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Prediction of FRP debonding Using the global-energy-balance approach

Prediction of FRP debonding Using the global-energy-balance approach
Prediction of FRP debonding Using the global-energy-balance approach
A major research program was carried out to analyze the mechanism of FRP debonding from concrete beams using global-energy-balance approach (GEBA). The key findings are that the fracture process zone is small so there is no R-curve to consider, failure is dominated by Mode I behavior, and the theory agrees well with tests. The analyses developed in the study provide an essential tool that will enable fracture mechanics to be used to determine the load at which FRP plates will debond from concrete beams. This obviates the need for finite element (FE) analyses in
situations where reliable details of the interface geometry and crack-tip stress fields are not attainable for an accurate analysis. This paper presents an overview of the GEBA analyses that is described in detail elsewhere, and explains the slightly unconventional assumptions made in the analyses, such as the revised moment-curvature model, the location of an effective centroid, the separate consideration of the FRP and the RC beam for the purposes of the analysis, the use of Mode I fracture energies and the absence of an R-curve in the fracture mechanics analysis.
Burgoyne, C.
5a90ba6f-f862-48b8-8273-f44b18bbb2dd
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
Guan, G.
7058eaf4-1eed-46fc-8e38-592a93acd03a
Burgoyne, C.
5a90ba6f-f862-48b8-8273-f44b18bbb2dd
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
Guan, G.
7058eaf4-1eed-46fc-8e38-592a93acd03a

Burgoyne, C., Achintha, M. and Guan, G. (2012) Prediction of FRP debonding Using the global-energy-balance approach. Special Session at ACI 2012 Spring Convention on Fracture Mechanics Applied to FRP Debonding, United States. 18 - 22 Mar 2012.

Record type: Conference or Workshop Item (Other)

Abstract

A major research program was carried out to analyze the mechanism of FRP debonding from concrete beams using global-energy-balance approach (GEBA). The key findings are that the fracture process zone is small so there is no R-curve to consider, failure is dominated by Mode I behavior, and the theory agrees well with tests. The analyses developed in the study provide an essential tool that will enable fracture mechanics to be used to determine the load at which FRP plates will debond from concrete beams. This obviates the need for finite element (FE) analyses in
situations where reliable details of the interface geometry and crack-tip stress fields are not attainable for an accurate analysis. This paper presents an overview of the GEBA analyses that is described in detail elsewhere, and explains the slightly unconventional assumptions made in the analyses, such as the revised moment-curvature model, the location of an effective centroid, the separate consideration of the FRP and the RC beam for the purposes of the analysis, the use of Mode I fracture energies and the absence of an R-curve in the fracture mechanics analysis.

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More information

Published date: 18 March 2012
Venue - Dates: Special Session at ACI 2012 Spring Convention on Fracture Mechanics Applied to FRP Debonding, United States, 2012-03-18 - 2012-03-22
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 369126
URI: https://eprints.soton.ac.uk/id/eprint/369126
PURE UUID: ee51b877-8e1e-4564-aa1e-7984b5ffddf9
ORCID for M. Achintha: ORCID iD orcid.org/0000-0002-1732-3514

Catalogue record

Date deposited: 25 Sep 2014 13:59
Last modified: 13 Jun 2019 00:32

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