Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5405
Title: Finite-element modeling of intermediate crack debonding in FRP-plated RC beams
Authors: Chen, GM
Teng, JG 
Chen, JF
Issue Date: Jun-2011
Source: Journal of composites for construction, June 2011, v. 15, no. 3, p. 339-353
Abstract: Intermediate crack-induced debonding (IC debonding) is a common failure mode of RC beams strengthened with externally bonded fiber-reinforced polymer (FRP) reinforcement. Although extensive research has been carried out on IC debonding, much work is still needed to develop a better understanding of the failure mode and a more reliable strength model. This paper presents an advanced finite-element (FE) model on the basis of the smeared-crack approach for predicting IC debonding failure. Existing FE models of the same type are generally deficient in capturing localized cracks (both their pattern and widths). This deficiency is overcome in the proposed FE model through the accurate modeling of interfaces between the concrete and both the internal steel and the external FRP reinforcements. The capability and accuracy of the proposed model are demonstrated through comparisons of its predictions with selected test results. The importance of accurate modeling of localized cracking is also explained using numerical results obtained from the FE model.
Keywords: Fiber-reinforced polymer
Reinforced concrete
Concrete beams
Cracking
Bonding
Interfaces
Shear stress
Strain distribution
Flexural strength
Finite-element method
Publisher: American Society of Civil Engineers
Journal: Journal of composites for construction 
ISSN: 1090-0268
EISSN: 1943-5614
DOI: 10.1061/(ASCE)CC.1943-5614.0000157
Rights: © 2011 American Society of Civil Engineers
This is the author’s version of a work that was accepted for publication in Journal of Composites for Construction. The open URL of the article: http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000157
Appears in Collections:Journal/Magazine Article

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