Experimental study on the behaviour of austenitic stainless steel and carbon steel welded shear connectors
Experimental study on the behaviour of austenitic stainless steel and carbon steel welded shear connectors
Steel-concrete composite beams are commonly used in bridge construction. The corrosion of the supporting steel beams is known to be a cause of deterioration of composite bridges, while the shear connectors may also be at risk of corrosion from chlorides migrating through cracks in the concrete deck. Stainless steel composite beams offer a viable solution to the steel corrosion problem in harsh environments. However, their design is outside the scope of the current international design standards due to a lack of reliable experimental data. This paper investigates the structural behaviour of austenitic EN 1.4301 stainless steel and carbon steel shear studs welded to lean duplex EN 1.4162 I-section beams, focusing on the strength, ductility and the weld quality of the studs. Material tests were conducted on the studs and welded connection, with weld quality examined through X-ray computerised tomography (CT) scanning and etching. The paper also presents the results from eight push-out tests, assessing the shear stud resistance predicted by existing international design codes for steel-concrete composite construction. In particular, the European and U.S. bridge design codes were found to give safe-sided shear resistance predictions for the austenitic stainless steel studs welded onto lean duplex beams, which performed comparably to literature test results on carbon steel studs welded to carbon steel beams. However, the carbon steel studs could not be successfully stud welded to lean duplex stainless steel beams, thus their use is not recommended in lean duplex stainless steel composite beams. It is the authors’ intention that the results presented herein will contribute to the development of the design rules for shear connectors needed for the European and U.S. design codes for duplex stainless steel composite bridges.
composite beam,, push-out tests,, shear connector,, stainless steel,, welded stud.
Presswood, R.
d432390b-beb2-4f14-801f-5a21e404f96b
Afshan, S.
68dcdcac-c2aa-4c09-951c-da4992e72086
Meza, F.
9b87b767-c299-4fca-9b59-708707ec389c
Baddoo, N.
7151609e-55d1-46fc-bb79-9d5502c92c6f
Shaheen, M.
e4b3a715-84b2-4b42-b428-89123485c796
Desnerck, P.
a9e17bd0-4e18-47bc-b2d1-55ef92e33266
19 September 2024
Presswood, R.
d432390b-beb2-4f14-801f-5a21e404f96b
Afshan, S.
68dcdcac-c2aa-4c09-951c-da4992e72086
Meza, F.
9b87b767-c299-4fca-9b59-708707ec389c
Baddoo, N.
7151609e-55d1-46fc-bb79-9d5502c92c6f
Shaheen, M.
e4b3a715-84b2-4b42-b428-89123485c796
Desnerck, P.
a9e17bd0-4e18-47bc-b2d1-55ef92e33266
Presswood, R., Afshan, S., Meza, F., Baddoo, N., Shaheen, M. and Desnerck, P.
(2024)
Experimental study on the behaviour of austenitic stainless steel and carbon steel welded shear connectors.
Engineering Structures, 321, [118930].
(doi:10.1016/j.engstruct.2024.118930).
Abstract
Steel-concrete composite beams are commonly used in bridge construction. The corrosion of the supporting steel beams is known to be a cause of deterioration of composite bridges, while the shear connectors may also be at risk of corrosion from chlorides migrating through cracks in the concrete deck. Stainless steel composite beams offer a viable solution to the steel corrosion problem in harsh environments. However, their design is outside the scope of the current international design standards due to a lack of reliable experimental data. This paper investigates the structural behaviour of austenitic EN 1.4301 stainless steel and carbon steel shear studs welded to lean duplex EN 1.4162 I-section beams, focusing on the strength, ductility and the weld quality of the studs. Material tests were conducted on the studs and welded connection, with weld quality examined through X-ray computerised tomography (CT) scanning and etching. The paper also presents the results from eight push-out tests, assessing the shear stud resistance predicted by existing international design codes for steel-concrete composite construction. In particular, the European and U.S. bridge design codes were found to give safe-sided shear resistance predictions for the austenitic stainless steel studs welded onto lean duplex beams, which performed comparably to literature test results on carbon steel studs welded to carbon steel beams. However, the carbon steel studs could not be successfully stud welded to lean duplex stainless steel beams, thus their use is not recommended in lean duplex stainless steel composite beams. It is the authors’ intention that the results presented herein will contribute to the development of the design rules for shear connectors needed for the European and U.S. design codes for duplex stainless steel composite bridges.
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Presswood et al. 2024_Experimental study push-out stainless steel_Engineering Structures_author version
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More information
Accepted/In Press date: 3 September 2024
e-pub ahead of print date: 19 September 2024
Published date: 19 September 2024
Keywords:
composite beam,, push-out tests,, shear connector,, stainless steel,, welded stud.
Identifiers
Local EPrints ID: 495903
URI: http://eprints.soton.ac.uk/id/eprint/495903
ISSN: 0141-0296
PURE UUID: e10e7682-2499-42c3-af81-0831f1d519f1
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Date deposited: 27 Nov 2024 17:34
Last modified: 28 Nov 2024 03:00
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Contributors
Author:
F. Meza
Author:
N. Baddoo
Author:
M. Shaheen
Author:
P. Desnerck
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