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角钢桁架构件的安全储备主要与杆件截面的安全储备和杆件与节点板连接焊缝的安全储备有关。在角钢桁架构件设计中,其安全储备的多少首先取决于杆件截面大小,在随后的杆件与节点板连接焊缝设计中,应注意使连接焊缝的安全储备大于杆件截面的安全储备,才不至于降低整个构件的安全储备。本文结合某标准设计中一榀跨度18 m、荷载等级为4的梯形角钢屋架对此进行说明,可供从事工程设计和施工的人士参考。
The safety stock of the angle truss members is mainly related to the safety reserve of the bar section and the safety reserve of the bar and joint plate joint welds. In the design of the angle truss member, the safety reserve depends on the cross-section size of the rod firstly. In the subsequent joint design of the rod and nodal plate joints, the safety reserve of the joint weld should be greater than the safety reserve of the cross-section of the rod , It will not reduce the safety of the entire component reserves. In this paper, a standard design of a span of 18 m, load rating of 4 trapezoidal angle steel truss to illustrate this, for engineering design and construction of the reference.