【摘要】 在现阶段的输电塔线体系抗震设计计算中均不考虑导线对塔的影响,然而大量的研究表明,按照现行《电力设施抗震设施规范》设计的高压输电塔线体系在强震作用下是偏于不安全的。根据5个实际工程,分别建立了高压输电塔线体系的三维有限元模型,并且考虑导线的几何非线性,以模拟两者间振动耦联效应的模型,进而验证输电塔-线耦联体系的简化抗震计算方法。分析结果表明,在纵向振动下,塔线耦联体系有限元模型结果与简化方法计算结果吻合得比较好,最大平均误差在5%以内;在侧向振动下,塔线耦联体系有限元模型结果与简化方法计算结果相差稍大,但最大平均误差也仅约为8%,由于某个输电塔共振引起的,这样的误差在实际工程中是完全可以接受的。最后,这些结果可供编制有关输电塔体系的设计规范提供参考。更多还原

【Abstract】 Now the aseismic calculation of a transmission tower system takes no account of effect of line,a lot of studies show that the limited span of transmission lines should be considered to be important in the seismic response of high voltage transimission tower.According to five real projects,three-dimensional finite element models of high voltage transmission tower-line systems are established respectively considering the geometric nonlinearity of transmission lines to simulate tower and lines coupled vibration effect and check the simplified aseismic calculation method presented by the authors for coupled systems of transmission tower-line.The results show that the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation agree very well during longitudinal vibration,the maximum average error is within 5%;the results of the finite element models of high-voltage transmission tower-line systems and those from the simplified aseismic computation have a little difference during lateral vibration,but the maximum average error is only 8%,this error could be acceptable in practical engineering.At the end,these conclusions can be for reference to design transmission tower-line systems.更多还原