规则型隔震房屋的自振特性和地震反应分析方法  

Simplified analysis method of seismically isolated regular building

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：《地震工程与工程振动》2002年第2期33-41,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目 ( 5 9895 410 )

摘　　要：文中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 ,两式的复杂程度虽几无差异 ,但文中的公式更为精确。文中提出的简化计算公式可以方便地在一般房屋结构隔震方案设计和地震反应的振型叠加分析中应用。According to the distribution peculiarity of shear stiffnesses and masses of seismically isolated regular building along height ,the improved formulas of nodal damping ratio are proposed. Besides, formulas of natural frequencies,modes and earthquake responses of regular building are summarized. The numerical comparison between proposed modal damping ratios and the corresponding ones given by Kelly are carried out. And the results of comparison indicate that the proposed approximate formulas of nodal damping ratio in this paper are more accurate, though thd complexity of the two types of approximate formulas is almost the same. However, the proposed simplified formulas can be easily applied in schematic design of the seismically isolated regular building and mode superposition analysis.

关 键 词：自振特性 地震反应分析方法 规则型房屋 隔震 振型阻尼比 刚度 质量 

分 类 号：TU352.12[建筑科学—结构工程]