alexa Performance evaluation of a transmission tower by substructure test


Journal of Steel Structures & Construction

Author(s): ByoungWook Moon, JiHun Park, SungKyung Lee, KyungWon Min

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In this paper, a half-scaled substructure test was performed to evaluate the failure mode of an existing transmission tower subjected to wind load. A loading scheme was devised to reproduce the dead and wind loads acting on the prototype transmission tower. The load was enforced on the model structure using two actuators and a triangular jig mounted on the reduced model. Preliminary numerical analysis was carried out to evaluate the stability and member force of the specimen for the design load. When the substructured transmission tower was loaded by 270% of its maximum allowable buckling load, local buckling occurred in joints of leg members with weak constraints. From the experimental results, such as load–displacement curves, displacements, and strains of members, it was concluded that the local buckling was due to the additional eccentric force caused by unbalanced deformation of the specimen.

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

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