输电塔静力风载响应研究

Study on Static Force Wind Load Response of Transmission Tower

输电塔是输电线路的支撑体,风荷载是输电塔的主要荷载,风荷载作用下输电塔的安全性极其重要。本文对其开展研究,深入分析和探讨了输电塔在静力风载作用下的响应,发现:攻风角为0°、45°、60°、90°时,输电塔的位移与输电塔的高度呈正相关关系;攻风角为45°~60°时输电塔的位移较大;输电塔杆件承受的最大压力均大于最大拉力;攻风角为60°时的压力和拉力均最大;攻风角为0°和90°时受力面上的轴力较小,而对应面上的轴力很大;攻风角为45°和60°时一条对角线上的主材受力较大,另一条对角线上的主材受力相对较小。研究对于输电塔加固处理和指导输电塔的设计安装以避免灾害的发生均具有重要参考价值。

Transmission tower is the backbone of transmission lines. Wind load is the major load on transmission tower. The safety of transmission tower under the effect of wind load is extremely critical. In this paper, the response of transmission tower under the effect of static force wind load has been deeply studied. Our findings include: when attack wind angle is 0, 45, 60 or 90 degrees, the displacement of the transmission tower is positively correlated with the height of the transmission tower; when attack wind angle is within the range from 45 degrees to 60 degrees, the displacement of the transmission tower is the highest; the maximum pressure that the transmission tower bears is larger than the maximum tension;when attack wind angle is 60 degrees, both pressure and tension reach the maximum; when attack wind angle is 0 degrees or 90 degrees, the axial force on stress plane is small, but the axial force on corresponding plane is quite large; when attack wind angle is 45 degrees or 60 degrees, the stress on a diagonal tower body is higher than the stress on the other diagonal tower body. The research results are of critical reference value to the stabilization processing and the deployment of transmission tower.