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Effect of strain ageing on the mechanical properties of partially damaged structural mild steel

Hosseini, Sajjad, Heidarpour, Amin, Collins, Frank and Hutchinson, Christopher R. 2015, Effect of strain ageing on the mechanical properties of partially damaged structural mild steel, Construction and building materials, vol. 77, pp. 83-93, doi: 10.1016/j.conbuildmat.2014.12.021.

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Title Effect of strain ageing on the mechanical properties of partially damaged structural mild steel
Author(s) Hosseini, Sajjad
Heidarpour, Amin
Collins, Frank
Hutchinson, Christopher R.
Journal name Construction and building materials
Volume number 77
Start page 83
End page 93
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0950-0618
Keyword(s) Strain ageing
Damaged structures
Steel material
Ramberg-Osgood
Micro-structure
Summary ABSTRACT
This paper addresses the strain ageing effects on the mechanical properties of the partially damaged structural mild steel. Since repairing partly damaged structures may not occur immediately, the strain ageing effect can significantly influence the structural behaviour. The changes due to this effect have not so far been considered in the civil engineering design guidelines. In order to investigate strain ageing effects, two-stage experimental tests are carried out on the mild-steel specimens. In the first stage, partial damage is made using quasi-static loading. During the second stage, the strength and ductility of the specimens are examined after 2 and 7 days ‘ageing’ at room temperature and the results are compared with the corresponding no-age samples. The microstructure of the specimens is examined using scanning electron microscopy (SEM). To illustrate the effect of strain ageing on the global behaviour of steel structures, a numerical example is provided in which strain ageing impacts on loading capacity and deflection of a steel beam. Finally, the stress–strain relation of partially damaged mild-steel material incorporating strain ageing effects is expressed by calibrating the parameters of Ramberg–Osgood model.
Language eng
DOI 10.1016/j.conbuildmat.2014.12.021
Field of Research 090506 Structural Engineering
Socio Economic Objective 870301 Cement and Concrete Materials
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID ARC DP1096454
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30078487

Document type: Journal Article
Collection: Institute for Frontier Materials
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