Testing and numerical modelling of austenitic stainless steel CHS beam-columns

Title: Testing and numerical modelling of austenitic stainless steel CHS beam-columns
Authors: Zhao, O
Gardner, L
Young, B
Item Type: Journal Article
Abstract: This paper presents a comprehensive experimental and numerical study of the global stability of stainless steel circular hollow section (CHS) structural members subjected to combined axial load and bending moment. The experimental investigation, which was carried out on two grade 1.4301 austenitic stainless steel cross-section sizes (CHS 60.5 × 2.8 and CHS 76.3 × 3), included material coupon tests, initial geometric measurements, two column tests, and ten beam–column tests. The test results were employed in a parallel numerical simulation programme for the validation of finite element (FE) models, by means of which a series of parametric studies were carried out to extend the available results over a wider range of cross-section sizes, member lengths and loading combinations. The experimentally and numerically derived data were used to assess the structural performance of CHS beam–columns and to determine the accuracy of the current design provisions given in the European code, American specification, Australian/New Zealand standard, and other recent proposed approaches. Generally, all the existing design methods were shown to yield a high degree of scatter in the prediction of beam–column strength, with both conservative and over-predicted capacities. The scatter was attributed mainly to inaccurate predictions of the column buckling and bending end points of the design beam–column interaction curves (i.e. member strengths under pure compression and pure bending, respectively) and inaccurate interaction factors. The development of improved provisions for the design of stainless steel circular hollow section beam–columns is currently underway.
Issue Date: 6-Jan-2016
Date of Acceptance: 21-Dec-2015
URI: http://hdl.handle.net/10044/1/38978
DOI: http://dx.doi.org/10.1016/j.engstruct.2015.12.035
ISSN: 1873-7323
Publisher: Elsevier
Start Page: 263
End Page: 274
Journal / Book Title: Engineering Structures
Volume: 111
Copyright Statement: © 2016 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Engineering, Civil
Austenitic stainless steel
Beam-column tests
Circular hollow section
Global buckling
Numerical modelling
Parametric studies
Structural design
Civil Engineering
0905 Civil Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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