Experimental study of critical and post-buckling behaviour of prestressed stayed columns

Adelaja Israel Osofero, M. Ahmer Wadee*, Leroy Gardner

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

A full scale experimental investigation into the strength and behaviour of prestressed steel stayed columns in compression has been conducted. Results, including full load versus end-shortening curves, for a total of 18 test specimens are presented. Two critical modes of buckling - symmetric and antisymmetric - with interactive post-buckling are demonstrated experimentally and the imperfection sensitivity of the stayed columns is investigated. Interactive buckling is observed primarily when the individual buckling loads of the antisymmetric and symmetric modes are close or when the antisymmetric mode is critical. Analysis of the results reveals that increased prestress leads to an increased load-carrying capacity when instability occurs in the symmetric mode, but the reverse trend is found when the antisymmetric mode is critical.

Original languageEnglish
Pages (from-to)226-241
Number of pages16
JournalJournal of Constructional Steel Research
Volume79
DOIs
Publication statusPublished - Dec 2012

Keywords

  • cable system
  • cross-arm
  • interactive buckling
  • physical experiments
  • post-buckling
  • prestressed stayed columns
  • steel structures
  • ultimate load

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