[1]贾霞霞,沈朝勇,黄襄云,等.大跨度空间网架结构屋盖隔震设计研究[J].华南地震,2021,41(01):123-131.[doi:10.13512/j.hndz.2021.01.17]
 JIA Xiaxia,SHEN Chaoyong,HUANG Xiangyun,et al.Study on Roof Isolation Design of Long Span Space Grid Structure[J].,2021,41(01):123-131.[doi:10.13512/j.hndz.2021.01.17]
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大跨度空间网架结构屋盖隔震设计研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
41
期数:
2021年01期
页码:
123-131
栏目:
土木工程防震减灾
出版日期:
2021-03-20

文章信息/Info

Title:
Study on Roof Isolation Design of Long Span Space Grid Structure
文章编号:
1001-8662(2021)01-00123-09
作者:
贾霞霞1沈朝勇12黄襄云12黎静阳1
1. 广州大学工程抗震研究中心, 广州 510405; 2. 广东省地震工程与应用技术重点实验室, 广州 510405
Author(s):
JIA Xiaxia1SHEN Chaoyong12HUANG Xiangyun12LI Jingyang1
1. Earthquake Engineering Research &Test Center,Guangzhou University,Guangzhou 510405,China;2. Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology,Guangzhou 510405,China
关键词:
屋盖隔震隔震设计优化地震响应
Keywords:
Roof isolationOptimization of isolation designSeismic response
分类号:
TU352.12
DOI:
10.13512/j.hndz.2021.01.17
文献标志码:
A
摘要:
针对大跨度空间网架屋盖隔震结构响应的问题,采用简化后的质点力学模型,对其进行理论研究,分析质量比、刚度比、阻尼比对屋盖隔震结构地震响应的影响,以基底剪力最小为原则确定隔震层的最优参数。建立相应的三维有限元模型,对其进行屋盖隔震设计,分别与非隔震和基础隔震结构的响应对比。结果表明:屋盖隔震结构由于隔震层直接设置在屋盖支撑处,能明显减小上部网架的杆件轴力和支撑处的剪力。虽然其隔震层位置较高,但对结构的基底剪力和屋盖的挠跨比仍有减震效果;对于下部框架结构,直接与隔震层连接的框架的层间位移角有所减少,但未直接连接隔震层的较远部分框架的层间位移角略有增大,在结构设计时不容忽视,应适当加强。
Abstract:
Aiming at the response of the roof isolated structure with large-span space grid,the simplified particle mechanics model is adopted to analyze the influence of mass ratio,stiffness ratio and damping ratio on seismic response of this structure,and the optimal parameters of the isolation layer are determined based on the principle of minimum base shear. The corresponding three-dimensional finite element model is established to design the roof isolated structure,which is compared with the response of the base isolated structure and the non-isolated structure respectively. The results show that the axial force and the shear force at the support of the upper grid structure can be significantly reduced due to the isolation layer is directly located at the support of the roof,and the base shear force of the structure and the flexural span ratio of roof are also reduced. For the lower frame structure,the story drift ratio is reduced in part of the frame near the isolation layer,but increased slightly in the other part that not directly connected with the isolation layer,which can not be ignored in the structural design and should be strengthened appropriately.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-11-12
基金项目:国家重点研发计划(2017YFC1500705)资助
作者简介:贾霞霞(1995-),女,硕士研究生,主要从事防灾减灾及防护工程方面的研究。E-mail:1064344709@qq.com
通信作者:黄襄云(1966-),女,博士,教授,主要从事工程隔震及抗震研究。E-mail:eertchxy@gzhu.edu.cn
更新日期/Last Update: 2021-03-20