文档介绍：华中科技大学
硕士学位论文
高层隔震建筑设计的若干问题研究
姓名:熊伟
申请学位级别:硕士
专业:结构工程
指导教师:熊世树
20080601
华中科技大学硕士学位论文
摘要
基础隔震技术是人类抵御地震灾害一种的有利手段,但是长期以来主要应用于
中低层建筑,主要是由于高层建筑易使支座受拉和隔震效果相对较差。针对高层隔
震设计中的难点问题,本文对高层隔震建筑进行了概念设计,提出实用的设计方法
和设计流程。
本文基于大型结构有限元分析软件 ETABS,建立了大量的结构分析模型,得出
一系列关于高层建筑隔震设计的规律。首先确定了结构隔震后基本周期需要延长到
的程度,再以支座不出现拉应力为控制条件,对高层隔震结构的高宽比限值问题进
行了研究,得出了不同结构形式的隔震结构高宽比限值的建议值;通过调整上部结
构的层高、柱网开间大小和剪力墙的布置,对比支座出现拉应力的顺序,总结出最
晚出现拉应力时最优的上部结构布置方法。对隔震元件的参数设计以及相应于
ETABS 中的参数取值进行了说明,再根据隔震元件的参数进行隔震层布置,主要考
虑了偏心对隔震结构扭转的影响和强风作用下隔震层的稳定性,最后提出一种适用
于高层建筑隔震层布置的实用方法。
利用概念分析得到的规律总结出了适用于高层建筑基础隔震设计的流程,并绘
出相应的流程图,根据此设计流程分别对框-剪结构和框-筒结构两个工程实例进行
了隔震设计。分析验算表明,两栋高层隔震建筑上部结构均可按照降低设防烈度 1
度设计,且隔震结构的其余性能目标均能满足。
关键词:高层隔震建筑高宽比限值上部结构布置扭转隔震层布置
设计流程
I
华中科技大学硕士学位论文
Abstract
The base isolation technique is an effective method to withstand the earthquake for
building structures. However, the advanced technique is mainly applied to multi-story
buildings for a long time due to the following reasons: firstly, the isolators in high-rise
buildings are prone to be in tension; secondly the effect of isolation may be relative slight.
To cope with the difficulties in the base isolation design for high-rise buildings, we carry
through a conceptual design and present the design method and design process.
A number of representational structure models are created based on the FEA
program-ETABS. After the analysis a series of design rules can be gained. The natural
vibration period of the isolated structure should extend to a certain length. The
height-width ratio must be limited to a certain value for different structure types to avoid
the tension in the isolators. The upper structure arrangement will be modulated, including
the story height, space breadth and the arrangement of the shear walls, and then we can
find the sequence of the tension in the isolator. According to the sequence, when the
tension produces latest or slightest, the arrangement is optimal. This paper also pr