摘要
目前许多有关输电塔在断线荷载下的响应分析,都假定多根导线同时断裂,然而大多数情况下多根导线并不是同时断裂的。针对这个问题,文中采用有限元分析方法,对导线同时断裂和不同时断裂所引起的动力响应进行了分析计算,得到了不同情况下输电塔的动力响应规律。结果表明导线断裂存在时间差时所引起的动力响应,比导线同时断裂引起的动力响应更加剧烈。然而目前使用的杆塔设计规范,只将断线荷载视为静力荷载,没有考虑断线荷载引起的动力效应,这可以为现行规范提供参考。
Nowadays, many researches on the dynamic responses of transmission tower under the effect of wire-raptured load are assumed to be that the wires would break at the same time. Nevertheless, the majority is that the wires would not break at the same time. According to this problem, the dynamic responses caused by wires breaking simultaneously and unsimuhaneously are analyzed and calculated by using FEM （Finite Element Method）, and some dynamic response laws under different conditions are obtained. The results indicate that the dynamic responses caused by wires rupturing unsi- multaneously are much larger than the responses resulted from wires rupturing at the same time. However, the Tower De- sign Code used at present just regards the wire-ruptured load as the static orie, and ignores the dynamic effects caused by wire-ruptured load, so the research results here can provide references for the Code.
出处
《水利与建筑工程学报》
2011年第6期119-122,共4页
Journal of Water Resources and Architectural Engineering
关键词
输电塔
断线荷载
动力响应
有限元
transmission tower
wire-ruptured load
dynamic response
FEM
