摘要
高压输电线路是一种风敏感结构体系,风灾是严重威胁输电线路安全运行的自然灾害之一。为保证输电线路铁塔整体结构强度,铁塔设计时,一般按一定间距加入横隔面,横隔面的设计直接影响到铁塔整体抗风性能。本文以湖北省内早年使用的一种无横隔面220kV输电铁塔为例,研究了原始无隔面结构和增加隔面补强结构的模态和极限风载条件下的内力和变形。研究结果表明:对旧型输电铁塔增加横隔面补强方案一定程度上提升了铁塔结构强度,但在模态方面应进一步改良。
High-voltage transmission lines are the wind-sensitive structural system,and wind damage is one of the serious natural disasters which threaten the safety operation of transmission lines.In order to ensure the overall structural strength of transmission line tower,the plan bracings are added in a certain interval in the tower design,which has important affect to the overall wind resistance capacity of tower.This paper takes the no plan bracing tower used in Hubei province early as an example,the internal forces and deformation are studied without and with the plan bracings in the modality and extreme wind load conditions.The results show that the towers added the reinforced plan bracings increase the structural strength to a certain extent,but the modality should be improved.
出处
《湖北电力》
2014年第10期40-43,共4页
Hubei Electric Power
关键词
输电塔
抗风设计
横隔面
模态分析
变形
ANSYS
有限元
tower
wind resistance
plan bracing
modality analysis
deformation
ANSYS
finite element
