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矩形桁架节点区域容易出现主管管壁的局部屈曲与撕裂,采用槽钢对方钢管K型间隙相贯节点进行加强。采用ABAQUS有限元软件建立了21个有限元模型,对比了加槽钢与未加槽钢模型的计算结果,同时考察了支、主管宽度比,槽钢加强厚度与主管的厚度比,槽钢外延长度对节点承载能力的影响。有限元数值分析结果表明:选择适当尺寸的槽钢加强能够有效地控制主管区域内主管表面塑性失效以及主管侧面的压坏和局部屈曲的发生,同时增强节点的刚度与承载力。
The local buckling and tearing of the main pipe wall tend to occur in the area of the rectangular truss node, and the channel K-type interspaces intersect with each other. 21 finite element models were established by using ABAQUS finite element software. The calculation results of channel plus and without channel were compared. The ratio of branch to tube width, the ratio of channel thickness to channel thickness, channel extension Effect of length on node carrying capacity. The results of finite element analysis show that the selection of the appropriate size of channel reinforcement can effectively control the main surface plastic failure and the buckling and local buckling on the side of the main pipe while enhancing the stiffness and bearing capacity of the joints.