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桁架式檩条由于自身刚度大、承载力高、施工方便成为大柱距空间结构的首选形式之一,已被国内外广泛应用,但我国现行规范尚无成熟而统一的关于桁架式檩条结构体系的设计方法和标准,在某些情况下可能偏于不安全,尤其是对跨度较大的桁架式檩条更甚。针对跨度为6,12,18m的桁架式檩条,通过对影响其整体受力性能的关键参数进行分析,并结合算例验证提出满足工程设计使用的桁架式檩条设计方法和构造要求,可为相关技术标准的完善和修订提供依据。
Due to its high rigidity, high bearing capacity and convenient construction, the truss purlin has become one of the preferred forms of space structure with large column spacing and has been widely used at home and abroad. However, there is no mature and unified truss-type purlin structure in our country’s existing norms Design methods and standards may in some cases be unsafe, especially for large-span truss purlins. According to the analysis of the key parameters that affect the overall force performance of the truss-type purlins with the span of 6, 12 and 18m, the design and construction requirements of the truss-type purlins that meet the engineering design requirements are verified by the examples and can be correlated Technical standards to improve and revise provide basis.