Geometrical nonlinear stability analyses of cable-truss domes |
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| Authors: | Gao Bo-qing Lu Qun-xin Dong Shi-lin |
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| Institution: | (1) Department of Civil Engineering, Zhejiang University, 310027 Hangzhou, China |
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| Abstract: | The nonlinear finite element method is used to analyze the geometrical nonlinear stability of cabletruss 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.
Project (No. 50278086) supported by the National Natural Science Foundation of China |
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| Keywords: | Cable-truss dome Geometrical nonlinear stability analysis Parameter analysis Cable distribution Critical load |
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