Geiger型索穹顶结构参数分析

Factor Analysis of Geiger Cable Dome

国内一些文献已经对索穹顶结构的静动力性能进行了一些研究,但涉及的参数比较单一,未能充分揭示其特性。本文运用空间非线性两节点直线杆单元和悬链线单元模拟索穹顶结构中的压杆和长索,对Geiger体系索穹顶结构进行全面参数分析(包括温度、预应力水平、构件截面面积、结构形体),得出了一些有益的结论,可以指导以后的索穹顶结构设计。

Some studies on the static and dynamic behavior of cable dome structure have been done by the researchers in our country, but the factors involved in the studies are simple and cannot thoroughly indicate the static and dynamic behavior of this kind of structures. In this paper, a nonlinear finite element program based on nonlinear bar element and catenary element is used to analyze the factors of the cable dome structure including temperature, prestress level, member section, and geometry. Finally, some valuable conclusions are proposed to guide the design of such structures.