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本文首先论述了索穹顶结构的特性和工作机理,根据结构的特点,提出了考虑单元非常应变特性的非线性五结点曲线铰接单元,在单元曲线坐标系中建立了单元的有限元基本方程及单元的刚度矩阵。数值分析结果表明,本文提出的分析模型,理论是正确的,采用的计算方法是有效的,并具有很高的精度,可作为设计索穹顶结构的基础理论和方法,应用于索穹顶结构的形态分析和非线性分析。
This paper first discusses the characteristics and working mechanism of the cable dome structure. According to the characteristics of the structure, a nonlinear five-node curve articulated unit is proposed, taking into account the element’s extraordinary strain characteristics. The basic finite element equations of the element are established in the unit curve coordinate system. The stiffness matrix of the unit. The numerical analysis results show that the analysis model proposed in this paper is correct in theory, and the calculation method used is valid and has high accuracy. It can be used as a basic theory and method for designing cable dome structures, and applied to the shape of cable dome structures. Analysis and nonlinear analysis.