凯威特主-子巨型网格结构的力学性能研究

Mechanical Property Analysis of the Kiewitt Main-sub Mega-structure

应用有限元软件ANSYS分析了凯威特主-子巨型网格结构的力学性能。在考虑初始几何缺陷和几何非线性的情况下,利用牛顿—拉夫拉逊法分析结构的弹性稳定性能。在考虑几何非线性的情况下,分析结构的基本静力性能,总结桁架上下弦杆的应力分布规律。研究结构的矢跨比、立体桁架高度因子、支承方式等参数对桁架上下弦杆应力分布规律的影响。考虑主-子结构协同承载时的静力性能。为工程设计提供了参考。

The mechanical property of the kiewitt main-sub mega-structure was analyzed with ANSYS. This article studied the geometrical form parameters of the Kiewitt main-sub mega-structure. Under the condition of initial geometrical imperfection and geometric nonlinearity, the elastic stability performance of this structure was investigated. Considering the geometric nonlinearity, basic static behaviors of the structure was analyzed and stress distribution of top and bottom chord of the truss was summarized. The influence of height-to-span, truss height, and the area of bar cross-section on stress distribution of the truss top and bottom chords were discussed. Besides, static behaviors of the main-substructure were analyzed.