老旧输电铁塔结构安全分析与加固仿真研究  

Safety Analysis and Reinforcement Simulation Research of Old Transmission Tower Structure

作　　者：郭浩[1] 章志鸿[1] 乐天达 赵强[1] 薛阳 吴海东 GUO Hao;ZHANG Zhi-hong;LE Tian-da;ZHAO Qiang;XUE Yang;WU Hai-dong(State Grid Wuxi Power Supply Company,Wuxi 214061,China;College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]国网无锡供电公司,江苏无锡214061 [2]上海电力大学自动化工程学院,上海200090

出　　处：《电工电气》2019年第5期7-11,共5页Electrotechnics Electric

基　　金：国家自然科学青年基金资助项目(51405286);上海市自然科学基金资助项目(13ZR1417800)

摘　　要：针对已有老旧输电铁塔易发生倒塔事故不能满足在负荷条件下安全工作的状况,进行了安全性风险分析,建立输电铁塔结构模型,在特定工况下对杆塔仿真应力计算,找到输电铁塔受力薄弱点。通过主材加辅助支撑补强方案和主材增大截面技术补强方案对输电铁塔进行加固补强,对加固补强后的输电铁塔模型进行仿真,研究结果表明二重加固方案比原塔应力比降幅达20.9%～53.4%,从而提升了输电铁塔整体刚度及构件强度,满足了新条件下的安全使用要求。For the existing old transmission towers are easy to cause the inverted tower accidents which can’t meet the conditions of safe operation under load conditions,this paper carried out the safety risk analysis,established the structural model of transmission towers and carried out the stress calculation of the transmission tower under specific working conditions,to find the weak point of the transmission tower.For the weak point of stress,the transmission tower was strengthened by the main material plus auxiliary support reinforcement scheme and the main material enlarged section technology reinforcement scheme.The simulation of the reinforcement transmission tower model was carried out.The results show that the double reinforcement scheme has a ratio of stress reduction of 20.9%~53.4% compared with the original transmission tower,thus improving the overall stiffness of the transmission tower and the strength of the component,which meets the requirements of safe operation under new conditions.

关 键 词：输电铁塔 安全 应力计算 加固 应力比 

分 类 号：TM753[电气工程—电力系统及自动化]