【作者】 王伟刚；

【导师】 盛宏玉；

【作者基本信息】 合肥工业大学 ， 结构工程， 2005， 硕士

【摘要】 隔震结构体系是区别于传统抗震结构体系的一种被动控制体系,通过设置隔震层来吸收并消耗地震能量,减小结构的地震反应,确保结构的安全。隔震结构体系改变了传统抗震结构体系的耗能原理,即通过隔震层的耗能装置、而不是结构和结构构件来吸收并消耗地震能量,这种优越的耗能特性是传统抗震结构体系所不能够实现的。经过近三十年的研究,隔震技术在应用基础理论和工程应用等方面取得了较大的研究成果,世界上己经有近二十个国家和地区兴建了隔震建筑。1994年Northridge和1995年神户发生的大地震强震观测记录表明,这种隔震结构体系是有效的减轻地震灾害的新型结构体系之一。 本文以框架结构作为研究对象,探讨采用基底隔震技术后的减震效果及其地震反应的特点。为此,借助有限元分析软件ANSYS对结构进行非线性动力时程分析。计算中对框架结构采用空间杆系模型,对隔震装置采用双线性弹簧模拟。文中以一幢五层框架结构为算例,分别考虑不隔震(传统抗震方案)、以夹层橡胶支座Ⅰ作为隔震装置的基础隔震和以夹层橡胶支座Ⅱ作为隔震装置的基础隔震三种方案,对其由地面输入El-centro波,进行了大量的计算分析比较,得出了一些有益的结论。 论文对三种方案的抗震效果进行了比较。研究表明:框架结构采用橡胶垫隔震支座时具有明显的隔震效果,它能大大减轻结构的水平地震作用。而且隔震结构的基底剪力、层间位移、各层加速度都远远小于不隔震结构的计算结果。同时,由于上部结构地震作用的减弱,结构本身的抗震措施可以大大减少,从而达到降低造价和改善房屋使用功能的目的。 由于隔震结构的某些特殊性以及目前研究还不完善,进行优化设计是必要的,本文对优化设计的内容和方法做了研究。同时,根据隔震结构受力、变形特点,给出了增加隔震装置后细部结构的设计。更多还原

【Abstract】 Seismic isolated structure system is a passive active control system, which is different from traditional anti-seismic structure system. Through setting isolation layer, earthquake energy is absorbed and dissipated and earthquake response of structure is reduced, so that the safe of structure is ensured. Isolated structure system changes the energy dissipation mechanism of traditional anti-seismic structure, i.e. the earthquake energy is absorbed and dissipated by energy dissipative device set in a isolation layer rather than by the structure and structure elements. This excellent energy dissipation characteristic can not be realized by traditional anti-seismic structure. After studying for thirty years, many research results of applied foundation theory and engineering application of isolation technique have been obtained. Up to now, near twenty countries and region in the world have constructed isolated buildings. The strong motion observation records of Northridge earthquake 1994 and Kobe earthquake 1995 have indicated that this isolated structure system is one of the effective and new type structure system for earthquake disaster reduction.In this paper, the seismic reduction effectiveness and earthquake response offrame structure building adopting base seismic isolation is studied. A finite elementANSYS program used to dynamic time history analysis was developed to analyze the character of the nonlinear structure. Beam-column elements modal and bilinear spring is used to describe the mechanic character frame structure. And a five stories frame structure with basement isolation, a same structure with basement isolation I and a same structure with basement isolation II are analyzed as a example in this paper. The El-centro earthquake wave was inputted on the structure. Some useful results are obtained through lots of comparative analysis.The research results illustrate that frame structure with basement isolation can reduce the horizontal earthquake response of superstructure effectively compared with traditional technique. This method is very effective, base shear, floor deformation, acceleration of isolation structure is less than no isolation structure. At the same time, because of superstructure seismic functionary decrease, seismic measure is less than no isolation structure distinctly. Accordingly obtain lowerbuilding price and improved house useful function.Because of particularity of basement isolation structure and current research is not perfect, So optimizing design is necessary, The contents and methods of optimizing design is studied. At the same time, According to the character of force and distortion, giving the construct desire.更多还原