环形加劲肋对大直径相贯钢管节点承载力与失效模式影响研究  

STUDY ON EFFECTS OF STIFFENING RINGS ON BEARING CAPACITY AND FAILURE MODES OF LARGE-DIAMETER STEEL TUBE JOINTS

作　　者：张丽娟[1] 李素超[2,3] 何西伟[1] 刘正伟[1] 王志远 ZHANG Lijuan;LI Suchao;HE Xiwei;LIU Zhengwei;WANG Zhiyuan(Shandong Electric Power Engineering Consulting Institute Corp.,Ltd.,Jinan 250100,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Department of Civil Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250100 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]哈尔滨工业大学(威海)土木工程系,山东威海264209

出　　处：《工业建筑》2021年第3期104-109,共6页Industrial Construction

基　　金：国家重点研发计划项目(2018YFC0809400)。

摘　　要：对带或不带环形加劲肋的特高压输电塔横担与塔身连接节点缩尺模型进行承载力试验研究,分析环形加劲肋对该类节点屈服承载力和极限承载力的影响;通过有限元建模分析,研究环形加劲肋对大直径相贯钢管节点承载力的贡献和作用机理,及其对节点失效模式的影响规律。研究结果表明:环形加劲肋将横担与塔身连接节点的受压屈服承载力提升30%以上,有效改善了主管管壁和节点板的受力状态,关键区域应力分布及失效模式有限元结果与试验结果吻合良好,可有益于钢管输电塔的设计分析。Based on a scaled model test,the bearing capacity of the joint at the intersection of the tower and cross arm with or without stiffening rings was studied.Combined with finite element analysis(FEA),the contributions of stiffening rings was to joint bearing capacity were analyzed,at the same time,the corresponding mechanisms,effects and failure modes also were analyzed.The results showed that the stiffening rings could increase the compression yield bearing capacity(side pipe)of joints more than 30%,and it could also improve the stress distribution in the tubular walls of main tubes and joint plates.In addition,the FEA results agreed well with the test results,not only on the bearing capacity but also the failure mode,which was helpful for the design and optimization of steel tube transmission towers.

关 键 词：特高压钢管输电塔 环形加劲肋 横担与塔身连接节点 承载力 试验研究 有限元模拟 

分 类 号：TU392.3[建筑科学—结构工程] TM75[电气工程—电力系统及自动化]