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A fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams

A fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams
A fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams
A Fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams is presented. The conventional methods of concrete-FRP interface analysis use finite element models, which require details of unknown and unknowable interface characteristics. The present model assumes flaws in the vicinity of the interface and assesses whether sufficient energy can be released to cause these flaws to propagate. Energy released by an extension of an existing flaw depends on the change of recoverable energy stored in the system. This paper concentrates on the moment-curvature model for a cracked reinforced-concrete beam under a prestress caused by the force in a FRP plate. The use of the proposed model to determine the energy released from the system with the extension of an existing flaw is also presented. The energy required to create the associated new surfaces depends on interface fracture energy which is first reviewed and methods to determine is also discussed.
concrete beams, flexural-strengthening, fracture-energy, interface-debonding, moment-curvature, strain energy
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
Burgoyne, C.
5a90ba6f-f862-48b8-8273-f44b18bbb2dd
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
Burgoyne, C.
5a90ba6f-f862-48b8-8273-f44b18bbb2dd

Achintha, M. and Burgoyne, C. (2006) A fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams. 10th East Asia-Pacific Conference on Structural Engineering and Construction, Thailand. 03 - 05 Aug 2006. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

A Fracture-mechanics model for debonding of external fibre reinforced polymer plates on reinforced concrete beams is presented. The conventional methods of concrete-FRP interface analysis use finite element models, which require details of unknown and unknowable interface characteristics. The present model assumes flaws in the vicinity of the interface and assesses whether sufficient energy can be released to cause these flaws to propagate. Energy released by an extension of an existing flaw depends on the change of recoverable energy stored in the system. This paper concentrates on the moment-curvature model for a cracked reinforced-concrete beam under a prestress caused by the force in a FRP plate. The use of the proposed model to determine the energy released from the system with the extension of an existing flaw is also presented. The energy required to create the associated new surfaces depends on interface fracture energy which is first reviewed and methods to determine is also discussed.

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More information

Published date: 4 August 2006
Venue - Dates: 10th East Asia-Pacific Conference on Structural Engineering and Construction, Thailand, 2006-08-03 - 2006-08-05
Keywords: concrete beams, flexural-strengthening, fracture-energy, interface-debonding, moment-curvature, strain energy
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 369136
URI: https://eprints.soton.ac.uk/id/eprint/369136
PURE UUID: 0401461c-e4e8-443c-b364-4381070d313c

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Date deposited: 25 Sep 2014 13:47
Last modified: 18 Jul 2017 01:40

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