叉筒网壳子结构圆柱面交叉立体桁架系巨型网格结构的稳定性研究

本文针对子结构为单层叉筒网壳的圆柱面交叉立体桁架系巨型网格结构,分析了结构的构成、形体参数、支承方式等;建立了几何非线性力学模型,编制了相应的稳定分析程序;针对本结构的特点,着重研究了结构的稳定性能、失稳形式(局部失稳与整体失稳),以参数分析的形式研究了结构局部失稳与整体失稳的关系,找出了不同跨度结构在整体与局部失稳临界状态某些参数的取值规律,并给出了整体与局部失稳状态的分界曲线,可为该结构形式的工程应用提供参考。

Research on cylindrical latticed intersected three dimensional beamsystem reticulated megastructure with single layerlatticed intersected cylindrical shell substructure

For the cylindrical latticed intersected three dimensional beam system reticulated megastructure with single layer latticed intersected cylindrical shell substructure, the construction of structure, form parameters and support conditions are analyzed in this paper. Geometric nonlinear mechanical model is set up with the stability analysis program developed. In connection with the characteristic of this structure, the stability and buckling styles (overall buckling and local buckling) are researched in detail. The relationship between overall buckling and local buckling is investigated through parameter analysis. Various laws of parameters are found on critical state between overall buckling and local buckling of structures with different spans, and it is showed by boundary curves of overall and local buckling. All this work will provide a reference in theory for the use of such structures.