输电塔在线路覆冰作用下的极限承载力分析  

Ultimate load-carrying capacity of transmission towers under ice accretion

作　　者：鞠彦忠[1] 薛庆莲[1] 熊心[1] 迟作为[2] 

机构地区：[1]东北电力大学建筑工程学院,吉林132012 [2]吉林供电公司,吉林132001

出　　处：《华东电力》2009年第11期1838-1841,共4页East China Electric Power

基　　金：国家自然科学基金项目(50878040);吉林省科技发展计划项目(20060506);吉林省教育厅"十一五"科学技术研究项目(200843)

摘　　要：在总结覆冰的成因、分类以及对输电线路的危害的基础上,分析了输电铁塔在线路覆冰作用下的横向荷载、纵向荷载和垂直荷载。以国家电网典型设计中5A-ZM4直线猫头塔为例,建立了桁梁混合有限元模型,在此基础上,进行了线路覆冰作用下输电塔极限承载力的计算。结果显示输电塔在线路覆冰作用下的受力性能与钢材在轴向拉力作用下的受力性能相似,也分为弹性、屈服、强化三个阶段。计算所得结论对工程实际具有一定的参考价值。The formation and classification of ice accretion,as well as its damage to transmission lines were summarized.Based on that,the lateral,longitudinal,and vertical loads of transmission towers under ice accretion were discussed in detail.Based on the 5A-ZM4 ＂cat′s head＂ tower,the finite element model was built with the consideration of beam element orientations.Consequently,the ultimate load-carrying capacity of the transmission tower under ice accretion was calculated and the results showed that the mechanic behavior of the tower was similar to that of the steel membet, which can be approximately divided into three stages： the elastic stage, the yield stage, and the hardening stage.

关 键 词：输电塔 覆冰 桁梁混合有限元模型 极限承载力 受力性能 

分 类 号：TM753[电气工程—电力系统及自动化]