Further experimental studies of the collapse of welded aluminium plate girders

C. A. Burt, H. R. Evans, O. Vilnay

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This paper describes eleven tests which were conducted to study the collapse behaviour of welded 7020 series aluminium alloy girders. The girders were of varying proportions and were subjected predominantly to shear loads. It is observed that, although shear sway mechanisms develop in a similar manner to those in steel girders, the webs of the aluminium girders fracture within the heat-affected zones adjacent to the perimeter welds. This confirms earlier observations for girders fabricated from 6082 aluminium alloy. Comparisons of predicted and measured values show the tension field theory, originally developed for steel girders, to give a reasonable estimate of the shear capacity of 7020 aluminium alloy girders. An earlier modification of the tension field theory proposed for 6082 alloy girders is seen to lead to very conservative predictions for the 7020 alloy girders. It is concluded that an improved theory is required to represent the true collapse behaviour of all aluminium girders.

Original languageEnglish
Pages (from-to)19-39
Number of pages21
JournalThin-Walled Structures
Issue number1
StatePublished - 1 Jan 1989
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering


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