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针对广东水利水电学院文体馆的折板型屋盖,采用常用的主次桁架和折板网格方案分别建模计算分析,对两种结构方案进行了比较.主次桁架方案传力路线清晰、挠度小、造型美观,但整体性差;折板网格方案整体性好、用钢量省,但局部受力较大,相应杆件截面较大,球节点会用到非常规直径.在考虑将两种方案优势互补基础上提出了一种新型的组合桁架与网格复合结构体系.对复合结构体系屋盖及主体混凝土结构进行了整体计算分析,并在此基础上利用弦支结构的概念对屋盖结构进行了优化,折板型屋盖结构的受力性能及用钢量得到明显改善.
According to the folding roof of the sports hall of Guangdong University of Water Conservancy and Hydroelectric Power, the two main structural schemes are compared by using the common primary and secondary trusses and the folding grid scheme respectively, the force transmission routes of primary and secondary truss schemes are clear, Small deflection, beautiful appearance, but the overall poor; folding grid scheme integrity is good, the amount of steel province, but the local force is larger, the corresponding rod section larger ball nodes will use an unconventional diameter.When considering the Based on the complementary advantages of the two schemes, a new type of combined truss and grid composite structure system is proposed.The overall calculation and analysis of composite structural system roof and main concrete structure are carried out, and on this basis, the concept of the chord structure The structure of the roof was optimized, and the force-bearing performance of the roof structure with folded plate and the amount of steel used were obviously improved.