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论文类型：期刊论文

发表时间：2017-08-01

发表刊物：INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS

收录刊物：Scopus、SCIE、EI

卷号：17

期号：6

ISSN号：0219-4554

关键字：Transmission tower-line system; conductor breaking; stability analysis; dynamic impact; collapse simulation

摘要：Ice loads exerted on the transmission line can increase the probability of conductor breaking, which will lead to the stability failure of transmission towers. In this paper, a transmission tower-line system is established for two towers and three span lines. Then the nonlinear static stability analysis and nonlinear dynamic stability analysis induced by the conductor breaking are carried out to obtain the load versus displacement curves, while studying the failure modes of the transmission tower-line system. Moreover, the ice load and initial eccentricity are considered in the numerical simulation. In addition, a parametric analysis is performed to investigate the influence of span, insulator length and initial tension force on the stability failure of the system. The results show that the dynamic instability will occur earlier than the static instability due to the dynamic impact effect and conductor breaking with ice loads can lead to the progressive collapse of the transmission tower-line system. Finally, the span length has the greatest effect on the response of transmission tower caused by conductor breaking.