Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (12): 112-119.doi: 10.3969/j.issn.1000-565X.2016.12.016

• Architecture & Civil Engineering • Previous Articles     Next Articles

Analysis of Imperfection Sensitive Region of Long-Span Elliptic Paraboloid Suspended Dome Structure

JIANG Zheng-rong1,2 SHI Kai-rong1,2 LIU Hong-liang1 CAI Jian1,2 LUO Bin3   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China; 3.School of Civil Engineering,Southeast University,Nanjing 210096,Jiangsu,China
  • Received:2016-03-02 Revised:2016-05-06 Online:2016-12-25 Published:2016-11-01
  • Contact: 石开荣(1978-)，男，博士，副教授，主要从事预应力钢结构、大跨度空间结构研究． E-mail:krshi@scut.edu.cn
  • About author:姜正荣(1971-)，男，博士，副教授，主要从事钢结构、大跨度空间结构研究． E-mail:zhrjiang@ scut． edu． cn
  • Supported by:
    Supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China during the“12th Five-year Plan”(2012BAJ03B06)

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Abstract:

A long-span elliptic paraboloid suspended dome structure,in which the clear span between supports is 110m ×80m and the rise of the upper single-layer reticulated shell is 9. 4m,is employed in the steel roof of Houjie Gymnasium.The imperfection sensitive regions of the structure and the corresponding single-layer reticulated shell are comparatively investigated by means of the advanced random imperfection mode method.On this basis,the in- fluences of the local topological form change and the half-span distribution of the live loads on the imperfection sen- sitive region of the suspended dome are further discussed.The results show that (1) the imperfection sensitive re- gion of the suspended dome is located in the upper single-layer reticulated shell; (2) the imperfection sensitive re- gion of the suspended dome is significantly different from that of the corresponding single-layer reticulated shell,and owing to the introduction of the lower cable-strut system,the imperfection sensitivity of the upper single-layer reticulated shell is remarkably improved; (3) by changing the local topological form,the imperfection sensitivity of the structure can be effectively reduced; and (4) the half-span distribution of the live loads has little influence on the imperfection sensitive region of the suspended dome with a traditional topological form,but has a significant in- fluence on the central region of the upper single-layer reticulated shell of this kind of suspended dome.

Key words: suspended dome, single-layer reticulated shell, stability random imperfection mode method, imper- fection sensitive region

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