位移相关摩擦阻尼器基础隔震结构地震响应分析

周强,姜文,刘肖

振动与冲击 ›› 2016, Vol. 35 ›› Issue (22) : 204-208.

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PDF(1228 KB)
振动与冲击 ›› 2016, Vol. 35 ›› Issue (22) : 204-208.
论文

位移相关摩擦阻尼器基础隔震结构地震响应分析

  • 周强,姜文,刘肖
作者信息 +

Seismic response of base isolated structure with displacement dependent friction dampers

  • Zhou Qiang, Jiang Wen, Liu Xiao
Author information +
文章历史 +

摘要

考虑了阻尼器中斜坡面反力对位移相关摩擦阻尼器输出力的贡献,从而完善了阻尼器的力学模型,并以一个典型的5层剪切型结构为例,评估了位移相关摩擦阻尼器对橡胶基础隔震结构抗震性能的影响。数值分析表明,位移相关摩擦阻尼器能减小常规地震作用下隔震层的位移响应,但是会增加隔震结构的底层剪力和顶层加速度;在近断层脉冲型地震波作用下,阻尼器能够显著降低隔震层位移,同时对上部结构的地震响应也有较好的抑制作用。此外,位移相关摩擦阻尼器的弹簧初始位移、弹簧刚度和楔块坡面角度这三个参数对隔震结构抗震性能的影响也进行了分析。

Abstract

A mechanical model of displacement dependent friction damper was improved by considering the contribution of slope reaction to output force generated by the damper. Then, taking a five-storey base isolated structure as an example, the influence of the damper on seismic-resistant behavior of base isolated structure with lead rubber bearings was evaluated. Numerical analysis showed that the friction damper could effectively reduce the displacement of isolation floor while increase the base shear force and the top floor acceleration of main structure under normal seismic excitation. When the building subjected to the near-fault pulse-type earthquake, the displacement of isolation floor was significantly reduced and to some extend the seismic response of the main structure was also suppressed. In addition, the influence of three main parameters determining mechanical property of the displacement depended friction damper, that is, initial displacement and stiffness of spring as well as slope angle, on seismic response of the isolated structure was also investigated.

关键词

位移相关摩擦阻尼器 / 基础隔震 / 近断层脉冲型地震 / 常规地震 / 地震反应

Key words

displacement dependent friction damper / base isolation / near-fault pulse-type seismic / normal earthquake / seismic response

引用本文

导出引用
周强,姜文,刘肖. 位移相关摩擦阻尼器基础隔震结构地震响应分析[J]. 振动与冲击, 2016, 35(22): 204-208
Zhou Qiang, Jiang Wen, Liu Xiao. Seismic response of base isolated structure with displacement dependent friction dampers[J]. Journal of Vibration and Shock, 2016, 35(22): 204-208

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