特高压输电线路塔线耦联体系非线性振动响应振动台试验研究  

Shaking table test on nonlinear vibration responses of UHV transmission tower-line coupling system

作　　者：谢强[1,2] 白杰[1] 薛松涛[1] 秦庆芝[3] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]华北电力设计院工程有限公司,北京100120

出　　处：《地震工程与工程振动》2012年第5期103-110,共8页Earthquake Engineering and Engineering Dynamics

基　　金：教育部霍英东教育基金会优选课题(114021);国家电网公司科技项目(2008-508)

摘　　要：为了研究地震作用下特高压塔线耦联体系导线、地线的非线性振动响应,文中以单向和双向一致激励为主,通过输入不同加速度幅值的El Centro波、Taft波、Pasadena波及上海人工波,对某型特高压输电塔线耦联体系进行了缩尺模型振动台试验。试验主要分2种工况:将导线作为集中质量进行计算的方法以及挂有实际分裂导线模型的方法。试验结果表明:两种体系中塔体结构动力特性存在差别;地震作用下,挂线单塔各项动力反应峰值比相应的单塔悬挂集中质量有不同程度的降低,8度罕遇地震时较为显著,导线的非线性振动效应有利于该型输电塔动力反应幅值的降低。挂线单塔与挂集中质量单塔不同方向的加速度能量谱分布规律存在较大差异。In order to study the nonlinear seismic responses of transmission tower-conductor coupling system,shaking table tests on 1 000kV UHV transmission tower-line coupling system were carried out subjected to four types of ground motions with different peak ground acceleration in one direction and bi-direction.Two types of model were tested,including tower-conductor coupling system and independent tower with lumped mass to simulate the conductors.The results show that there are some differences in the vibration properties between these two structures.Seismic responses of the tower in the coupling system have been reduced compared with that of its counterpart,especially in the case of input ground motions with high seismic intensity due to the nonlinear vibration responses of the conductors.There is a big difference in the acceleration energy spectrum between the two structures in both cross-line and along-line directions.

关 键 词：特高压 塔线耦联体系 振动台试验 地震反应 非线性振动 集中质量 

分 类 号：P315.91[天文地球—地震学] TU392.6[天文地球—固体地球物理学]