Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/23062
Title: Intermediate crack-induced debonding in RC beams externally strengthened with prestressed FRP laminates
Authors: Wang, WW
Dai, JG 
Harries, KA
Issue Date: 2013
Source: Journal of reinforced plastics and composites, 2013, v. 32, no. 23, p. 1842-1857
Abstract: Intermediate crack-induced debonding is often a dominant failure mode in fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams in flexure. It has been extensively studied for RC beams externally strengthened with unstressed FRP laminates. However, very little work has been done on FRP debonding for RC beams strengthened with prestressed FRP. This article presents a sectional analysis model for predicting the flexural capacity of RC beams strengthened with prestressed FRP laminates with due consideration of different failure modes. The focus is placed on the effective strain in the prestressed FRP at the ultimate states of intermediate crack-induced debonding or rupture of debonded FRP. Through back-calculation analysis of 51 RC beams strengthened with post-tensioned FRP laminates, a model for predicting the effective strain of prestressed FRP for ultimate strength prediction based upon sectional analyses was developed and validated through comparisons with test results.
Keywords: Fiber-reinforced polymer rupture
Flexural strengthening
Intermediate crack-induced debonding
Prestressed fiber-Reinforced polymer
Reinforced concrete beams
Publisher: SAGE Publications
Journal: Journal of reinforced plastics and composites 
ISSN: 0731-6844
EISSN: 1530-7964
DOI: 10.1177/0731684413492574
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