隔震体系基于双质点模型的参数分析比较  

Research on Working Mechanism and Impact Parameters of Three Types of Isolation Structure

作　　者：樊长林[1] 张善元[1] 张文芳[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《太原理工大学学报》2008年第3期320-323,330,共5页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目(20051053)

摘　　要：借助简化的竖向串联双自由度体系统一地描述了顶部隔震（TMD系统）、基础隔震、层间隔震三种减震控制方式力学特点,揭示了三者的减震机理。以上、下部分的质量比、频率比和阻尼比等参数,计算了复频响应函数模值的变化曲线,分析了这些动力学参数对隔震系统减震效果的影响。研究分析表明：根据质量比值不同可以区分三种隔震方式;顶部隔震结构频率比最佳为0.8～1.2,隔震系统的阻尼比越大减震效果越好;基础隔震结构的频率比最佳为1.2～2.0,隔震系统的最佳阻尼比为0.1～0.3;层间隔震质量比越大,隔震效果越好,最佳频率比为0.2～0.6.In this paper a two-degree-of-freedom system in vertical direction is used to describe mechanical behavior and reveal isolation mechanism of top-storey isolation （TMD system）, base isolation and mid-storey isolation. Taking mass ration, natural frequency ration and damping ration as parameters, the module of complex frequency response function are calculated. The effects of these dynamic parameters on isolation are analyzed. It indicts that three of kinds of isolation structures are specified by ratio of mass,the proper frequency ratio of top-storey isolation is 0.8 - 1.2, and damping ratio is bigger, the effect is better; the proper frequency ratio of base isolation is 1.2 - 2.0, the proper damping ratio of isolation system is 0.1 0.3 ; with respect to mid-storey isolation,mass ratio is bigger ,the effect is better,and the proper frequency ratio is 0.2 - 0.6.

关 键 词：隔震结构 TMD减震体系 层间隔震 基础隔震 复频响应函数 

分 类 号：P315.966[天文地球—地震学]