高层隔震结构双质点模型的地震响应单纯质点法研究

刘阳 刘文光 何文福 杨巧荣

振动与冲击 ›› 2013, Vol. 32 ›› Issue (1) : 8-13.

PDF(1525 KB)
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振动与冲击 ›› 2013, Vol. 32 ›› Issue (1) : 8-13.
论文

高层隔震结构双质点模型的地震响应单纯质点法研究

  • 刘阳1 刘文光1 何文福1 杨巧荣2
作者信息 +

Pure Mass Model Method of High-rise Isolation Structure Two mass model Seismic Response

  • LIU Yang1, LIU Wenguang1, HE Wenfu1 , YANG Qiaorong2
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摘要

文中针对高层隔震结构的双质点简化模型提出了可快速计算其地震响应的单纯质点法,该方法基于基底剪力及能量等效原则来建立简化两质点分析模型与原结构模型之间的转换关系及简化模型的参数取值,推导得到了确定地震反应的两个关键参数:刚度转换系数和质量比。研究基于能量平衡方法提出了高层隔震结构简化分析模型包络反应的计算式,并通过利用能量平衡原理及模型参数转换关系来预测原高层隔震结构的各层地震反应包络值。文中对22层高层隔震结构工程实例首先进行了双质点模型的转化,其后验证了单纯质点法的有效性和分析精度,分析结果表明新方法计算结果与多质点模型时程分析法计算结果相近,且能包络上部结构各层地震响应。本文所提方法计算量少,参数取值简便,可用于高层隔震结构地震响应的初步分析。

Abstract

Aiming at two-mass simplified model of high-rise isolated structure, the pure mass model method (PMM) which can be utilized to calculate earthquake responses quickly for high-rise isolated structures is proposed in the paper. Firstly, transformational relation and parameters of two mass simplified model and archetype are established according to equivalent criteria for base shear and energy. And then, two key parameters: stiffness transformational coefficient and mass ratio are obtained to determine seismic responses. Envelop responses calculation formulas of simplified model are proposed based on energy balance method in the study. Energy balance methods and models transformational relations are used to analyze the seismic response envelop values of every layer of archetype. At first, the 22 stories high-rise isolated structure of engineering example is transformed into two-mass simplified model. Thereafter, the suitability and calculation accuracy of pure mass model method are verified. It is shown that computational results of new method are similar to the results of multi-mass model time history analysis method. The calculation amount of the method proposed is less, and parameters determination is clear and convenient. The calculation method can be applied to analyze the earthquake responses of high-rise isolated structures.

关键词

高层隔震结构 / 单纯质点法 / 简化模型 / 参数取值方法 / 能量平衡

Key words

high-rise isolation structure / pure mass model method / simplified model / parameters determination methods / energy balance

引用本文

导出引用
刘阳 刘文光 何文福 杨巧荣. 高层隔震结构双质点模型的地震响应单纯质点法研究[J]. 振动与冲击, 2013, 32(1): 8-13
LIU Yang;LIU Wenguang;HE Wenfu;YANG Qiaorong. Pure Mass Model Method of High-rise Isolation Structure Two mass model Seismic Response[J]. Journal of Vibration and Shock, 2013, 32(1): 8-13

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