摘要
研究了侧向横风作用下角钢输电塔的动力响应问题,以某大型角钢输电塔为工程背景,基于空间梁单元建立了输电塔的动力分析模型。在此基础上模拟了结构的风荷载时程,并对该输电塔在侧向横风作用下的动力响应进行了分析研究。研究表明:在横向侧风作用下输电塔将同时产生侧向和纵向的风致振动,其中侧向振动峰值要明显大于纵向振动峰值,部分主材杆件的峰值内力已经超过了材料的屈服强度。因此,在角钢输电塔的设计建造过程中,应当充分考虑侧向横风的影响。
The dynamic responses of a transmission tower with angle section members under lateral wind loadings are actively investigated in this study. A real large scale transmission tower is taken as an example to establish the dynamic analytical model by using three dimensional beam elements. The wind loadings in the lateral direction,which are acted on the transmission tower,are simulated to investigate the structural dynamic responses. The observations indicate that the dynamic responses in both the lateral and longitudinal directions are observed if the tower is subjected to lateral wind loadings. The peak wind induced responses in the lateral direction are much larger than those in the longitudinal direction. In addition,the peak stresses of some major members are larger than the yielding strength of the steel material. Therefore,the effects of the lateral wind loadings should be taken into consideration in the design and construction of the transmission tower.
出处
《南方能源建设》
2015年第1期88-91,共3页
Southern Energy Construction
基金
中央高校基本科研业务费专项资金资助(2013-11-15)
关键词
输电塔
输电系统
能源
电力系统
transmission tower
lateral wind loading
dynamic response
peak displacement
