复沙500kV输电线路Ⅱ回拉线门型塔屈曲分析  

Buckling analysis of guyed portal steel tower for 500 kV Fusha line Ⅱ

作　　者：刘纯[1] 姜勇[2] 陈红冬[1] 胡波涛[1] 

机构地区：[1]湖南省电力试验研究院,湖南长沙410007 [2]吉林省电力勘测设计院,吉林长春130021

出　　处：《中国电力》2007年第6期45-47,共3页Electric Power

摘　　要：复沙Ⅱ回500kV输电线路ZH91拉线门型塔为新设计塔型,使用前未进行真型试验,运行中该塔失稳。应用有限单元法对该塔的不同荷载工况进行了屈曲分析。结果表明,在覆冰荷载和导线不平衡张力荷载下,该塔横担下边框主材屈服;事故后的真型试验验证了计算结果的正确性。最后对铁塔进行了改进验算,将横担下边框主材规格由80mm×6mm改为100mm×8mm时,铁塔强度满足设计要求。The ZH91 guyed portal steel tower of 500 kV Fusha line Ⅱ is a new-style tower without design verification by the real model experiment, and failed during the operation. The finite element method was carried out to investigate the buckling of the tower under the operating conditions, and the simulation results show the main members of the bottom cross arm would yielded in the case of ice load and longitudinal unbalanced tension of conductor, which was verified by the real model experiment. Finally, based on the check calculation of the reinforcement for the tower, the size of the main members should be enlarged from 80 mm×6 mm to 100 mm×8 mm.

关 键 词：500KV输电线路 拉线门型塔 屈曲分析 真型试验 

分 类 号：TM753[电气工程—电力系统及自动化]