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通过对两种摆放方式(规格材立置和平置)的平行弦木桁架进行静载试验,测试其上下弦各节点挠度,分析杆件摆放方式对木桁架刚度、承载能力和破坏模式等力学性能的影响。结果表明,规格材杆件立置的平行弦木桁架具有较高的刚度和极限承载力,破坏以杆件劈裂为主;而杆件平置的木桁架破坏主要发生在齿板连接的节点处。木桁架弦杆接长对其承载能力影响显著,此处安全性能要求更高,必要时应对对接节点处进行加强处理。
Through the static load test of the parallel chord wood trusses of two kinds of display ways (vertical and horizontal installation), the deflection of each node of the upper and lower chords is tested, and the stiffness, bearing capacity and failure mode of the wooden truss are analyzed. Effect of mechanical properties. The results show that the parallel chord wood trusses with vertical bar of profile material have high rigidity and ultimate bearing capacity, and the failure is mainly of bar cleavage. The destruction of wooden truss with flat bar lies in the node of tooth plate connection Department. Wood truss chord length of the bearing capacity of its significant impact, where higher safety performance requirements, if necessary, docking nodes to be strengthened.