建筑钢结构进展2025，Vol.27Issue(11)：57-65,74,10.DOI:10.13969/j.jzgjgjz.20241020001
整段拼装式输电塔对接节点承载力试验研究
Experimental Study on Bearing Capacity of Butt Joint Connection of Whole Section Assembled Transmission Tower
摘要
Abstract
This paper presents a design for angle steel towers with a structure where the top and bottom ends are completely separated,forming independent sections.These sections are connected by circular base plates,reducing the number of bolt groups at the main material joints.This design improves the existing tower assembly method,enhances assembly efficiency,and increases construction safety.Additionally,it facilitates robotic operations for tower assembly.The connection joints are crucial for ensuring the overall stability of the tower.To understand the load-bearing mechanism,failure modes,and ultimate load capacity of the connection joints,this study conducted tensile load tests on 10 full-scale joint specimens.The effects of base plate thickness,base plate diameter,hole position diameter,and bolt hole diameter on the load-displacement curves and load capacity of the joints were examined.A finite element model for the connection joint was also established to further investigate the influence of base plate dimensions,hole sizes,and material strength on the ultimate load capacity.Based on the experimental and numerical results,a load capacity calculation formula for this type of joint is proposed.The results indicate that,at the early stage of loading,the specimen's directional deformation is not significant.As the load increases,warping first occurs at the welding positions between the main material and the base plate.Continuing to load into the plastic stage,the main material bends under eccentric forces,and bolts deform under the compressive force from the bolt holes.Eventually,the base plate exhibits significant warping and irrecoverable residual deformation after unloading.The base plate thickness,material strength,base plate diameter,and hole position diameter have a significant impact on the joint's load capacity,while the bolt hole diameter has a relatively minor effect.关键词
输电线路/拼装式/对接节点/抗拉试验/承载力/有限元分析Key words
transmission line/assembly/butt joint/tensile test/bearing capacity/finite element analysis分类
动力与电气工程引用本文复制引用
陈锡祥,张金锋,罗义华,张树林,李涛,张佳伦,刘红军..整段拼装式输电塔对接节点承载力试验研究[J].建筑钢结构进展,2025,27(11):57-65,74,10.基金项目
国网安徽省电力有限公司科技项目(B31209230004) （B31209230004）
