Stability and design of fixed-ended stainless steel equal-leg angle section compression members
Author(s)
Behzadi Sofiani, B
Gardner, L
Wadee, MA
Type
Journal Article
Abstract
The stability and design of fixed-ended stainless steel equal-leg angle section members subjected to axial compression are studied herein. An experimental investigation, comprising material testing, initial geometric imperfection measurements and tests on hot-rolled austenitic stainless steel equal-leg angle section columns is first presented. The test results, in combination with existing experimental data on stainless steel equal-leg angle section columns collected from the literature, are then used for the validation of numerical (shell finite element) models, developed within the commercial package ABAQUS. Validation is performed by means of comparisons between the test and numerical results, considering ultimate loads, failure modes and the load–deformation responses, all of which are shown to be generally in good agreement. A numerical parametric study is then presented considering angle section columns in the three main families of stainless steel (austenitic, ferritic and duplex) with a wide range of slenderness values. The behaviour and normalised load-carrying capacity of the studied members is shown to be dependent on not only the column slenderness, but also the ratio of the elastic torsional-flexural buckling load to the elastic minor-axis flexural buckling load. Finally, a design approach recently proposed for carbon steel angle section columns is extended for application to stainless steel, and verified against the experimental and numerical results. The proposed approach offers substantially improved accuracy and consistency in strength predictions compared to the existing codified design rules. The reliability of the new design provisions, with a recommended partial safety factor ϒM1 = 1.1, is verified following the EN 1990 procedure.
Date Issued
2021-12-15
Date Acceptance
2021-09-22
Citation
Engineering Structures, 2021, 249
ISSN
0141-0296
Publisher
Elsevier
Journal / Book Title
Engineering Structures
Volume
249
Copyright Statement
© 2021 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Engineering, Civil
Engineering
Stainless steel
Equal-leg angles
Fixed-ended angle columns
Torsional-flexural buckling
Torsional-flexural strength
EC3 design procedure
BUCKLING BEHAVIOR
CURVES
Civil Engineering
0905 Civil Engineering
0912 Materials Engineering
0915 Interdisciplinary Engineering
Publication Status
Published
Article Number
ARTN 113281
Date Publish Online
2021-10-13