中文摘要：

为了分析多点输入下大跨越输电单塔和塔线体系结构响应的差异，采用时程分析法系统地分析了多点输入下其地震响应，从节点最大位移、结构最大扭转角、杆件最大轴力和基底剪力等方面找出了2种结构体系地震响应的差异．通过分析可知，单塔和塔线体系结构响应存在较大的差异，且其差异与其所处的位置有关，并且与视波速的变化有关．因此对于大跨输电塔结构，应该考虑塔和线的耦合作用，在进行抗震分析建模时应采用塔线体系模型，否则得出的结论将偏于保守或偏于危险．

英文摘要：

The seismic response of long crossing transmission single tower and tower-line system were systematically studied to find the difference between single tower and tower-line system under multiple support excitation by time history analysis method. The response difference between the single tower and tower-line system was investigated through the max node displacement, torsion, axial force and the base shear force. The results show that the seismic response difference of the single tower and tower-line system is significant, and the difference is relative to the nodes location and apparent wave velocity. So for long crossing transmission tower the the coupling of the tower and line should be considered when it is modeled for seismic analysis under multiple support excitation, otherwise those results will be over-safety or over-dangerous.