Moment-curvature and strain energy of beams with external fiber-reinforced polymer reinforcement


Achintha, Mithila and Burgoyne, Chris J. (2009) Moment-curvature and strain energy of beams with external fiber-reinforced polymer reinforcement. ACI Structural Journal, 106, (1), 20-29.

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Description/Abstract

To calculate the load at which fiber-reinforced polymer (FRP) plates will debond from a reinforced concrete (RC) beam using fracture mechanics principles based on energy release rates, it is necessary to accurately determine the strain energy in the beam. This study presents a moment-curvature model for an RC beam with the presence of a net axial force that is due to the force in the FRP plate. The classical Branson analysis only covers the case of a cracked-elastic concrete beam with no axial force. The paper shows how the model can be extended into the inelastic regime and can be used to determine the moment-curvature relations on loading. Comparisons with the available test data have shown good correlation. The model is then extended into an unloading regime for the strain energy determinations of RC beams with external reinforcement, which may be bonded or partially debonded.

Item Type: Article
ISSNs: 0889-3241 (print)
Related URLs:
Keywords: Branson’s model, elastic stiffness, moment-curvature, strain energy
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering and the Environment > Civil, Maritime and Environmental Engineering and Science > Infrastructure Research Group
ePrint ID: 209477
Date Deposited: 30 Jan 2012 11:24
Last Modified: 27 Mar 2014 19:50
URI: http://eprints.soton.ac.uk/id/eprint/209477

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