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Bond behavior of fiber reinforced polymer bars under direct pullout conditions

Achillides, Z. and Pilakoutas, K. (2004) Bond behavior of fiber reinforced polymer bars under direct pullout conditions. Journal of Composites for Construction, 8 (2). pp. 173-181. ISSN 1090-0268

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Abstract

This paper examines the behavior of Eurocrete fiber-reinforced polymer (FRP) bars (glass, carbon, aramid, and hybrid) in concrete under direct pullout conditions. More than 130 cube specimens were tested in direct pullout where no splitting was allowed to develop. In normal concrete, the mode of bond failure of FRP bars was found to differ substantially from that of deformed steel bars because of damage to the resin rich surface of the bar when pullout takes place. Bond strengths developed by carbon fiber-reinforced polymer and glass fiber-reinforced polymer bars appear to be very similar and just below what is expected from deformed steel bars under similar experimental conditions. The load slip curves highlight some of the fundamental differences between steel and FRP materials. This paper reports in detail on the influence of various parameters that affect bond strength and development such as the embedment length, type, shape, surface characteristics, and diameter of the bar as well as concrete strength. The testing arrangement is also shown to influence bond strength because of the “wedging effect” of the bars.

Item Type: Article
Copyright, Publisher and Additional Information: © 2004 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: Bonding strength, Fiber reinforced polymers, Bars, Concrete, Steel, Pull-out resistance
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 10:46
Last Modified: 08 Feb 2013 17:30
Published Version: http://dx.doi.org/10.1061/(ASCE)1090-0268(2004)8:2...
Status: Published
Publisher: American Society of Civil Engineers
Refereed: Yes
Identification Number: 10.1061/(ASCE)1090-0268(2004)8:2(173)
URI: http://eprints.whiterose.ac.uk/id/eprint/42820

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