摘要
不均匀覆冰导致直线塔两侧出现不平衡张力,铁塔受到弯矩和扭矩,是直线塔倒塔和损坏的主要原因之一。采用等线长法精确计算杆塔所受的不平衡张力,在杆塔结构设计中非常重要,可以使工程设计人员对杆塔的受力情况准确把握。既能避免不考虑悬垂串倾斜而采用过大的不平衡张力造成的浪费,也能防止采用较小的不平衡张力带来的风险,使杆塔设计更趋向于经济合理、安全可靠。
Uneven icing causes imbalanced tension on both sides of suspension tower, resulting in bending moment and torque. It is one of the main causes of suspension tower collapse and damage. It is important for structural design to use equivalent length method to accurately calculate imbalanced tension on the tower, so that designers know exact loading on tower. It not only avoids waste caused by ignoring suspension string inclination and using excessive imbalanced tension, but also eliminates risks caused by using less imbalanced tension, resulting in economically sound, safe, and reliable design.
出处
《电力建设》
2009年第5期32-34,共3页
Electric Power Construction
关键词
输电线路
不平衡张力
连续档
transmission line
imbalanced tension
calculation
