Effect of Interfacial Bond on Plastic Hinge Length of FRP-Confined RC Columns

Jiang, C, Yuan, F, Wu, Y and Zhao, X 2019, 'Effect of Interfacial Bond on Plastic Hinge Length of FRP-Confined RC Columns', Journal of Composites for Construction, vol. 23, no. 2, pp. 1-16.


Document type: Journal Article
Collection: Journal Articles

Title Effect of Interfacial Bond on Plastic Hinge Length of FRP-Confined RC Columns
Author(s) Jiang, C
Yuan, F
Wu, Y
Zhao, X
Year 2019
Journal name Journal of Composites for Construction
Volume number 23
Issue number 2
Start page 1
End page 16
Total pages 16
Publisher American Society of Civil Engineers
Abstract Structural retrofitting by wrapping with fiber reinforced-polymer (FRP) laminates can effectively increase the ductility of RC columns. The effect of the FRP-to-concrete interfacial bond on the behavior of FRP-confined RC columns has not yet been studied extensively. This paper reports on an experimental and numerical study of FRP-confined RC columns involving different bonding conditions between FRP and concrete. It was found that variations in the bonding condition do not have a significant effect on the global response of the FRP-confined RC columns. However, a detailed study of the plastic hinge zone indicated that slipping at the bond interface causes an adverse effect on the length of the plastic hinge zone. Mechanical anchoring to avoid interfacial slip can increase the plastic hinge length. The influence of the bond on the plastic hinge length was studied both analytically and numerically. Parametric studies based on finite-element analysis showed that the plastic hinge length first increases and then decreases as the amount of FRP increases, and a stronger interfacial bond offsets the decreasing trend of plastic hinge length at high FRP confinement.
Subject Structural Engineering
Keyword(s) Fiber-reinforced polymer (FRP)
Interfacial bond
Interfacial slip
Plastic hinge length
RC column
DOI - identifier 10.1061/(ASCE)CC.1943-5614.0000932
Copyright notice © 2019 American Society of Civil Engineers.
ISSN 1090-0268
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