天津商业大学新建体育馆屋盖环桁架拱支单层网壳结构分析与设计

Analysis and design of arch-supported single-layer lattice shell for the roof structure of the new gymnasium of Tianjin University of Commerce

天津商业大学新建体育馆屋盖采用环桁架拱支单层网壳结构体系。结合体育馆屋盖建筑造型,进行了环桁架、拱桁架及单层网壳等的结构布置;依据相关规范考虑各种荷载效应及荷载组合,进行了环桁架拱支单层网壳静、动力性能的分析和设计;对环桁架拱支单层网壳进行了非线性稳定性分析,通过跟踪缺陷结构非线性平衡路径,确定了结构的稳定承载力;最后详细分析了支座水平刚度对环桁架拱支单层网壳结构性能的影响,并建立结构整体模型,分析了下部结构对屋盖钢结构受力性能的影响。分析结果表明,环桁架拱支单层网壳具有很好的承载能力和变形性能,能安全、可靠地完成使用功能。

Arch-supported single-layer lattice shell was adopted as the roof structure of the new gymnasium of Tianjin University of Commerce. Loop trusses,arch trusses and single-layer lattice shell were set up in accordance with the architect design. Static analysis and dynamic analysis and design of the arch-supported single-layer lattice shell were conducted considering different loads and load combinations specified by related codes. Overall stability of the archsupported single-layer lattice shell was studied by nonlinear finite element analysis. The stability of the structure was determined by tracking the nonlinear equilibrium path of the defect structure. The influence of the lateral stiffness of the bearing on the behaviour of the arch-supported single-layer lattice shell was also analyzed in detail. The influence of substructure on the mechanical properties of the roof structure was analyzed by the whole structure model. It is shown that the arch-supported single-layer lattice shell has excellent bearing capacity and deformation behaviour and is safe and reliable to be used.