Abstract
This paper presented an overview on the dynamic analysis and control of the transmission tower-line system in the past forty years. The challenges and future developing trends in the dynamic analysis and mitigation of the transmission tower-line system under dynamic excitations are also put forward. It also reviews the analytical models and approaches of the transmission tower, transmission lines, and transmission tower-line systems, respectively, which contain the theoretical model, finite element (FE) model and the equivalent model; shows the advances in wind responses of the transmission tower-line system, which contains the dynamic effects under common wind loading, tornado, downburst, and typhoon; and discusses the dynamic responses under earthquake and ice loads, respectively. The vibration control of the transmission tower-line system is also reviewed, which includes the magnetorheological dampers, friction dampers, tuned mass dampers, and pounding tuned mass dampers.
Highlights
The degradation of civil engineering structures due to harsh environment may lead to structural damage and failure, associated with the events such as member fracture, column buckling, and brace breakage [1, 2]
Transmission tower-line systems are prone to the dynamic excitation, such as wind, earthquake, and iced shedding
There exists a strong interaction between the motion of the truss tower and that of the transmission lines subjected to dynamic loading, each of which has frequency-dependent stiffness properties, leading to rather complex dynamic behaviour [4,5,6]
Summary
The degradation of civil engineering structures due to harsh environment may lead to structural damage and failure, associated with the events such as member fracture, column buckling, and brace breakage [1, 2]. It is relevant to assess the dynamic performance of transmission tower-line systems considering both elastic and inelastic responses. The dynamic interaction between the tower and transmission lines cannot be taken into consideration during the common design process The development and application of structural assessment and mitigation approaches for transmission tower-line systems in the fields of civil and electrical engineering have attracted more and more attention. To overcome the shortcomings of conventional approaches, many analytical models and approaches have been proposed and developed for transmission tower-line systems in recent years with the aid of various techniques such as wind engineering, earthquake engineering, structural health monitoring, and vibration control. The challenges and future trends in the disaster monitoring and mitigation of the transmission tower-line system subjected to dynamic excitations are put forward. The challenges and future trends in the dynamic assessment and mitigation of transmission tower-line system are summarized in the conclusions
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