Stability and design of continuous steel beams in the strain-hardening range
Author(s)
Foster, ASJ
Gardner, L
Type
Journal Article
Abstract
We examine the lateral stability implications of allowing for strain-hardening in the design of continuous steel beams through a programme of experiments, numerical modelling and parametric studies. Six tests are performed on continuous beams that are partially restrained against lateral torsional buckling. Restraint spacings are chosen to give non-dimensional lateral torsional slenderness values of 0.3 and 0.4. Bending resistances determined by the continuous strength method (CSM), which takes into account strain-hardening, are shown to be exceeded. We present a numerical model validated against the laboratory test data to conduct parametric studies that investigate the range of slenderness values for which the CSM is beneficial, and to examine the interaction between beam segments with unequal loads. Neglecting beneficial interactions between neighbouring beam segments, to achieve the degree of rotation capacity required for Class 1 sections designed using the continuous strength method, closer restraint spacing than the minimum specified by EN 1993-1-1 (2005) is required. A basic design approach is presented that incorporates a limiting lateral torsional slenderness for the CSM of 0.2, and a simple transition function from bending resistances predicted by simple plastic theory to those predicted by the CSM.
Date Issued
2017-05-26
Date Acceptance
2017-05-10
Citation
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2017, 136, pp.162-176
ISSN
0143-974X
Publisher
ELSEVIER SCI LTD
Start Page
162
End Page
176
Journal / Book Title
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
Volume
136
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/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000405047200014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Construction & Building Technology
Engineering, Civil
Engineering
BEHAVIOR
0905 Civil Engineering
Civil Engineering
Publication Status
Published