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A compact nonlinear dynamic analysis technique for transmission line cascades

journal contribution
posted on 02.05.2019, 00:00 by F Alminhana, M Mason, Faris Albermani
Progressive failures, or cascades, have played a major role in numerous transmission system collapses around the globe during severe wind and ice storms. The failure of a line component overloads the system and initiates a failure sequence that can cause the collapse of many towers. This article describes the development of a special-purpose nonlinear dynamic analysis technique for the modelling of multi-span line sections under progressive failure scenarios. This method performs time-domain analysis based on a central finite difference scheme, adapted for a non-constant time increment. All the main line components are incorporated in the analysis. In particular, a special beam-column element is employed to describe geometric and material nonlinearities of angle members in steel lattice towers. The method is validated using full-scale test results for a single lattice tower and a line section containing seven towers. © 2017 Elsevier Ltd

Funding

Other

History

Volume

158

Start Page

164

End Page

174

Number of Pages

11

eISSN

1873-7323

ISSN

0141-0296

Publisher

Pergamon Press, UK

Peer Reviewed

Yes

Open Access

No

Acceptance Date

20/12/2017

External Author Affiliations

University of Queensland; Science and Technology Foundation (CIENTEC), Rio Grande do Sul, Brazil

Era Eligible

Yes

Journal

Engineering Structures