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特高压输电线路工程中大量采用钢管塔,特高压钢管塔斜材、隔材与主材连接大多采用插板型式,其连接表现出既不同于刚接又不同于铰接的力学特性,特高压钢管塔节点属于半刚性节点。本文采用一种刚度可调的半刚性节点单元模拟特高压钢管塔节点连接,建立了考虑节点半刚性的特高压钢管塔有限元模型,并分析了节点半刚性对特高压钢管塔静力特性的影响。研究发现:节点半刚性对特高压钢管塔导地线挂点位移影响最大可达65.990%、对杆件轴力影响最大可达-102.256%;这表明对特高压钢管塔内力计算时应考虑节点的半刚性对设计结果的影响。
In the UHV transmission line project, a large number of steel pipe towers are used, particularly for UHV steel pipe towers. The connection between the bulk materials and the main materials mostly adopts the flapper type. The connection shows the mechanical characteristics different from that of the first joint and the hinge, Tower nodes are semi-rigid nodes. In this paper, a kind of semi-rigid node unit with adjustable stiffness is used to simulate the connection of UHV steel pipe tower nodes. The finite element model of UHV steel pipe tower with semi-rigid joints is established, and the semi- influences. It is found that the semi-rigidity of the joint has the largest influence on the displacement of the grounding wire of UHV steel pipe tower by 65.990%, and the maximum impact on the axial force of the rod can reach -102.256%. This indicates that the node The effect of semi-rigidity on design results.