School of Law,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189 [2]东南大学法学院,南京211189

出　　处：《东南大学学报（自然科学版）》2023年第4期592-599,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52208468);江苏省基础研究计划资助项目(BK20220851).

摘　　要：为控制基础隔震结构的隔震层位移并进一步提升其减震性能,融合负刚度与调谐黏滞质量阻尼器的减震优势,开展了调谐负刚度惯质阻尼器(TNSIMD)对隔震结构的减震性能提升与优化设计研究.基于隔震结构简化分析模型,推导了隔震结构-TNSIMD耦合系统的阻尼增效方程和能量平衡方程,研究了TNSIMD参数对隔震层位移、隔震结构等效阻尼比与TNSIMD耗能比的影响.在此基础上,提出了考虑TNSIMD控制性能和设计成本的协同优化方法,并以五层框架结构为数值案例,评估了TNSIMD对隔震结构在近场脉冲型地震作用下的控制效果.研究结果表明,TNSIMD可以发挥其自身的调谐作用和负刚度优势,实现其耗能提升以及对隔震结构的减震增效;与黏滞阻尼器、调谐黏滞质量阻尼器和负刚度惯质阻尼器相比,TNSIMD对近场脉冲型地震作用下隔震结构的位移和绝对加速度控制效果更优,并能耗散更多的地震能量.To control the displacement of the base isolation layer and further enhance the seismic performance of the base-isolated structure(BIS),integrating the advantages of the negative stiffness and tuned viscous mass damper for earthquake protection,the performance enhancement and optimum design of BIS by the tuned negative stiffness-inertial mass damper(TNSIMD)were investigated.Based on the simplified analysis model of BIS,the damping enhancement equation and energy balance equation of the BIS-TNSIMD system were derived.The effects of the parameters of the TNSIMD on the displacement of the base isolation layer,equivalent damping ratio of the BIS,and energy dissipation ratio of the TNSIMD were evaluated.On this basis,a collaborative optimization design method was developed to balance the control performance and design cost.The control performance of the TNSIMD was evaluated when the BIS was subjected to near-field pulse earthquakes through a five-story frame structure.The results show that the TNSIMD takes advantages of its tuned effect and negative stiffness to achieve the energy dissipation improvement and control performance enhancement of the BIS.When the BIS is subjected to the near-field pulse earthquakes,the TNSIMD is more effective than the viscous damper,tuned viscous mass damper,and negative stiffness-inertial mass damper in reducing the displacement and absolute acceleration of BIS,and can dissipate more seismic energy.

关 键 词：基础隔震 负刚度 惯质阻尼器 性能成本协同优化 

分 类 号：TU352.12[建筑科学—结构工程]