【作者】 杨靖波； 李正； 张强； 黄璜； 黄廷政； 李清华；

【Author】 1Yang Jing-bo, 1Li Zheng, 2Zhang-Qiang, 1Huang Huang, 1Huang Ting-zheng, 1Li Qing-hua (1Beijing Electric Power Construction Research Institute of SGCC, Beijing, 100055) (2 State Grid Corporation of China, Beijing, 100035)

【机构】 国网北京电力建设研究院； 国家电网公司；

【摘要】 本文通过酒杯、鼓型以及干字三类典型塔型在不同覆冰厚度及工况组合下的受力校核,对2008年输电线路铁塔遭受冰灾倒塌的原因进行了深入分析,计算结果与铁塔现场实际破坏情况一致,揭示了铁塔覆冰倒塔破坏的最主要原因在于导线覆冰过载及产生过大的纵向不平衡张力。文中最后给出提高线路抗覆冰能力的建议及措施。更多还原

【Abstract】 In this paper, the reason, snow and ice attacked transmission steel tower to damage and collapse in the year 2008, are explained according to bearing capability analysis of three type towers working with different thickness of coated ice. The calculation results of tower damaged position and situation are about as the same as the tower collapsed on-site. That show tower damaged and collapsed is because the thickness of coated ice on conductor exceeds that of the former design, and the coated ice produces over large unbalanced longitudinal tension on the tower. In addition, some suggests to promote the capability of resistant ice of transmission line are given from the point of design.更多还原