大跨越钢管塔复杂管板-相贯节点承载力计算方法  

Calculation Method of Bearing Capacity of Complex Pipe Plate-Intersecting Joints of Long-Span Steel Pipe Tower

作　　者：孟宪乔 张树林 郑治祥 李正良[2] 刘红军[2] MENG Xianqiao;ZHANG Shulin;ZHENG Zhixiang;LI Zhengliang;LIU Hongjun*(China Energy Engineering Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230601,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]中国能源建设集团安徽省电力设计院有限公司,合肥230601 [2]重庆大学土木工程学院,重庆400045

出　　处：《建筑钢结构进展》2024年第12期80-94,共15页Progress in Steel Building Structures

基　　金：国家自然科学基金(51508054)。

摘　　要：以白鹤滩—浙江±800 kV特高压直流输电线路安徽池州段长江大跨越钢管输电塔为工程背景,对输电塔塔头下横担与主管连接的复杂管板-相贯节点的受力性能进行了研究。建立了节点有限元模型并对模型的合理性进行了对比验证,进一步地,对节点关键性几何尺寸进行参数化分析,研究其对节点承载力的影响。结果表明,节点水平支管和斜管承载力的最主要影响因素分别为水平支管几何尺寸和斜支管连接节点板厚度。在此基础上,采用节点逐层拆分方法进行了承载力推导并给出了节点承载力建议计算公式,公式结果与节点实际承载力的误差在12%以内,可为该节点的实际工程应用提供参考。Taking the Yangtze River large-span steel pipe transmission tower of the Baihetan-Zhejiang±800 kV UHVDC transmission line in the Chizhou section of Anhui Province as the engineering background,this study investigated the mechanical performance of complex pipe plate-intersecting joints connecting the lower cross-arm and the main pipe at the top of the transmission tower.A finite element model of the joint was established,and its validity was verified through comparative analysis.Furthermore,parametric analysis of the key geometric dimensions of the joint was conducted to examine their impact on the joint’s bearing capacity.The results show that the primary factors influencing the bearing capacity of the horizontal branch pipe and inclined pipes are the geometric dimensions of the horizontal branch pipe and the thickness of the connection plate of the inclined branch pipe,respectively.Based on this,a layer-by-layer decomposition method is employed to derive the joint’s bearing capacity,and a recommended formula for its calculation is provided.The calculated results show an error of within 12%when compared to the actual bearing capacity,making the formula a reliable reference for engineering applications.

关 键 词：大跨越钢管塔 管板-相贯节点 极限承载力 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程]