某高层建筑隔震设计方案比选及参数分析

发布时间：2018-04-04 09:34

本文选题：隔震方案　切入点：隔震支座　出处：《广州大学》2014年硕士论文

【摘要】：地震是不可避免的重大自然灾害，它会造成重大的经济损失和大量的人员伤亡，而我国是世界两大地震带交汇区，地震频发。地震之所以造成那么大危害，很大程度上是因为建筑和构筑物的抗震不良，因此提高建筑的抗震性能是势在必行的，而隔震是行之有效的抗震手段。近年来，由于用地紧张、人口集中的原因，高层建筑在我国迅速兴起，它遭受地震作用破坏和倒塌的后果就更加严重，所以高层建筑隔震技术的发展就更为迫切。本文主要针对高层建筑隔震设计过程中如何取得最优隔震设计效果的问题开展研究，是基于已有的隔震设计规范，在参考国内外已有的相关研究内容的基础上加以深入研究。本文根据拟建实际工程，由已定的隔震设计目标，进行方案设计比选和参数分析。首先根据面压值、屈重比及偏心率等进行隔震支座的布置及选型，，进行单纯隔震方案的设计比选。然后在布置隔震支座的基础上通过增删剪力墙，查看隔震效果。最后采用隔震和阻尼器联合应用的方案，对比其隔震效果，并对阻尼器的阻尼指数、阻尼系数等进行分析，选出最佳参数，进而得出最佳隔震方案。以最佳隔震方案为基础，探讨刚性楼板假定和弹性楼板假定情况对高层隔震建筑的不同影响，对两种假定下有限元模型的计算结果进行对比分析。以最佳隔震方案为基础，在PKPM模型的基础上，把三维模型简化为只有横向刚度的弹簧杆和质点串的力学分析模型即剪切模型，并针对层间位移角、减震系数、隔震层位移等参数，分析对比剪切模型和三维模型之间的差别，验证采用简化模型的可行性。
[Abstract]:Earthquake is an inevitable major natural disaster, it will cause great economic losses and a large number of casualties, and China is the intersection of the two major seismic zones in the world, earthquakes occur frequently.The reason why the earthquake causes so much harm is largely due to the poor earthquake resistance of buildings and structures, so it is imperative to improve the seismic performance of buildings, and isolation is an effective means of earthquake resistance.In recent years, because of the shortage of land and the concentration of population, high-rise buildings are rising rapidly in our country, and the earthquake damage and collapse are more serious, so the development of isolation technology for high-rise buildings is more urgent.This paper mainly focuses on how to obtain the optimal isolation design effect in the process of isolation design for high-rise buildings. It is based on the existing isolation design specifications and based on the reference to the relevant research content at home and abroad.In this paper, according to the actual project to be built, the scheme design comparison and parameter analysis are carried out according to the established seismic isolation design target.Firstly, according to the value of surface pressure, the ratio of yield to weight and eccentricity, the isolation support is arranged and selected, and the design of isolation scheme is compared.Then on the basis of the layout of the isolation support through adding and deleting shear walls to see the isolation effect.Finally, the isolation effect is compared by using the method of the combination of isolation and damper. The damping index and damping coefficient of the damper are analyzed, and the optimum parameters are selected, and the optimum isolation scheme is obtained.Based on the optimal isolation scheme, the different effects of rigid and elastic floor assumptions on high-rise isolated buildings are discussed, and the results of finite element models under the two assumptions are compared and analyzed.Based on the optimal isolation scheme and the PKPM model, the three-dimensional model is simplified as the shear model of spring rod and mass string with only transverse stiffness.The difference between shear model and 3D model is analyzed and compared, and the feasibility of simplified model is verified.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.31

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