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Effect of strain hardening on flexural properties of steel beams

Effect of strain hardening on flexural properties of steel beams
Effect of strain hardening on flexural properties of steel beams
The results of 32 steel beam tests, with closely spaced lateral restraints, and associated mill and coupon tests provide an interesting insight into the additional moment capacity available due to strain hardening. Differences are identified in the yielding and strain hardening behaviour exhibited in the mill and coupon tests.
While the mill tests generally provide a safe estimate of the yield stress, the coupon tests give a better measure of the strain hardening characteristics of the beams.
A bi-linear moment–curvature relationship provides an accurate representation of the moment–rotation measurements in the beam tests. A simple model is proposed for predicting the critical flange strain at which interactive local and lateral buckling limit the maximum moment and associated curvature in the beam.
Criteria are identified for utilising an additional 8% of moment capacity above the conventional plastic moment in the plastic design of beams.
1466-5123
29-34
Byfield, M.P.
35515781-c39d-4fe0-86c8-608c87287964
Kemp, A.R.
215d44db-f5e4-4864-ac69-29c436000771
Nethercot, D.A.
7e9d9773-774f-4ae8-ba8e-90620ef13537
Byfield, M.P.
35515781-c39d-4fe0-86c8-608c87287964
Kemp, A.R.
215d44db-f5e4-4864-ac69-29c436000771
Nethercot, D.A.
7e9d9773-774f-4ae8-ba8e-90620ef13537

Byfield, M.P., Kemp, A.R. and Nethercot, D.A. (2002) Effect of strain hardening on flexural properties of steel beams. Structural Engineer, 80 (8), 29-34.

Record type: Article

Abstract

The results of 32 steel beam tests, with closely spaced lateral restraints, and associated mill and coupon tests provide an interesting insight into the additional moment capacity available due to strain hardening. Differences are identified in the yielding and strain hardening behaviour exhibited in the mill and coupon tests.
While the mill tests generally provide a safe estimate of the yield stress, the coupon tests give a better measure of the strain hardening characteristics of the beams.
A bi-linear moment–curvature relationship provides an accurate representation of the moment–rotation measurements in the beam tests. A simple model is proposed for predicting the critical flange strain at which interactive local and lateral buckling limit the maximum moment and associated curvature in the beam.
Criteria are identified for utilising an additional 8% of moment capacity above the conventional plastic moment in the plastic design of beams.

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More information

Published date: 2002

Identifiers

Local EPrints ID: 53914
URI: http://eprints.soton.ac.uk/id/eprint/53914
ISSN: 1466-5123
PURE UUID: d266358d-1782-4b90-af18-5d7ae6049111
ORCID for M.P. Byfield: ORCID iD orcid.org/0000-0002-9724-9472

Catalogue record

Date deposited: 22 Jul 2008
Last modified: 10 Dec 2019 01:46

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Contributors

Author: M.P. Byfield ORCID iD
Author: A.R. Kemp
Author: D.A. Nethercot

University divisions

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