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建立了角钢塔节点三维有限元模型,对角钢塔tt型节点的极限承载力进行研究。首先讨论了角钢塔节点的破坏模式,各种破坏模式发生的条件,以及影响节点破坏模式的主要因素;为了讨论偏心作用对极限承载力的影响,将偏心受压的节点板的有限元模型结果与轴心受压节点板的有限元模型结果进行对比分析,讨论两种节点的失稳路径的差异,以及偏心对节点板破坏模式及极限承载力的影响;还对节点板进行了变参分析,主要讨论了节点板的厚度、角钢宽厚比、角钢肢端面中点沿角钢轴线方向至主材净距离等因素对节点的极限承载力的影响。
The three-dimensional finite element model of angle steel tower node was established and the ultimate bearing capacity of tt type node of angle steel tower was studied. Firstly, the failure modes of angle steel tower nodes, the conditions of various failure modes and the main factors affecting the failure modes of the joints are discussed. In order to discuss the influence of eccentricity on the ultimate bearing capacity, the finite element model results Compared with the results of finite element model of axisymmetric gusset plate, the difference of instability path of the two kinds of nodes and the influence of eccentricity on failure mode and ultimate bearing capacity of gusset plate are also discussed. , Mainly discussed the influence of the factors such as the thickness of nodal plate, the angle-width-width ratio, the mid-point of angle-end face along the angle of the steel axis and the net distance of main material on the ultimate bearing capacity of the joint.