Constitutive Model for Time-Dependent Behavior of FRP–Concrete Interface
Publication: Journal of Composites for Construction
Volume 11, Issue 5
Abstract
A fundamental understanding of fiber-reinforced polymer (FRP) laminate bonding behavior, including bond strength and effective bonding length, is of primary importance for the development of design guidelines and codes for concrete structures strengthened with externally bonded FRP reinforcement as a bond-critical application. However, the long-term serviceability of such FRP-strengthened structures is still a concern due to a lack of both long-term performance data and a suitable model to represent these performances. This study aims at presenting a viscoelastic model describing the time-dependent behavior of the FRP–concrete interface. The proposed model has been calibrated using strain measurements of the designed specimen for the experimental investigation of the time-dependent behavior of the FRP–concrete interface, including the development of the effective bonding length. Afterward, the proposed model satisfactorily predicts the time-dependent bonding length of the FRP sheet in comparison with the experimental results. The effects, both of creep of the adhesive layer and of creep and shrinkage of the concrete, on the changes in the effective bonding length of the PFRP sheet are also discussed.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 5 • October 2007
Pages: 477 - 486
Copyright
© 2007 ASCE.
History
Received: Jan 3, 2006
Accepted: Feb 27, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
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