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钢网架结构作为屋面支承系统,在大跨度空间结构中得到了较为广泛的应用。文中以某田径馆的屋面网架为例,探讨了大跨屋面钢网架结构的优化设计。对不同网架类型、不同支座约束条件、不同网架高度等进行了对比计算,通过综合比较用钢量、挠度、构件规格等,进行了网架的结构优化设计,使之趋于合理,经济实用;最后简要叙述了屋面檩条、马道等的设计。
As the roof support system, the steel truss structure has been widely used in the long-span space structure. In this paper, the roof truss of a track and field pavilion is taken as an example to discuss the optimal design of the long-span roof steel truss structure. Comparing the different types of truss, the constraints of different supports, the different truss heights and so on, the structural optimization design of the truss was carried out by comparing the amount of steel used, the deflection and the components’ Economical and practical; Finally, a brief description of the roof purlins, horses and other design.