整体张拉钢桁架结构成型过程分析

根据梁-杆单元非线性有限元理论,结合大跨空间张拉整体桁架结构(ST)的特点,提出过度单元刚度矩阵,编制了该结构几何非线性分析程序,通过对该结构成型过程的弹塑性分析,阐述该结构成型的关键因素和控制参数,跟踪分析了成型过程的变形、内力等特性,比较了变化规律,对几个典型实例成型分析得出成型的合理范围。所得结果对类似结构的设计、施工提供依据,为实际工程奠定基础。

Analysis About The Shaping Process of Steel Strarch

Based on nonlinear finite element theory of beam-column element and combined with the characteristic of the large-span structure----Strarch, the excessive element rigidity matrix was proposed and the geometrically nonlinear static stability analysis program was made. Through the elastic-plastic analysis about the tension process of the structure, the key factors and controls parameters in the shaping process were expatiated. Following the characteristics in the tension process, such as the deformation, internal force, etc; rules of variety were compared and the rational range of shaping was drawn through several typical instances. The results can offer gist in designing or constructing similar structures and establish the foundation for the actual projects.