康迎杰, 彭凌云, 刘庆宽, 马晓楠, 白武越. 近断层脉冲地震作用下调谐型阻尼器对隔震结构的减震控制[J]. 工程力学. DOI: 10.6052/j.issn.1000-4750.2023.01.0034
引用本文: 康迎杰, 彭凌云, 刘庆宽, 马晓楠, 白武越. 近断层脉冲地震作用下调谐型阻尼器对隔震结构的减震控制[J]. 工程力学. DOI: 10.6052/j.issn.1000-4750.2023.01.0034
KANG Ying-jie, PENG Ling-yun, LIU Qing-kuan, MA Xiao-nan, BAI Wu-yue. SEISMIC CONTROL OF TUNED DAMPERS FOR SEISMIC ISOLATED STRUCTURES UNDER NEAR-FAULT PULSE-LIKE GROUND MOTIONS[J]. Engineering Mechanics. DOI: 10.6052/j.issn.1000-4750.2023.01.0034
Citation: KANG Ying-jie, PENG Ling-yun, LIU Qing-kuan, MA Xiao-nan, BAI Wu-yue. SEISMIC CONTROL OF TUNED DAMPERS FOR SEISMIC ISOLATED STRUCTURES UNDER NEAR-FAULT PULSE-LIKE GROUND MOTIONS[J]. Engineering Mechanics. DOI: 10.6052/j.issn.1000-4750.2023.01.0034

近断层脉冲地震作用下调谐型阻尼器对隔震结构的减震控制

SEISMIC CONTROL OF TUNED DAMPERS FOR SEISMIC ISOLATED STRUCTURES UNDER NEAR-FAULT PULSE-LIKE GROUND MOTIONS

  • 摘要: 为研究调谐型阻尼器对隔震结构在近断层脉冲地震作用下的减震效果,基于H和H2优化准则整理了调谐质量(TMD)、非传统调谐质量(NTMD)、调谐惯容(TID)和调谐粘性质量(TVMD)等4种典型调谐型阻尼器的最优参数理论计算公式,筛选出100条近断层脉冲地震动作为输入,采用单自由度体系对隔震结构进行数值模拟,分析了优化准则、阻尼器类型和质量比、隔震结构周期和阻尼比、地震动差异等对减震效果的影响。结果表明:4种同质量比的调谐型阻尼器对隔震层位移的减震效果由低到高依次为TMD、NTMD、TID和TVMD,设计参数应优选H2优化准则;质量比为0.1的调谐型阻尼器对隔震周期小于等于3.5 s且阻尼比小于等于0.1的隔震结构的减震率可达10%~25%;调谐型阻尼器的减震率随质量比的增大呈对数增长趋势,由于地震动的差异而表现出显著的离散性,在时域内表现出发挥作用的滞后性;在元件参数取值相同时,TVMD的减震效果要明显优于其它常见阻尼器;TVMD对上部结构的绝对加速度响应有所减小或少量增加。建议优选TVMD控制隔震结构在近断层脉冲地震作用下的地震响应。

     

    Abstract: To study the seismic control of tuned dampers for seismic isolated structures under near-fault pulse-like ground motions, the theoretical formulas for the optimal parameters of four typical tuned dampers, including tuned mass damper (TMD), non-traditional tuned mass damper (NTMD), tuned inerter damper (TID) and tuned viscous mass damper (TVMD), were compiled based on the H and H2 optimization criteria. 100 near-fault pulse-like ground motions were selected as input, and the single-degree-of-freedom system was used to numerically simulate the seismic isolated structure. The effects of optimization criteria, damper type and mass ratio, period and damping ratio of seismic isolated structure, and difference of ground motions on the control effect are analyzed. The results show that the control effect of these four tuned dampers with the same mass ratio is TMD, NTMD, TID and TVMD in the order of low to high, and the design parameters should be optimized by the H2 criteria. The tuned dampers with a mass ratio of 0.1 reduce the displacement of the seismic isolation layer by 10% to 25% for the seismic isolated structure with isolation period less than or equal to 3.5 s and damping ratio less than or equal to 0.1. The control effect of the tuned dampers grows logarithmically with the increasing of mass ratio, and shows significant dispersion due to the difference in ground motions. The control effect of TVMD is significantly better than that of other conventional dampers under the condition that the element parameters are the same. The TVMD reduces or slightly increases the absolute acceleration response of the superstructure. Finally, it is recommended that the TVMD is preferred to control the seismic response of the isolated structure under near-fault pulse-like ground motions.

     

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