A Simple Method for the Determination of the Bond-Slip Model of Artificially Aged Joints
Publication: Journal of Composites for Construction
Volume 23, Issue 4
Abstract
The durability of adhesively bonded fiber-reinforced polymers (FRP) and concrete substrates has been the subject of recent studies. The degradation of bonded interfaces conjugated with other factors that affect the interface strength may compromise the potentialities of using FRP in externally bonded reinforced (EBR) concrete structures. However, the estimation of the effects of degradation on these bonded interfaces and the analytical methodologies to quantify them are not fully understood. The present work focuses on a local bond-slip model characterized by two parameters for which the values are obtained experimentally. Then, the determination of the local bond-slip relationship of a glass (G) FRP-to-concrete interface can be estimated. The assessment of the degradation of the bonded interface when subjected to cycles of (1) salt fog; (2) wet-dry environments with salt water; (3) temperatures between and ; and (4) temperatures between and is presented. The results obtained using the proposed bond-slip model led to the conclusion that after 10,000 h of exposure to temperature cycles between and , there was a small change in the GFRP-to-concrete interface performance, whereas the effects on the bonded interface for the specimens subjected to temperature cycles between and were far more most severe.
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Acknowledgments
The first author is grateful to Fundação para a Ciência e Tecnologia for partial financing of the work under the UNIDEMI Strategic Project PEst-OE/EME/UI0667/2014 and for his postdoctoral grant (Ref. No. SFRH/BPD/111787/2015).
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Published In
Journal of Composites for Construction
Volume 23 • Issue 4 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: May 25, 2018
Accepted: Jan 22, 2019
Published online: May 31, 2019
Published in print: Aug 1, 2019
Discussion open until: Oct 31, 2019
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