Novel demountable shear connector for accelerated disassembly, repair or replacement of precast steel-concrete composite bridges
Novel demountable shear connector for accelerated disassembly, repair or replacement of precast steel-concrete composite bridges
A novel demountable shear connector for precast steel-concrete composite bridges is presented. The connector uses high-strength steel bolts, which are fastened to the top flange of the steel beam with the aid of a special locking nut configuration that prevents bolts from slipping within their holes. Moreover, the connector promotes accelerated construction and overcomes the typical construction tolerance issues of precast structures. Most importantly, the connector allows bridge disassembly. Therefore, it can address different bridge deterioration scenarios with minimum disturbance to traffic flow including the following: (1) precast deck panels can be rapidly uplifted and replaced; (2) connectors can be rapidly removed and replaced; and (3) steel beams can be replaced, whereas precast decks and shear connectors can be reused. A series of push-out tests are conducted to assess the behavior of the connector and quantify the effect of important parameters. The experimental results show shear resistance, stiffness, and slip capacity significantly higher than those of welded shear studs along with superior stiffness and strength against slab uplift. Identical tests reveal negligible scatter in the shear load-slip displacement behavior. A design equation is proposed to predict the shear resistance with absolute error less than 8%.
Suwaed, Ahmed
58343196-3fa9-4332-9240-1e396d1d69aa
Karavasilis, Theodore
15850eb0-6af4-4b6e-bab4-d5bde281b769
September 2017
Suwaed, Ahmed
58343196-3fa9-4332-9240-1e396d1d69aa
Karavasilis, Theodore
15850eb0-6af4-4b6e-bab4-d5bde281b769
Suwaed, Ahmed and Karavasilis, Theodore
(2017)
Novel demountable shear connector for accelerated disassembly, repair or replacement of precast steel-concrete composite bridges.
Journal of Bridge Engineering, 22 (9).
(doi:10.1061/(ASCE)BE.1943-5592.0001080).
Abstract
A novel demountable shear connector for precast steel-concrete composite bridges is presented. The connector uses high-strength steel bolts, which are fastened to the top flange of the steel beam with the aid of a special locking nut configuration that prevents bolts from slipping within their holes. Moreover, the connector promotes accelerated construction and overcomes the typical construction tolerance issues of precast structures. Most importantly, the connector allows bridge disassembly. Therefore, it can address different bridge deterioration scenarios with minimum disturbance to traffic flow including the following: (1) precast deck panels can be rapidly uplifted and replaced; (2) connectors can be rapidly removed and replaced; and (3) steel beams can be replaced, whereas precast decks and shear connectors can be reused. A series of push-out tests are conducted to assess the behavior of the connector and quantify the effect of important parameters. The experimental results show shear resistance, stiffness, and slip capacity significantly higher than those of welded shear studs along with superior stiffness and strength against slab uplift. Identical tests reveal negligible scatter in the shear load-slip displacement behavior. A design equation is proposed to predict the shear resistance with absolute error less than 8%.
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Accepted/In Press date: 8 March 2017
e-pub ahead of print date: 22 June 2017
Published date: September 2017
Organisations:
Infrastructure Group
Identifiers
Local EPrints ID: 408051
URI: http://eprints.soton.ac.uk/id/eprint/408051
ISSN: 1084-0702
PURE UUID: fff6c5ab-b9ea-402d-89d3-9f72db379523
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Date deposited: 10 May 2017 01:06
Last modified: 15 Mar 2024 13:38
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Contributors
Author:
Ahmed Suwaed
Author:
Theodore Karavasilis
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