(1 河南大学钢与空间结构研究所， 开封 475004； 2 河南天元网架工程有限公司， 开封 475004)

［摘要］以某大跨度干煤棚网壳结构为研究对象，在柱面双层网壳结构方案的基础上，提出采用折柱面双层网壳结构的优化方案，通过建立多个计算模型，分析对比不同折线坡度、网壳厚度对结构承载力和用钢量的影响，确定最优的结构几何参数。研究结果表明，在相同用钢量的情况下，折线坡度为9.16%、网壳厚度为4.4m左右时，折柱面双层网壳结构极限承载力比柱面双层网壳结构提升27.3%。

［关键词］大跨度干煤棚； 折柱面双层网壳结构； 折线坡度； 网壳厚度； 优化分析； 极限承载力

中图分类号：TU391文献标识码：A文章编号：1002-848X(2019)02-0012-04

Study on design and optimization of a large-span dry-coal shed reticulated shell structure

Zhu Liming1, Du Wenfeng1, Wang Longxuan1, He Pengfei1, Liu Zhijian2, Han Fang2

(1 Institute of Steel ＆ Space Structure， Henan University， Kaifeng 475004， China;2 Henan Tianyuan Space Frame Engineering Co．， Ltd．， Kaifeng 475004，  China)

Abstract:The design and optimization scheme of a large-span dry-coal shed reticulated shell structure were studied. On the basis of the structural scheme of cylindrical double-layer reticulated shell structure, the optimization scheme of the folding cylindrical double-layer reticulated shell structure was proposed. Through the analysis of a plurality of calculation models, the optimal geometric parameters were obtained after researching and comparing the influences of different slopes of folding lines and reticulated shell thickness on the structural bearing capacity and the amount of steel. The research results show that in the case of the same amount of steel, the ultimate bearing capacity of the folding cylindrical double-layer reticulated shell structure whose folding line slope is 9.16% and the shell thickness is about 4.4m can be increased 27.3% compared with the double-layer cylindrical reticulated shell structure.

Keywords:large-span dry-coal shed; folding cylindrical double-layer reticulated shell structure; folding line slope; shell thickness; optimal analysis; ultimate bearing capacity

*国家自然科学基金资助项目（U1704141）。

通讯作者：杜文风，博士，教授，Email:dwf@henu.edu.cn。