The continuous strength method for the design of stainless steel hollow section columns
Author(s)
Arrayago, Itsaso
Real, Esther
Mirambell, Enrique
Gardner, Leroy
Type
Journal Article
Abstract
The Continuous Strength Method (CSM) provides accurate resistance predictions for both stocky and
slender stainless steel cross-sections; in the case of the former, allowance is made for the beneficial
effects of strain hardening, while for the latter, design is simplified by the avoidance of effective width
calculations. Although the CSM strain limits can be used in conjunction with advanced analysis for the
stability design of members, for hand calculations, the method is currently limited to the determination
of cross-sectional resistance only, i.e. member buckling resistance is not covered. To address this
limitation, extension of the CSM to the design of stainless steel tubular section columns is presented
herein. The proposed approach is based on the traditional Ayrton-Perry formulation, but features
enhanced CSM cross-section resistances and a generalized imperfection parameter that is a function of
cross-section slenderness. The value of the imperfection parameter increases as the slenderness of the
cross-section reduces to compensate for the detrimental effect of plasticity on member stability that is
not directly captured in the elastic/first yield Ayrton-Perry approach. The accuracy of the proposed
approach is assessed against numerical results generated in the current study and existing experimental
results collected from the literature. The presented comparisons show that the CSM provides
consistently more accurate member buckling resistance predictions than the current EN 1993-1-4 design
rules for all stainless steel grades. The reliability of the proposed approach is demonstrated through
statistical analyses performed in accordance with EN 1990. Finally, the paper presents a framework
through which the proposed approach can be developed for other cross-section types and materials.
slender stainless steel cross-sections; in the case of the former, allowance is made for the beneficial
effects of strain hardening, while for the latter, design is simplified by the avoidance of effective width
calculations. Although the CSM strain limits can be used in conjunction with advanced analysis for the
stability design of members, for hand calculations, the method is currently limited to the determination
of cross-sectional resistance only, i.e. member buckling resistance is not covered. To address this
limitation, extension of the CSM to the design of stainless steel tubular section columns is presented
herein. The proposed approach is based on the traditional Ayrton-Perry formulation, but features
enhanced CSM cross-section resistances and a generalized imperfection parameter that is a function of
cross-section slenderness. The value of the imperfection parameter increases as the slenderness of the
cross-section reduces to compensate for the detrimental effect of plasticity on member stability that is
not directly captured in the elastic/first yield Ayrton-Perry approach. The accuracy of the proposed
approach is assessed against numerical results generated in the current study and existing experimental
results collected from the literature. The presented comparisons show that the CSM provides
consistently more accurate member buckling resistance predictions than the current EN 1993-1-4 design
rules for all stainless steel grades. The reliability of the proposed approach is demonstrated through
statistical analyses performed in accordance with EN 1990. Finally, the paper presents a framework
through which the proposed approach can be developed for other cross-section types and materials.
Date Issued
2020-09
Date Acceptance
2020-05-09
Citation
Thin Walled Structures, 2020, 154, pp.1-12
ISSN
0263-8231
Publisher
Elsevier
Start Page
1
End Page
12
Journal / Book Title
Thin Walled Structures
Volume
154
Copyright Statement
© 2020 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/
Identifier
https://www.sciencedirect.com/science/article/pii/S0263823120307035?via%3Dihub
Subjects
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Civil Engineering
Publication Status
Published online
Date Publish Online
2020-06-17