Ultra high voltage (UHV) transmission tower-line coupling system consists of transmission lines (conductors and ground wires) supported by a series of lattice towers. However, in the current seismic design code, the transmission lines are just simplified as additional mass while the effect of nonlinear vibration of transmission lines on the seismic responses of transmission towers is not taken into consideration. To analyze the influence of the ignorance of the coupling effect between towers and transmission lines, two types of model structures, i.e. tower-line coupling system model and single tower model with lumped masses, should be tested for comparison. But normal reduced-scale model design method cannot complete the shaking table test by a uniform geometric similarity ratio for the coupling system in the limit of table size, hence this paper proposed to rescale the geometric similarity ratio for the model design of transmission lines and meanwhile satisfied the requirement in dynamic properties similitude and inertia force similitude separately, which successfully solved the problem that the span of transmission lines in the test was too large to fit within the shaking table. This method may offer reference to experimental studies for other large-span structures and the experimental results show that the nonlinear vibration of transmission lines plays a role as seismic reduction by dissipating some seismic energy to towers under earthquake.

超高压（UHV）输电塔线耦合系统由由一系列格子塔支撑的输电线（导体和地线）组成。然而，在当前的抗震设计规范中，传输线只是简化为附加质量，而没有考虑传输线的非线性振动对传输塔地震响应的影响。为了分析塔与输电线路之间耦合效应的无知的影响，应测试两种模型结构，即塔线耦合系统模型和集中质量的单塔模型，以进行比较。但是普通的缩小模型设计方法无法在工作台尺寸的限制下通过统一的几何相似比完成耦合系统的振动台测试，因此，本文提出重新设计输电线路模型设计的几何相似比，同时满足动态特性相似性和惯性力相似性的要求，成功解决了输电线路跨度过大的问题。放在摇床上。该方法可为其他大跨度结构的试验研究提供参考，实验结果表明，传输线的非线性振动通过将一些地震能量耗散到地震作用下的塔架上，起到减震作用。成功解决了测试中传输线的跨度太大而无法容纳在振动台内的问题。该方法可为其他大跨度结构的试验研究提供参考，实验结果表明，传输线的非线性振动通过将一些地震能量耗散到地震作用下的塔架上，起到减震作用。成功解决了测试中传输线的跨度太大而无法容纳在振动台内的问题。该方法可为其他大跨度结构的试验研究提供参考，实验结果表明，传输线的非线性振动通过将一些地震能量耗散到地震作用下的塔架上，起到减震作用。