索穹顶(Cable Dome)结构的特性及分析

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。

A Study on Structural Behavior and Analysis of Cable Domes

In this paper,the authors make a discussion on structural behavior and working mechanismof cable domes,then present a new analytical model employing a nonlinear curve pin-joint elementwith 5 nodes in consideration of unusual strain property.The fundamental equation as well as ele-ment matrices are derived in the curvilinear coordinates system,Numerical results show that thetheory and analytical model provided in this paper are correct and available for both morphologyanalysis and nonlinear analysis of cable domes with high accuracy.Also,it can be used as the fun-damental theory and method for designing cable domes.