建筑钢结构进展2025，Vol.27Issue(11)：88-100,109,14.DOI:10.13969/j.jzgjgjz.20241028003
输电塔底座板式对接节点主材角钢受压稳定承载力研究
Study on Stability Bearing Capacity of Main Material Angle Steel of Plate Butt Joints at the Base of Transmission Towers Under Compression
摘要
Abstract
In the whole section assembled angle steel tower system,the main material angle steel as the main load-bearing components are often connected through interrupted joints.The mechanical properties of the angle steel have a significant impact on the whole tower.However,the relevant codes have not provided corresponding calculation method for the stability bearing capacity of the interrupted main material.Taking the angle steel of the base plate butt joints as the research object,the stability bearing capacity and deformation behavior of the angle steel of the butt joints and the continuous joints under the same constraint conditions were compared through the axial compression test on full-scale specimens.Subsequently,ANSYS finite element software was used to establish a finite element model of the main material angle steel for butt joints under axial compression considering the transverse supporting effects.The mechanical properties of the angle steel subjected to axial compression were investigated in terms of slenderness ratio,cross-section size,base plate thickness,boot plate height and base plate diameter.The parametric analysis was carried out on the width-to-thickness ratio,slenderness ratio,and base plate thickness,and the main points of the design of butt joints were summarized based on the results of the finite element simulation.The results show that when subjected to axial compression,the deformation behavior and stability bearing capacity of the continuous main material differ from those of the main material of the butt joints.The stresses of the main angle steel using the butt joints are mainly distributed in the main angle steel and the bottom plate.The diameter of the bottom plate and the height of the boot plate have a small influence on the stability capacity of the main material,while the thickness of the bottom plate,the slenderness ratio,and the width-to-thickness ratio will significantly affect the stability capacity of the member,and the thickness of the bottom plate and the slenderness ratio will change the buckling modes.The setting of butt joints can obviously improve the stability bearing capacity of the main material,and with the increasing size of the cross-section,it is necessary to appropriately thicken the base plate in order to prevent the stability bearing capacity from decreasing due to insufficient thickness of the base plate.关键词
输电塔/角钢轴压试验/对接节点/稳定承载力/稳定系数Key words
transmission tower/axial compression test of angle steel/butt joints/stability bearing capacity/stability coefficient分类
土木建筑引用本文复制引用
刘志祥,刘军,靳幸福,张金锋,钱程,吴磊,谢咏宏,刘红军..输电塔底座板式对接节点主材角钢受压稳定承载力研究[J].建筑钢结构进展,2025,27(11):88-100,109,14.基金项目
国网安徽省电力有限公司科技项目(B31209230004) （B31209230004）
