高压输电塔线体系的地震响应研究

摘要

高压输电塔的塔线耦合作用显著,抗震分析时需采用三维有限元方法.本文以2E2-SZ2型220kV输电塔为例建立ANSYS三维有限元模型.通过模态分析,得到单塔和塔线体系的振动特征.在横向地震荷载作用下,对输电塔位移、基底反力及主材内力计算分析,讨论了地震作用对输电塔线体系的影响,提出一些有益结论.%The coupling effect of tower and line on the high-voltage transmission tower is prominent,3D finite -element method is needed for seismic analysis. A 3D finite-element model was build based on the 220kV 2E2-SZ2 transmission tower by the software of ANSYS in this paper. Vibration characteristics of single tower and tower-line system obtained through modal analysis. The displacements of tower, the foundation reaction and the internal force of main member are calculated in lateral seismic loads. In addition, this paper discusses seismic load effects on the transmission tower-line system and some useful results are derived.