Removable shear connector for steel-concrete composite bridges
Removable shear connector for steel-concrete composite bridges
The conception and experimental assessment of a removable friction-based shear connector (FBSC) for precast steel-concrete composite bridges is presented. The FBSC uses pre-tensioned high-strength steel bolts that pass through countersunk holes drilled on the top flange of the steel beam. Pre-tensioning of the bolts provides the FBSC with significant frictional resistance that essentially prevents relative slip displacement of the concrete slab with respect to the steel beam under service loading. The countersunk holes are grouted to prevent sudden slip of the FBSC when friction resistance is exceeded. Moreover, the FBSC promotes accelerated bridge construction by fully exploiting prefabrication, does not raise issues relevant to precast construction tolerances, and allows rapid bridge disassembly to drastically reduce the time needed to replace any deteriorating structural component (e.g., the bridge deck). A series of 11 push-out tests highlight why the novel structural details of the FBSC result in superior shear load-slip displacement behavior compared to welded shear studs. The paper also quantifies the effects of bolt diameter and bolt preload and presents a design equation to predict the shear resistance of the FBSC.
Shear connectors, Shear resistance, Slip capacity, Steel-concrete composite bridges
107-123
Suwaed, Ahmed S.H.
dd250b9d-c0cd-45b8-88b1-5dc7c4f5b13e
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Suwaed, Ahmed S.H.
dd250b9d-c0cd-45b8-88b1-5dc7c4f5b13e
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Suwaed, Ahmed S.H. and Karavasilis, Theodore L.
(2018)
Removable shear connector for steel-concrete composite bridges.
Steel and Composite Structures, 29 (1), .
(doi:10.12989/scs.2018.29.1.107).
Abstract
The conception and experimental assessment of a removable friction-based shear connector (FBSC) for precast steel-concrete composite bridges is presented. The FBSC uses pre-tensioned high-strength steel bolts that pass through countersunk holes drilled on the top flange of the steel beam. Pre-tensioning of the bolts provides the FBSC with significant frictional resistance that essentially prevents relative slip displacement of the concrete slab with respect to the steel beam under service loading. The countersunk holes are grouted to prevent sudden slip of the FBSC when friction resistance is exceeded. Moreover, the FBSC promotes accelerated bridge construction by fully exploiting prefabrication, does not raise issues relevant to precast construction tolerances, and allows rapid bridge disassembly to drastically reduce the time needed to replace any deteriorating structural component (e.g., the bridge deck). A series of 11 push-out tests highlight why the novel structural details of the FBSC result in superior shear load-slip displacement behavior compared to welded shear studs. The paper also quantifies the effects of bolt diameter and bolt preload and presents a design equation to predict the shear resistance of the FBSC.
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More information
Accepted/In Press date: 31 July 2018
e-pub ahead of print date: 10 October 2018
Keywords:
Shear connectors, Shear resistance, Slip capacity, Steel-concrete composite bridges
Identifiers
Local EPrints ID: 427320
URI: http://eprints.soton.ac.uk/id/eprint/427320
ISSN: 1229-9367
PURE UUID: 2cfce39d-8962-4d8d-9e81-090168b1982f
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Date deposited: 11 Jan 2019 17:30
Last modified: 17 Mar 2024 12:13
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Contributors
Author:
Ahmed S.H. Suwaed
Author:
Theodore L. Karavasilis
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