【作者】 林云腾；

【导师】 祁皑；

【作者基本信息】 福州大学 ， 结构工程， 2005， 硕士

【摘要】 本文通过理论分析和数值计算研究了层间隔震结构的工作机理、地震反应规律;优化了影响层间隔震结构减震效果的主要参数;提出了层间隔震结构的设计思路。本文的研究发现,层间隔震结构的工作机理与隔震层的位置有很大关系:隔震层设置在较低位置时,其工作机理与基础隔震结构的相似;隔震层设置在较高位置时,其工作机理与调频质量阻尼器(TMD)系统的相似,两种情况下工作机理完全不同。研究还发现隔震层的水平刚度、位置和阻尼比是影响层间隔震结构减震效果的主要参数。一般情况下,隔震层的位置越低,水平刚度越小,阻尼比越大,结构的减震效果就越好。全文共分为4章。第一章:绪论。本章对层间隔震的定义、适用范围、特点以及研究现状进行了阐述;介绍了本文研究的主要工作内容、意义和方法。第二章:层间隔震理论研究。本章介绍了基础隔震结构和TMD系统的工作机理;建立层间隔震结构的动力分析模型和振动方程;采用随机振动分析方法,推导了层间隔震结构在简谐荷载作用下,上、下部结构的层间位移和绝对加速度反应的均方值解析表达式;最后,对表达式中的可变参数进行分析,总结层间隔震结构的工作机理。第三章:层间隔震结构地震反应分析。本章确定了层间隔震结构多质点的计算模型,并建立其振动方程;选定地震波,并对地震波的峰值进行调整;最后,通过改变隔震层的水平刚度、位置和阻尼比等参数,输入不同地震波分别计算层间隔震结构的地震反应,并对计算结果进行分析,总结层间隔震结构的地震反应规律。第四章:层间隔震结构影响参数优化与设计。本章根据第二章的理论分析和第三章的数值分析结果,提出影响层间隔震结构减震效果的主要参数及其参数的优化方法,并给出各种参数的最优取值;最后,还提出了层间隔震结构的设计思路。最后,对全文工作进行总结,归纳本文的主要结论。更多还原

【Abstract】 The mechanism and seismic response regulations of story isolation structure are studied in this thesis. The main parameters which affect the effect of isolation and the design method of story isolation structure are proposed. The analysis results show that the mechanism of story isolation structure has been significantly influenced by the location of the isolation layer. When the location of isolation layer is approach to the base of structure, its mechanism is similar to that of base-isolation structure; And when the location is approach to the roof of structure, its mechanism is similar to that of the Turned Mass Damper (TMD). The two kinds of mechanism are very different. At the same time, the analysis results also show that the main parameters affecting the isolation effect of story isolation are lateral stiffness、location and damping ratio of isolation system. In general, the lower of the isolation system and the larger damping ratio, the better isolation effect. There are four chapters in this thesis.In the first chapter, the development and current situation of story isolation are summarized, including its applicable range、its advantages、its applications in practical engineering. And the contents and significance of this thesis are provided at the end of the chapter.In the second chapter, the mechanism of story isolation is studied. Firstly, the mechanism of base-isolation and the mechanism of TMD are introduced respectively. Secondly, after the mechanical model and the dynamic differential equation of the isolation structure are set up, the formulas of the relative displacement and the absolute accelerative speed are deduced by the random vibration theory. And the mechanism of story isolation is summarized.In the third chapter, the seismic response of story isolation structure is analyzed by the numerical method. The dynamic model is set up. The seismic response of story isolation structure are calculated under different seismic wave by changing the main parameters. The results of calculation are analyzed. The regulations of seismic response of story isolation are summarized.In the fourth chapter, according to the results from the second chapter and the third chapter, the main parameters which affect the effect of isolation are proposed, and their optimum value are obtained. In the end, the design method of story <WP=4>isolation structure is proposed, too.Finally, some conclusions are generalized at the end of this thesis.更多还原