规则型隔震房屋的自振特性和地震反应分析方法  

The Simplified Analysis Method of Seismically Base Isolated Regular Buildings

作　　者：李中锡[1] 周锡元[1] 

机构地区：[1]中国建筑科学研究院工程抗震研究所,北京100013

出　　处：《建筑科学》2001年第5期14-18,共5页Building Science

基　　金：国家自然科学基金资助项目 (项目批准号 :5 9895 410 )

摘　　要：根据规则型隔震房屋的刚度、质量和阻尼分布的特点 ,改进了阻尼比的简化计算表达式。此外 ,还归纳给出了自振周期、振型和地震反应计算公式。文中还将我们提出的隔震结构振型阻尼比公式与Kelly的相应公式进行了数值比较 ,两者的复杂程度虽几无差异 ,但本文的公式更为精确。文中提出的简化计算公式可以方便地在规则型房屋结构隔震设计中加以应用。According to the distribution characteristics of shear stiffnesses, masses and damps of seismiclly base isolated regular buildings along height, the simplified formulas of mode damping ratio are improved. Besides, formulas of natural frequencies, modes and earthquake response of regular buildings are summarized. The Numerical comparison between proposed mode damping ratios and the corresponding ones given by Kelly is carried out. And the results of comparison indicate that the proposed approximate formulas of mode damping ratio in this paper are more accurate, though the expression of the approximate formulas is as simple as the Kelley's. As a result, the proposed simplified formulas can be easily applied in design of the seismically base isolated regular buildings .

关 键 词：规则型房屋 隔震 振型阻尼比 地震反应 

分 类 号：TU352.12[建筑科学—结构工程]