Elevated temperature material properties of stainless steel reinforcing bar

Journal article


Gardner, L, Bu, Y, Francis, P, Baddoo, NR, Cashell, KA and McCann, F (2016). Elevated temperature material properties of stainless steel reinforcing bar. Construction and Building Materials. 114, pp. 977-997.
AuthorsGardner, L, Bu, Y, Francis, P, Baddoo, NR, Cashell, KA and McCann, F
Abstract

© 2016 Elsevier Ltd. All rights reserved.Corrosion of carbon steel reinforcing bar can lead to deterioration of concrete structures, especially in regions where road salt is heavily used or in areas close to sea water. Although stainless steel reinforcing bar costs more than carbon steel, its selective use for high risk elements is cost-effective when the whole life costs of the structure are taken into account. Considerations for specifying stainless steel reinforcing bars and a review of applications are presented herein. Attention is then given to the elevated temperature properties of stainless steel reinforcing bars, which are needed for structural fire design, but have been unexplored to date. A programme of isothermal and anisothermal tensile tests on four types of stainless steel reinforcing bar is described: 1.4307 (304L), 1.4311 (304LN), 1.4162 (LDX 2101®) and 1.4362 (2304). Bars of diameter 12 mm and 16 mm were studied, plain round and ribbed. Reduction factors were calculated for the key strength, stiffness and ductility properties and compared to equivalent factors for stainless steel plate and strip, as well as those for carbon steel reinforcement. The test results demonstrate that the reduction factors for 0.2% proof strength, strength at 2% strain and ultimate strength derived for stainless steel plate and strip can also be applied to stainless steel reinforcing bar. Revised reduction factors for ultimate strain and fracture strain at elevated temperatures have been proposed. The ability of two-stage Ramberg-Osgood expressions to capture accurately the stress-strain response of stainless steel reinforcement at both room temperature and elevated temperatures is also demonstrated.

Keywords0905 Civil Engineering; 1202 Building; Building & Construction
Year2016
JournalConstruction and Building Materials
Journal citation114, pp. 977-997
PublisherElsevier
ISSN0950-0618
Digital Object Identifier (DOI)doi:10.1016/j.conbuildmat.2016.04.009
Publication dates
Print12 Apr 2016
Publication process dates
Deposited04 Jul 2017
Accepted03 Apr 2016
Accepted author manuscript
License
CC BY-NC-ND 4.0
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https://openresearch.lsbu.ac.uk/item/87482

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