摘要
2008年初电网冰灾破坏原因统计分析表明,500 kV输电线路铁塔受损严重,其中酒杯塔倒塔基数占倒塔总数的36.2%。为了弄清酒杯塔在覆冰荷载作用下的破坏形态,选取湖南冰灾区500 kV线路中的酒杯塔进行均匀覆冰荷载和不均匀覆冰荷载作用下的主要受力杆件的敏感度及整塔的破坏形态分析,从而确定酒杯塔覆冰荷载作用下的受力薄弱点。研究结果为我国冰灾区酒杯塔设计和加固补强提供参考依据。
The statistical analysis of ice disaster on power gird shows that 500 kV transmission line towers were damaged seriously in early 2008. The number of collapsed tower is 36.2% of the total. In order to find out the failure mode of such towers under ice load, the 500 kV transmission cuptower in Hunan disaster area is studied on the loads of uniform and non-uniform ice thickness. The mechanical sensitivity of mainly stressed members and the failure mode of cup-tower are given in this thesis. The weakest load-bearing points of cup-tower under ice load are proposed. The research results provide a reference for the cup-tower design and reinforcement in ice disaster area.
出处
《电力建设》
2009年第11期21-23,共3页
Electric Power Construction
基金
国家电网公司科技项目(AKZ3080765)
关键词
输电线路
冰灾
覆冰荷载
酒杯塔
有限元分析
transmission line
ice disaster
icing load
cup-tower
finite element analysis
