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首页> 外文期刊>Journal of Zhejiang University Science: An international applied physics & engineering journal >Geometrical nonlinear stability analyses of cable-truss domes
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Geometrical nonlinear stability analyses of cable-truss domes

机译：索桁架穹顶的几何非线性稳定性分析

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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.
机译：非线性有限元方法用于分析具有不同电缆分布的电缆-桁架拱顶的几何非线性稳定性。结果表明，当电缆，特别是对角电缆分布在结构中时，临界载荷明显增加。本文还讨论了不同上升跨度比下的结构临界载荷。结果表明，在小跨度比的情况下，拉力电缆的作用更加明显。结构的屈曲特征是在小跨度比下整体坍塌。径向桁架的扭转屈曲发生在大的跨度比下。在适当的跨度比下，桁架的整体坍塌和横向屈曲几乎同时发生。

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