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

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Title: Continuous beams of aluminum alloy tubular cross sections. II: parametric study and design
Authors: Su, M-N
Young, B
Gardner, L
Item Type: Journal Article
Abstract: 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.
Issue Date: 1-Dec-2014
Date of Acceptance: 29-Oct-2014
ISSN: 1943-541X
Publisher: American Society of Civil Engineers
Journal / Book Title: Journal of Structural Engineering
Volume: 141
Issue: 9
Copyright Statement: © 2014 ASCE (American Society of Civil Engineers)
Keywords: Science & Technology
Construction & Building Technology
Engineering, Civil
Aluminum alloys
Continuous beams
Continuous strength method
Indeterminate structures
Parametric study
Plastic design
Reliability analysis
Square and rectangular hollow sections
Structural design
Tubular sections
Metal and composite structures
Civil Engineering
Publication Status: Published
Article Number: ARTN 04014233
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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