大跨度拱支网壳结构体系及静力性能研究

拱支网壳结构体系是在综合了网壳(网架)及拱结构等的优点的基础上，构思出的一种新型大跨空间结构形式．论述了该结构形式的合理性，提出了该结构体系具有代表性的多种结构形式．再与纯单层网壳对比，就该结构体系的静力性能进行比较分析，并对三个缩尺模型的静力稳定作了试验研究．结果表明该杂交结构能充分发挥两种结构形式的受力特点，整体受力性能在极限承载力、缺陷敏感性、结构延性等方面都得到明显改善，显示出该新型杂交结构体系将具有较广阔的应用前景．

Arch-supported reticulated shell structures and their mechanical behaviors

Based on the structural features of reticulated shells, arch structures, etc., arch-supported reticulated shell structrues have been developed as a new large-span space structural system. In this study, the reasonability of this hybrid structural system and the reasonable combination of arch structures and reticulated structures with different Gaussian curvatures were investigated. Then, with the aim to compare it with normal singe-layer reticulated shells, the mechanical behavior of hybrid structures was investigated through nonlinear analysis and test of three typical models, especially on the effects of initial geometrical imperfection. Analysis indicated that hybrid structures can efficiently weaken the geometrical imperfection sensitivity of normal single-layer reticulated shells and improve their mechanical behaviors, thus proving that this type of hybrid structures can be widely used.