Design of web-tapered steel I-section members by second-order inelastic analysis with strain limits
Author(s)
Quan, Chunyan
Kucukler, Merih
Gardner, Leroy
Type
Journal Article
Abstract
A consistent design approach, performed by second-order inelastic analysis using beam finite elements with strain limits, is proposed for web-tapered steel members. In the proposed design approach, a geometrically and materially nonlinear analysis with imperfections (GMNIA) of the tapered steel member is carried out and the ultimate strength of the member is signified by reaching either the strain limit defined according to the Continuous Strength Method (CSM) or the peak load factor, whichever occurs first. To consider the beneficial effect of strain gradients along the lengths of the members on local cross-section resistances, the strains are averaged over the local buckling half-wavelength. The accuracy of the proposed design approach is verified against results from nonlinear shell finite element modelling as well as a number of experiments on tapered members considering various taper ratios, loading conditions and member slenderness values. The proposed method provides more accurate and consistent ultimate strength predictions than EN 1993-1-1 [1], because the following aspects, which are ignored in traditional design methods, are captured: (1) the interaction between cross-section elements for the consideration of local buckling, (2) the influence of local moment gradients on cross-section resistance, (3) the partial plastification of cross-sections and (4) strain hardening.
Date Issued
2020-12-01
Date Acceptance
2020-08-17
Citation
Engineering Structures, 2020, 224, pp.1-16
ISSN
0141-0296
Publisher
Elsevier BV
Start Page
1
End Page
16
Journal / Book Title
Engineering Structures
Volume
224
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/S0141029620338438?via%3Dihub
Subjects
Civil Engineering
0905 Civil Engineering
0912 Materials Engineering
0915 Interdisciplinary Engineering
Publication Status
Published
Article Number
111242
Date Publish Online
2020-09-08