Classification of aluminium alloy cross-sections

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Title: Classification of aluminium alloy cross-sections
Authors: Su, M-N
Young, B
Gardner, L
Item Type: Journal Article
Abstract: Cross-section classification is one of the key concepts in the design of metallic structures. Current design specifications for aluminium alloys, such as Eurocode 9 (EC9), provide clear definitions and discrete design capacities for four different classes of cross-section. On the basis of substantial, recently generated experimental and numerical data on aluminium alloy cross-sections collected from the literature, the purpose of the present study is to re-evaluate the slenderness limits that define these classes. A total of approximately 900 relevant data points have been gathered, covering stub columns, simply supported beams and continuous beams; the cross-section types include square and rectangular hollow sections (SHS/RHS) with and without internal stiffeners, I-sections, channels and angles. The members were extruded from a variety of aluminium alloy tempers with a wide range of yield and ultimate strengths. Following analysis of the available data, the slenderness limits in EC9 have been re-assessed, and new slenderness limits in the EC9 framework are proposed. In addition, the full cross-section slenderness allowing for element interaction, which is utilised in the direct strength method (DSM) and the continuous strength method (CSM) has been considered as the slenderness parameter in a new classification framework. Corresponding slenderness limits, together with a compatible effective thickness formula for Class 4 sections, are proposed. The suitability of the proposed limits has been demonstrated for the conventional design methods in EC9, as well as the alternative methods in Annexes F and H of EC9.
Issue Date: 19-Apr-2017
Date of Acceptance: 4-Mar-2017
URI: http://hdl.handle.net/10044/1/49615
DOI: https://dx.doi.org/10.1016/j.engstruct.2017.03.007
ISSN: 0141-0296
Publisher: Elsevier
Start Page: 29
End Page: 40
Journal / Book Title: Engineering Structures
Volume: 141
Copyright Statement: © 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Engineering, Civil
Engineering
Aluminium alloys
Continuous beams
Continuous strength method (CSM)
Cross-section classification
Effective thickness formula
Reliability analysis
Simply supported beams
Slenderness limits
Stub columns
RECTANGULAR HOLLOW SECTIONS
FLEXURAL BEHAVIOR
STRENGTH METHOD
MEMBERS
DESIGN
COMPRESSION
ELEMENTS
SQUARE
BEAMS
0905 Civil Engineering
Civil Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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