Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)
2003   Vol. 4   No. 3   p.317-323

Geometrical nonlinear stability analyses of cable-truss domes

GAO Bo-qing(¸ß²©Çà)(Department of Civil Engineering , Zhejiang University, Hangzhou 310027, China)
LU Qun-xin(¬ȺöÎ)(Department of Civil Engineering , Zhejiang University, Hangzhou 310027, China)
DONG Shi-lin(¶­Ê¯÷ë)(Department of Civil Engineering , Zhejiang University, Hangzhou 310027, China)

Abstract:The nonlinear finite element method is used to analyze the geometrical nonlinear stability of cable-truss domes with different cable distributions. The results indicate that the critical load increases evidently when cables, especially diagonal cables, are distributed in the structure. The critical loads of the structure at different rise-span ratios are also discussed in this paper. It was shown that the effect of the tensional cable is more evident at small rise-span ratio. The buckling of the structure is characterized by a global collapse at small rise-span ratio; that the torsional buckling of the radial truss occurs at big rise-span ratio; and that at proper rise-span ratio, the global collapse and the lateral buckling of the truss occur nearly simultaneously.
Keywords:Cable-truss dome, Geometrical nonlinear stability analysis, Parameter analysis, Cable distribution, Critical load

CLC Number:TU393.99 Document ID:A

Foundation Item:Project (No.50278086) supported by the National Natural Science Foundation of China
Author Resume:GAO Bo-qing,E-mail: bqgao@zjuem.zju.edu.cn

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Manuscript Received:2002 July 15

Manuscript Revised:2002 Oct. 20

Published:2003 June 1