以大跨度格构式拱屋盖结构为研究对象，运用3D3S软件设计建模，对矢跨比为0.15、0.2、0.25、0.3、0.35的模型进行受力分析，取其第六榀结构数据进行结果分析，得到内力位移图。通过分析，指出了该结构的薄弱部位，并提出了在结构设计时选用矢跨比为0.2-0.3之间最佳，为格构式拱结构稳定性设计提供参考价值。%It takes large-span lattice arch roof structures as the research object, uses 3D3S software to design models, and has stress analyses of the models of the rise-span ratio of 0.15, 0.2, 0.25, 0.3, 0.35. Then it takes the data of the sixth cross structure to analyze the results. So the diagrams of axial force and displacement are obtained. Through the analysis, it points out the weak parts of the structure and puts forward that at the beginning of design for this structure ,the rise-span ratio of 0.2~0.3 should be chosen. These conclusions provide a reference for stability design of lattice arch structure.
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