摘要
基于新型夹具式输电塔主材加固技术,提出了一种塔脚处加固材连接新方法,可有效避免对原塔脚连接板的二次损伤,简化了施工过程。通过对2组共6个足尺试件进行偏心受压试验,研究了加固后塔脚十字型组合构件的破坏模式、极限承载力以及应力分布规律等受力行为。研究结果表明:加固后塔脚的破坏模式为局部屈曲,其位于组合构件塔脚以外的原材上;与单角钢构件相比,组合构件的极限承载力提高幅度约46%;试验过程中,主材截面应变发展迅速,加固材截面应变发展较缓慢且应变较小,基本处于弹性阶段。
Based on the innovative reinforced technology for main members of transmission towers,a new connecting method of reinforced members at the tower foot is proposed,which can effectively avoid secondary damage to the original connection plate of main members at the tower foot,and the construction process can also be simplified.An experimental study on the eccentric compression behavior of the reinforced steel tower foot containing 2 groups of 6 full-scale specimens is conducted,and the failure mode,ultimate bearing capacity and stress distribution law of the reinforced tower foot are analyzed.The research results show that the local buckling of reinforced members are found on the main member other than the tower foot;compared with the original member,the ultimate bearing capacity of the reinforced members is increased about 46%;and the strain of the main material section develops rapidly during the experiment,while that of the reinforced material section develops slowly and is relatively small,and basically remains in the elastic stage.
作者
张小民
谭蓉
赵文硕
梁刚
ZHANG Xiaomin;TAN Rong;ZHAO Wenshuo;LIANG Gang(Economic and Technological Research Institute,State Grid Shaanxi Electric Power Co.,Ltd.,Xi’an 710065,Shaanxi,China;China Energy Construction Group Shaanxi Electric Power Design Institute Co.,Ltd.,Xi’an 710054,Shaanxi,China;School of Electrical Engineering and Electronic Information,Xihua University,Chengdu 610000,Sichuan,China;National Key Laboratory of Ecological Water Conservancy in Northwest Arid Areas,Xi’an 710048,Shaanxi,China;School of Civil and Architectural Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China)
出处
《电网与清洁能源》
CSCD
北大核心
2024年第7期62-70,共9页
Power System and Clean Energy
基金
中国博士后科学基金项目(2022M712562)
陕西省自然科学基础研究计划项目(2023-JC-YB-309)。
关键词
输电塔
新型夹具
抗风加固
塔脚连接
受压性能
transmission towers
innovative clamp element
wind-resistant reinforcement
tower foot connection
compression performance
