直线塔与转角塔抵抗边坡变形作用能力及特性对比分析  

Comparative Analysis on the Ability and Characteristics of Linear Tower and Corner Tower to Resist Slope Deformation

作　　者：毛强[1] 王彦海[2] 周全[1] 呙锴 MAO Qiang;WANG Yanhai;ZHOU Quan;GUO Kai(Maintenance and Test Center,CSG EHV Power Transmission Company,Guangzhou,Guangdong 510663,China;College of Electrical Engineering&Renewable Energy,China Three Gorges University,Yichang,Hubei 443002,China)

机构地区：[1]中国南方电网超高压输电公司检修试验中心,广东广州510663 [2]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《广东电力》2022年第4期103-110,共8页Guangdong Electric Power

摘　　要：输电线路走廊多位于山地、丘陵等滑坡灾害频发地区,对滑坡作用下直线塔、转角塔的抗变形能力进行比较分析,并根据差异结果采取相应的加固防护策略,对于确保输电线路的安全运行具有重要意义。用ANSYS软件建立直线塔和转角塔的有限元模型,通过分析滑坡灾害导致的边坡变形对输电铁塔塔基的影响,确定铁塔仿真分析的具体工况组合,并考虑铁塔杆件受力的二阶效应,对其进行非线性分析,研究2类输电铁塔抵抗边坡变形能力的差异。结果表明:当2类输电铁塔的塔基因为边坡变形而发生位移时,塔基沿着铁塔根开减小方向的位移对铁塔安全性的影响更大,且铁塔承受双腿变形的能力大于其承受单腿变形的能力,并大于其承受三腿变形的能力,塔基承受水平位移的能力明显大于其承受沉降变形的能力。转角塔的安全性明显大于直线塔,且极端工况下二者的差距更为明显。Transmission corridors are mostly located in mountainous and hilly areas where landslides occur frequently.It is of great significance to make a comparative analysis on the anti-deformation ability of linear tower and corner tower under the action of landslides,and take corresponding reinforcement strategies according to the difference results,to ensure the safe operation of the line.In this paper,the finite element models of corner tower and linear tower are established with ANSYS.By analyzing the influence of slope deformation caused by landslide on the legs of transmission tower,the specific combination of working conditions of tower simulation analysis is determined,and considering the second-order effect of steel tower element,the nonlinear analysis is carried out to study the difference of slope deformation resistance ability of two types of transmission tower.The results show that when two types of transmission tower legs because of slope deformation and displacement occurs,the displacement of the tower legs in the decreasing direction along the heel of the tower has a greater impact on the safety of the tower,and the capacity of the tower legs to bear the deformation of two legs is greater than that of the tower legs to bear the deformation of one leg,and is greater than that of the tower legs to bear the deformation of three legs,and the capacity of the tower legs to bear the horizontal displacement is obviously greater than that of the tower legs to bear the deformation of settlement.The safety of the corner tower is obviously higher than that of the straight tower,and the difference between the two is more obvious under extreme conditions.

关 键 词：直线塔 转角塔 滑坡 抗变形能力 二阶效应 

分 类 号：TM753[电气工程—电力系统及自动化]