[1]魏德敏,张超.弦支穹顶屋盖结构的风振响应研究[J].地震工程与工程振动,2013,33(02):074-80.
 WEI Demin,ZHANG Chao.Investigation on the wind induced vibration response of suspendome roof structures[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2013,33(02):074-80.
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弦支穹顶屋盖结构的风振响应研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
33
期数:
2013年02期
页码:
074-80
栏目:
出版日期:
2013-04-28

文章信息/Info

Title:
Investigation on the wind induced vibration response of suspendome roof structures
作者:
魏德敏 张超
华南理工大学 土木与交通学院 亚热带建筑科学国家重点实验室, 广东 广州 510640
Author(s):
WEI Demin ZHANG Chao
School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China
关键词:
弦支穹顶风振响应时程分析
Keywords:
suspendome roofwind vibration responsetime-history analysis
分类号:
TU393.3;P315.92;TU352.11
摘要:
弦支穹顶屋盖结构的自重较轻,风荷载作用是结构设计的控制因素,应当对其风振动力响应进行研究。本文采用AR法并结合MATLAB软件对某体育馆椭圆形弦支穹顶屋盖结构的风速时程进行模拟分析,然后进行结构风振响应时程的有限元分析,得出了结构的风振系数和一些有意义的结论:其节点位移风振系数为1.74,位移风振系数随着初始预应力水平的增大而增大;风振响应过程中,拉索的预应力有所降低,靠近结构中心位置拉索的预应力损失率比靠近外部的大;初始预应力越大,预应力损失率越小;弦支穹顶结构环索预应力水平的降低会对结构的风振响应有不利的影响;弦支穹顶屋盖结构只考虑等效静力风荷载作用的结构抗风设计偏于不安全,应当考虑脉动风的作用。
Abstract:
The dead weight of suspendome roof structures is comparatively light, so the wind load is always considered as the control factor in the structural design. The wind induced vibration response is investigated in this paper. The computational simulation for the wind field of the elliptic suspendome structure is carried out, and the dynamic responses of the structure in the time domain are analyzed by using the finite element method. Some useful conclusions and the wind induced vibration coefficient of the nodal displacement are obtained. It is found that the wind induced vibration coefficient increases with the increasing of the initial prestressing force. The prestress of cables gets decreasing in the wind induced vibration process, and the prestress loss ratios of cables near the centre of the structure are larger than those in the outer parts. The higher the initial prestress is, the lower the loss ratio is. The decrease of the prestressing force of the circle cable has negative effects on the wind induced vibration response of the suspendome structure. It is unsafe if only the equivalent static wind load is considered in the wind-resistant design of suspendome roof structures, and the effect of the fluctuating wind should be taken into account too.

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备注/Memo

备注/Memo:
收稿日期:2012-4-19;改回日期:2013-3-9。
作者简介:魏德敏(1955-),女,教授,博士,主要从事工程结构防灾减灾研究.E-mail:dmwei@scut.edu.cn
更新日期/Last Update: 1900-01-01