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Shaking Table Tests of a Reduced-Scale UHV Transmission Tower-Line System Subjected to Near-Fault Ground Motions
International Journal of Structural Stability and Dynamics ( IF 3.6 ) Pub Date : 2020-04-17 , DOI: 10.1142/s0219455420400155
Li Tian 1 , Mengyao Zhou 1 , Haiyang Pan 1 , Aiqiang Xin 1 , Yuping Liu 1
Affiliation  

An ultra-high voltage (UHV) transmission system offers higher bulk capacity and transmission over longer distances compared with conventional transmission systems, and the dynamic responses of such systems have attracted the interest of researchers. This paper focuses on an experimental investigation of the seismic performance of a 1000 kV UHV transmission system subjected to near-fault ground motions. To reproduce the genuine structural responses, a 1:25 reduced-scale experimental model was designed and constructed based on Buckingham’s theorem. Four kinds of typical natural seismic records were selected, namely, far-field, pulseless near-fault, forward-directivity near-fault and fling-step near-fault ground motions, and shaking table tests were subsequently carried out. Furthermore, the influences of the coupling effect between towers and lines, two-component ground motions, and the near-fault effect on the seismic response were investigated. The results demonstrate that the above three factors have a significant influence on the structural response and should not be neglected in seismic analysis. This research enriches the available experimental data and provides a more comprehensive understanding of the seismic performance of UHV transmission systems.

中文翻译:

受近故障地面运动影响的缩小比例的特高压输电塔线系统的振动台试验

与传统输电系统相比,超高压(UHV)输电系统具有更高的容量和更长的传输距离,这种系统的动态响应引起了研究人员的兴趣。本文重点研究了 1000 kV 特高压输电系统在近断层地震动作用下的抗震性能。为了重现真实的结构响应,根据白金汉定理设计和构建了一个 1:25 缩小比例的实验模型。选取了4种典型的自然地震记录,即远场、无脉冲近断层、正向近断层和弹步近断层地震动,随后进行了振动台试验。此外,塔和线路之间的耦合效应的影响,研究了两分量地震动和近断层对地震响应的影响。结果表明,以上三个因素对结构响应有显着影响,在地震分析中不应忽视。本研究丰富了现有的实验数据,为特高压输电系统的抗震性能提供了更全面的认识。
更新日期:2020-04-17
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