施黎甲线74号至76号塔覆冰受损分析

Analysis on the Iced Damage of No. 74-76 Towers in Shibing-Liping 1 Transmission Line

针对在2009年冰冻灾害袭击中施黎甲线3基杆塔的受损情况，根据现场覆冰情况建立合理的不均匀覆冰模型；通过有限元软件对受损杆塔进行力学分析，寻找受损原因；根据计算结果，得出导地线纵向张力和过载覆冰对杆塔强度的影响范围；并提出了在工程中预防线路不平衡张力和过载冰的一些建议和方法。

Based on the damage of transmission towers of Shibing-Liping transmission Line in ice storms occurred in 2009, according to the actual icing conditions, the article establishs a reasonable model of the uneven ice; with the finite element software, the article does the mechanical analysis about the damaged towers, looking for the reasons of damage; according to the results, the article find out the sphere of influence about strength of tower under the effect of unbalanced tension and overload ice coating of transmission line; the article proposes some suggestions and methods about the prevention of unbalanced tension and overload ice coating in engineering.