中文摘要：

单层网壳结构杆件截面尺寸和杆件分组方式直接影响结构的强度、刚度、局部稳定性以及整体稳定性，应存在一种合理的截面取值和杆件分组方式，使网壳结构受力合理、节约耗钢量．本文对跨度60m、矢高6m的单层凯威特网壳结构模型进行了线性静力分析、几何非线性整体稳定性分析和三种杆件分组方式下的截面优化设计，并详细分析了杆件分组和截面变化对结构整体稳定性的影响，给出了杆件分组、截面取值方式的建议，使结构用钢量少、受力较合理，同时杆件种类少、便于施工．

英文摘要：

Different section size and bar group directly impacts t global stability of single layer latticed shell. There is a reasonab he strength, rigidity, le selection of section makes stress distribution more reasonable and save the steel volumes. The analysis, geometric nonlinearities global stab single layer Kiewit dome which a span of symmetry areas is 6, and number of radial structure due to the change on grouping and ility a node nalysis and sectional optimizatio linear n was local stability find size and bar group static mechanical carried out for the eters and a rise of 6 meters. Number of circle hoop cycles is 5. The impact on the overall stability of the cross-section is investigated. Finally, a suggestion was given about rods grouping and cross-sectional values which could cut down steel consumption, form logical bearing stress, and has much less types of bars which are easier to construcnon.