柱面拱支网壳静力性能分析

拱支网壳结构体系是在综合了网壳(网架)及拱结构的优点的基础上,构思出的一种新型大跨度空间杂交结构形式。通过与一般柱面单层网壳结构的对比,对不同矢跨比的单层柱面拱支网壳结构考虑不同拱肋配置下的静力性能,特别是结构极限承载能力及对初始几何缺陷的敏感性进行了分析比较。介绍了几个采用单层柱面网壳结构作为屋面结构的工程实例及其采用拱肋加强后的实际效率。理论分析结果及工程应用表明,在拱结构的帮助下,柱面单层拱支网壳结构的静力性能得到了明显的改善。

Investigation on Static Behaviors of Arch-supported Single-layer Reticulated Cylindrical Shells

Based on the structural features of reticulated shells and arch structures,arch-supported reticulated shell structures are developed as a new large-span space hybrid structural system.In comparison with common single-layer reticulated cylindrical shells,static behaviors,especially structural limit load-carrying capacities and sensitivity to initial geometrical imperfections,of the arch-supported single-layer reticulated cylindrical shells are investigated considering different rise to span ratios and the number of arches used as ribs.Several practical projects with arch-supported single-layer reticulated cylindrical shells as roofs are introduced to prove the efficiency of this hybrid structual system in practice.The results show that,with the anticipation of arch structures,the static behaviors of the arch-supported single-layer reticulated cylindrical shells are improved obviously.