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The construction of the cables is a key step for erecting suspen-dome structures. In practical engineering, it is difficult to ensure that the designed pre-stresses of cables have been exactly introduced into the structures in the site; so it is necessary to evaluate the influence of the variation of the pre-stresses on the structural behavior. In the present work, an orthogonal design method was employed to investigate the pre-stressed cables'sensitivity to the suspen-dome system. The investigation was concentrated on a Kiewitt suspen-dome. Parametric studies were carried out to study the sensitivity of the structure's static behavior, dynamic behavior, and buckling loads when the pre-stresses in the cables varied. The investigation indicated that suspen-dome structures are sensitive to the pre-stresses in all cables; and that the sensitivity depended on the location of the cables and the kind of structural behavior. Useful suggestions are given at the end of the paper. 相似文献
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The construction of the cables is a key step for erecting suspen-dome structures. In practical engineering, it is difficult to ensure that the designed pre-stresses of cables have been exactly introduced into the structures in the site; so it is necessary to evaluate the influence of the variation of the pre-stresses on the structural behavior. In the present work, an orthogonal design method was employed to investigate the pre-stressed cables' sensitivity to the suspen-dome system. The investigation was concentrated on a Kiewitt suspen-dome. Parametric studies were carried out to study the sensitivity of the structure's static behavior, dynamic behavior, and buckling loads when the pre-stresses in the cables varied. The investigation indicated that suspen-dome structures are sensitive to the pre-stresses in all cables; and that the sensitivity depended on the location of the cables and the kind of structural behavior. Useful suggestions are given at the end of the paper. 相似文献
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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 相似文献
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研究生培养质量保证体系及评价体系研究 总被引：6，自引：0，他引：6
本文在总结多年培养研究生工作经验，结合当前研究生培养的客观条件，研究培养质量的物质保证、精神保证、生源保证及指导方式的基础上，提出了研究生质量评价体系。实践证明，采用本体系指导研究生，其培养质量能得到较大幅度的提高。 相似文献
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对随机风荷载下K6型单层球面网壳的整体疲劳问题进行了研究。用AR法模拟Kaimal谱多点互相关的脉动风风速时程,确定结构所承受的荷载谱,通过有限元时程分析和雨流计数法得到杆件的应力循环历史,采用疲劳设计方法中的总寿命法计算杆件的疲劳损伤度,分析结构在不同矢跨比、不同平均风速下结构的抗疲劳性能。研究发现,结构中出现疲劳的杆件数随矢跨比的减小而逐渐增加,结构中杆件最大疲劳损伤度D随着矢跨比的减小而逐渐增大。网壳的疲劳薄弱区域主要与结构的振型有关;矢跨比较大时,结构中环向杆件易出现疲劳,随着矢跨比的减小,结构径向肋两侧的斜杆易出现疲劳。 相似文献
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INTRODUCTIONThetensegritystructurecomposedofcablesandbarsisoftwotypes.Oneistheflexibletensegritystructure.Thistypeofstructurehasnostiffnessandtheshapeofthestructureisnotde terminedwhennoprestressisapplied .Theform findingprocessfortheinitialequilibriumisa… 相似文献
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