Influence of turbulent transverse space correlation on wind-induced responses of long cantilever transmission towers
LOU Wen-juan1, DUAN Zhi-yong1, JIN Xiao-hua2, WANG Zhen-hua2, XIA Liang1
1. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China;2. Electric Power Design Institute of Guangdong Province, Guangzhou, 510663, China
Abstract：Taking a 220kV long cantilever transmission tower as the research object, this paper simulated the dynamic wind velocity by WAWS considering the effects of turbulent transverse space correlation (TTSC). Based on the quasi-steady assumption, a numerical analysis in time domain was performed to obtain the time history of wind-induced responses of the structure and the elemental stress responses of the tower. The results show that the existence of TTSC induces significant angle, and arouses obvious torsional vibration of the tower. Stresses in diagonal members on the top of the tower also increase significantly due to TTSC. However, as along-wind fluctuating wind load reduces because of TTSC, dynamic response factor of the whole tower, especially the tower body, decreases dramatically. Therefore, the influence of TTSC on wind-induced responses should be taken into consideration in the design of transmission tower.
2014, Vol. 33 
