Continuous beams of aluminum alloy tubular cross sections. II: Parametric study and design

M.-N. Su, Ben Young, L. Gardner

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)


© 2014 American Society of Civil Engineers.Aluminum alloys are employed in a range of structural engineering applications, supported by many international design standards, but plastic design methods are generally not permitted. In the second part of this study, an extensive numerical parametric study is conducted to assess the effect of key parameters, such as cross section slenderness, cross section aspect ratio, and moment gradient on the strength, strain hardening, and moment redistribution behavior of aluminum alloy continuous beams. The key input parameters and findings are reported herein. Based on both the experimental and parametric numerical results, the design provisions of the American, Australian/New Zealand, and European specifications as well as the traditional plastic design method, the plastic hinge method, and the continuous strength method (CSM) for indeterminate structures, the scope of which is extended in the present study, have been evaluated. The design strengths predicted by the three specifications were found to be rather conservative, while the predications of the latter three methods are more precise and consistent. The results reveal that strain hardening at the cross-sectional level and moment redistribution at the global system level have significant influence on the performance of stocky (plastic and compact sections) aluminum alloy members, which should be accounted for in design. Following reliability analysis, proposals are made for revised design provisions.
Original languageEnglish
Article number04014233
JournalJournal of Structural Engineering (United States)
Issue number9
Publication statusPublished - 1 Jan 2015
Externally publishedYes


  • Aluminum alloys
  • Continuous beams
  • Tubular sections
  • Continuous strength method
  • Indeterminate structures
  • Metal and composite structures
  • Parametric study
  • Plastic design
  • Reliability analysis
  • Square and rectangular hollow sections
  • Structural design

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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