外层腐蚀对输电线路架空地线承载力的影响  

Effects of External Corrosion on Force-bearing Capacity of Ground Wires

作　　者：邓静伟 张宇 陈波[2] 吴永祥 DENG Jing-wei;ZHANG Yu;CHEN Bo;WU Yong-xiang(Electric Power Research Institute of Jiangxi Power Grid Co Ltd,Nanehang 330096,2.Hubei Key Laboratory of Roadway Bridge and Structural Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,江西南昌330096 [2]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070

出　　处：《土木工程与管理学报》2018年第5期77-81,共5页Journal of Civil Engineering and Management

基　　金：国网江西省电力有限公司科技项目(521820160019);国家自然科学基金(51678463);住建部科技计划项目(2017-K5-003)

摘　　要：本文研究了自重荷载作用下腐蚀输电线路架空地线的承载力特性问题。首先基于非线性有限元理论建立了架空地线的分析模型,随后建立了腐蚀地线的非线性承载力分析方法,建立了腐蚀地线非线性迭代收敛准则。以我国南方某实际输电线路的地线为背景,研究了自重作用下腐蚀架空地线的承载力特性。进一步通过参数研究分析了不同结构参数和腐蚀参数对其承载力特性的影响。本文研究表明:地线参数和腐蚀程度对其承载力具有较为显著的影响,弧垂和档距对腐蚀地线的应力影响很大。地线应力随着弧垂的增大而迅速减小,随着档距的增加而迅速增加。The force bear-capacity of external ground wires with corrosion is actively investigated in this study. The analytical approach for ground wires are first constructed based on nonlinear finite element methods. Then,the analytical method for force bear-capacity of ground wires with corrosion are proposed. The nonlinear iterative algorithm for corrosive ground wires is presented. A real transmission tower-line system constructed in southern China is taken as an example to examine the force-bearing capacity of ground wires subjected to corrosion. Furthermore,a parametric study is conducted to investigate the effects of various wire parameters and corrosive parameters. The results indicate that wire parameters and corrosive content have substantial influence on the force-bearing capacity and the effects of the span and sag of ground wires are obvious. The stress of ground wires quickly reduces with the increasing wire sag and increases with increasing wire span.

关 键 词：腐蚀 输电地线 自重荷载 非线性有限元 承载力 

分 类 号：TM752[电气工程—电力系统及自动化]