通过对2005年和2008年冰灾倒塔破坏特征统计分析,指出了杆塔覆冰过载薄弱部位.对典型事故段直线塔破坏模拟分析,得出了直线型杆塔覆冰过载构件应力变化规律,找出了杆塔覆冰过载薄弱部位分布规律,并提出了加强直线型杆塔覆冰过载薄弱部位具体设计措施.%Statistical work and analysis are carried out on damaged character in 2005's and 2008's ice disaster, weak positions with exceeding ice load were found out. variational orderliness of member stress are summed up through imitate analysis of typical accident section,and the distributed rule of weak positions are found out. detailed design suggestions on reinforcement measure of straight line towers are proposed.
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