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目前,许多有关输电塔在断线荷载作用下的响应分析,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,本文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,目前施行的杆塔设计规范,将断线荷载视为静力荷载,并未考虑断线荷载引起的动力效应,望本文内容可以为现行规范提供参考。
At present, many response analyzes of transmission towers under the action of breaking loads assume that multiple conductors break at the same time. However, in most cases, multiple conductors do not break at the same time. In response to this problem, the finite element analysis method is used in this paper to analyze and calculate the dynamic response caused by the simultaneous and non-simultaneous fracture of the wire, and the dynamic response of the transmission tower under different conditions is obtained. The results show that the dynamic response caused by the difference in wire breakage is more severe than the dynamic response caused by simultaneous wire breakage. However, the current design of the tower design, the disconnection load as a static load, did not consider the dynamic effects caused by the disconnection load, hope this article can provide reference for the current norms.