| 极端风力条件下铁塔拉线组件的受力分析 |
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| 引用本文： | 李颖,季献武,肖嵘.极端风力条件下铁塔拉线组件的受力分析[J].上海电力,2010(Z1). |
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| 作者姓名： | 李颖 季献武 肖嵘 |
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| 作者单位： | 华东电力试验研究院有限公司; |
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| 摘 要： | 2009年6月14日,受强对流天气影响,江苏某500kV线路发生84～87号铁塔倾倒,88号塔头严重受损,89号挂线支架严重受损。事件的起因是86号塔4号拉线组件在飑风作用下脱离了拉线基础连接件,造成铁塔拉线间拉力不均,铁塔失稳后倾倒。通过对失效的4号拉线地锚环在极端风力条件下铁塔拉线组件的受力分析,指出单次极端风力不足以造成拉线组件受损,但长期的交变荷载会造成金属疲劳损伤,并在极端风力情况下突发失效。建议对该线路金属部件加强原材料质量检验和线路建设用材监督,开展寿命评估工作,以免类似事故发生。
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| 关 键 词： | 铁塔 拉线 极端风力 受力分析 |
Force analysis of cable stayed iron tower parts under extremely wind condition |
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| Authors: | LI Ying JI Xian-wu XIAO Rong |
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| Affiliation: | LI Ying,JI Xian-wu,XIAO Rong(East China Electric Power Test & Research Institute Co.,Ltd.,Shanghai 200437,China) |
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| Abstract: | On June 14,2009,caused by the strong convective weather,No.84~ No.87 transmission towers of one 500kV transmission line in Jiangsu Province dumped,and the tower head of No.88 tower together with the line bracket of No.89 tower was severely damaged.Guyed components on No.4 line of No.86 tower broke away from the basic line connector under the effect of the hurricane,which leaded uneven tension between tower lines,and further leaded the tower to dump after the tower instability.By the tension analysis of the ... |
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| Keywords: | Iron tower Cable stayed iron tower parts Extremely wind condition Force analysis |
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