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Punching shear behavior of fiber reinforced polymers reinforced concrete flat slabs: experimental study

El-Ghandour, A. W., Pilakoutas, K. and Waldron, P. (2003) Punching shear behavior of fiber reinforced polymers reinforced concrete flat slabs: experimental study. Journal of Composites for Construction, 7 (3). pp. 258-265. ISSN 1090-0268


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This paper presents the results of a two-phase experimental program investigating the punching shear behavior of fiber reinforced polymer reinforced concrete (FRP RC) flat slabs with and without carbon fiber reinforced polymer (CFRP) shear reinforcement. In the first phase, problems of bond slip and crack localization were identified. Decreasing the flexural bar spacing in the second phase successfully eliminated those problems and resulted in punching shear failure of the slabs. However, CFRP shear reinforcement was found to be inefficient in enhancing significantly the slab capacity due to its brittleness. A model, which accurately predicts the punching shear capacity of FRP RC slabs without shear reinforcement, is proposed and verified. For slabs with FRP shear reinforcement, it is proposed that the concrete shear resistance is reduced, but a strain limit of 0.0045 is recommended as maximum strain for the reinforcement. Comparisons of the slab capacities with ACI 318-95, ACI 440-98, and BS 8110 punching shear code equations, modified to incorporate FRP reinforcement, show either overestimated or conservative results.

Item Type: Article
Copyright, Publisher and Additional Information: © 2003 ASCE. This is an author produced version of a paper subsequently published in Journal of Composites for Construction. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Punching, Fiber reinforced polymers, Slabs, Shear strength
Institution: The University of Sheffield
Academic Units: The University of Sheffield > University of Sheffield Research Centres and Institutes > Centre for Cement and Concrete (Sheffield)
The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield)
Depositing User: Prof Kypros Pilakoutas
Date Deposited: 31 Jan 2011 11:20
Last Modified: 08 Feb 2013 17:30
Published Version: http://dx.doi.org/10.1061/(ASCE)1090-0268(2003)7:3...
Status: Published
Publisher: American Society of Civil Engineers
Refereed: Yes
Identification Number: 10.1061/(ASCE)1090-0268(2003)7:3(258)
URI: http://eprints.whiterose.ac.uk/id/eprint/42822

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