alexa Modelling of tornado and microburst-induced wind loading and failure of a lattice transmission tower


Journal of Steel Structures & Construction

Author(s): Eric Savory, Gerard AR Parke, Mostafa Zeinoddini, Norman Toy, Peter Disney

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Many transmission line and tower failures worldwide are attributed to high intensity winds (HIW) associated with tornadoes and microbursts. This paper describes models for the wind velocity time–histories of transient tornado and microburst events and the resulting loading on a lattice tower. A dynamic structural analysis has been undertaken for two HIW events, predicting a tornado- induced shear failure, as observed in the field. However, the microburst does not produce failure, due to its lower intensity and longer duration. Indeed, such failures, if they occur in practice, are likely to be associated with a more broad-fronted microburst loading in which conductor loads contribute.

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This article was published in Engineering Structures and referenced in Journal of Steel Structures & Construction

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