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Derivation of strain hardening factor from mill tests

Derivation of strain hardening factor from mill tests
Derivation of strain hardening factor from mill tests
Experimental bending tests carried out to assess the reliability of the plastic moment of resistance formula revealed experimental bending strengths that typically exceeded their theoretical plastic moment capacities by an average of 18%. These findings are based on tests carried out on lightweight sections, whose stress strain characteristics showed strain hardening immediately after yielding, with no significant zone of plasticity. It is not understood whether the results are transferable to heavier sections and this work attempts to answer the scale effects question. A method for predicting the full (elastic and post-plastic) moment-rotation curves for laterally restrained steel beams, based on stress-strain data from mill tests is explained. A comparison between experimental and theoretical moment vs. end rotations shows that the method is capable of predicting strength and ductility with a high degree of accuracy. Furthermore, a survey of mill test results from a variety of section sizes is presented, the results of which are used to characterise strain-hardening effects for sections with differing span to depth ratios. Thus, the effect that section size and span to depth ratio has on strength and ductility is assessed.
Byfield, M.P.
35515781-c39d-4fe0-86c8-608c87287964
Dhanalakshmi, M.
3f5ae523-af24-4bee-83c6-c24562e900c6
Byfield, M.P.
35515781-c39d-4fe0-86c8-608c87287964
Dhanalakshmi, M.
3f5ae523-af24-4bee-83c6-c24562e900c6

Byfield, M.P. and Dhanalakshmi, M. (2002) Derivation of strain hardening factor from mill tests. Advances in Steel Structures (ICASS 02). 09 - 11 Dec 2002.

Record type: Conference or Workshop Item (Paper)

Abstract

Experimental bending tests carried out to assess the reliability of the plastic moment of resistance formula revealed experimental bending strengths that typically exceeded their theoretical plastic moment capacities by an average of 18%. These findings are based on tests carried out on lightweight sections, whose stress strain characteristics showed strain hardening immediately after yielding, with no significant zone of plasticity. It is not understood whether the results are transferable to heavier sections and this work attempts to answer the scale effects question. A method for predicting the full (elastic and post-plastic) moment-rotation curves for laterally restrained steel beams, based on stress-strain data from mill tests is explained. A comparison between experimental and theoretical moment vs. end rotations shows that the method is capable of predicting strength and ductility with a high degree of accuracy. Furthermore, a survey of mill test results from a variety of section sizes is presented, the results of which are used to characterise strain-hardening effects for sections with differing span to depth ratios. Thus, the effect that section size and span to depth ratio has on strength and ductility is assessed.

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More information

Published date: 2002
Venue - Dates: Advances in Steel Structures (ICASS 02), 2002-12-09 - 2002-12-11

Identifiers

Local EPrints ID: 53906
URI: http://eprints.soton.ac.uk/id/eprint/53906
PURE UUID: 97c38fac-e4e7-440b-b5c2-55478eac7a18
ORCID for M.P. Byfield: ORCID iD orcid.org/0000-0002-9724-9472

Catalogue record

Date deposited: 25 Jul 2008
Last modified: 18 May 2019 00:35

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