Numerical Analysis of Interfacial Bond Behavior of Externally Bonded FRP-to-Concrete Joints
Publication: Journal of Composites for Construction
Volume 20, Issue 5
Abstract
Due to the complexity and difficulty involved, the interfacial bond-slip relationship of externally bonded (EB) fiber-reinforced polymer (FRP)-to-concrete joints has been investigated, mainly through experimental testing. This work investigates the interfacial behavior using the finite-element method (FEM). Damage plasticity theory is employed to model concrete material and the pull-off test of EB-FRP-to-concrete joints is simulated by FEM to study the interfacial behavior. Debonding process, failure mechanism, local bond strength distribution, and characteristics of the local bond-slip relationship are examined. It is found that the local bond-slip relationship has a shape different from all existing bond-slip models. However, such change in shape does not make a significant difference to the global interfacial load-slip response.
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Acknowledgments
The work described in this paper was fully supported by Research Grant Council, Hong Kong Special Administrative Zone, China (Project No. CityU124113) and the National Natural Science Foundation of China (Grant No. 51378449).
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© 2016 American Society of Civil Engineers.
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Received: Sep 25, 2015
Accepted: Dec 10, 2015
Published online: Mar 10, 2016
Discussion open until: Aug 10, 2016
Published in print: Oct 1, 2016
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