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Materials 2015, 8(2), 435-450; doi:10.3390/ma8020435

Modeling and Measurement of Sustained Loading and Temperature-Dependent Deformation of Carbon Fiber-Reinforced Polymer Bonded to Concrete

1
Department of Civil Engineering, Chungnam National University, Daejeon 305-764, Korea
2
Department of Civil Engineering, Korea Maritime and Ocean University, Busan 606-794, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Luciano Feo
Received: 3 December 2014 / Revised: 11 January 2015 / Accepted: 19 January 2015 / Published: 29 January 2015
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Abstract

This paper aims at presenting the effects of short-term sustained load and temperature on time-dependent deformation of carbon fiber-reinforced polymer (CFRP) bonded to concrete and pull-off strength at room temperature after the sustained loading period. The approach involves experimental and numerical analysis. Single-lap shear specimens were used to evaluate temperature and short-term sustained loading effects on time-dependent behavior under sustained loading and debonding behavior under pull-off loading after a sustained loading period. The numerical model was parameterized with experiments on the concrete, FRP, and epoxy. Good correlation was seen between the numerical results and single-lap shear experiments. Sensitivity studies shed light on the influence of temperature, epoxy modulus, and epoxy thickness on the redistribution of interfacial shear stress during sustained loading. This investigation confirms the hypothesis that interfacial stress redistribution can occur due to sustained load and elevated temperature and its effect can be significant. View Full-Text
Keywords: debonding; externally bonded; fiber-reinforced polymer; stress redistribution; creep; temperature debonding; externally bonded; fiber-reinforced polymer; stress redistribution; creep; temperature
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jeong, Y.; Lee, J.; Kim, W. Modeling and Measurement of Sustained Loading and Temperature-Dependent Deformation of Carbon Fiber-Reinforced Polymer Bonded to Concrete. Materials 2015, 8, 435-450.

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