Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (4): 112-117.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Frequency Domain Analysis for Wind-Induced Vibration Response of Long-Span Cable Dome Structures

Wei De-min  Xu Mu  Li Di   

  1. State Key Laboratory of Subtropical Building Science//School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-11-20 Revised:2012-01-05 Online:2012-04-25 Published:2012-03-01
  • Contact: 魏德敏(1955-) ，女，教授，博士生导师，主要从事工程结构防灾减灾研究． E-mail:dmwei@scut.edu.cn
  • About author:魏德敏(1955-) ，女，教授，博士生导师，主要从事工程结构防灾减灾研究．
  • Supported by:

    亚热带建筑科学国家重点实验室创新探索项目( 20102CZ23)

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Abstract:

In this paper,two finite element models are established to respectively analyze the wind-induced vibration response of cable dome structures with and without top cable-membrane. Then,the structural mode and the wind-induced vibration response in the frequency domain are analyzed through an engineering example,and the standard deviation of the displacement responses to the fluctuation wind load is obtained. The results show that ( 1) the suitable number of dominant modes increases with the enlargement of the span; ( 2) for the cable-dome-like structures with a span longer than 100m,the number of dominant modes is suggested to be more than 450; ( 3) the standard deviations of the node displacements of both the cables and the poling in CSM are less than those in CS; ( 4) the envload affection of the membrane can not be ignored in CSM; ( 5) in CSM,the structural pulse wind energy is mostly dissipated by the membrane; and ( 6) top cable-membrane greatly affects the wind-induced vibration response of long-span cable dome structures.

Key words: cable dome, wind-induced vibration response, frequency domain analysis, modal analysis, finite element method