Bond-Slip Constitutive Relationships of the CFRP/Concrete Interface

Abstract:

In consideration of the light weight, high strength, corrosion resistance and construction is convenient of carbon fiber reinforced polymer (CFRP), using CFRP to strengthen structure is becoming more and more widely. However, there is no commonly accepted understanding of the constitutive relationship of the bonding shear stress and slip between concrete and CFRP bonded interface, especially the decline of the constitutive relation is more difficult to measure accurately. An aim of this paper is to improve the experiment to explore bond stress and slip (τδ) constitutive relation of the bonding interface, strive for the experiment to measure the τδ constitutive relation curve of CFRP-concrete interface. Double pull test was proposed with the improved specimen, using the horizontal load, eliminate additional bending moment influence and improve the experimental accuracy. 17 specimens were tested to measure the τδ curves, according to the features of the constitutive relation curves, the mechanical characteristics of the bonding interface was further analysised.

• Periodical: Advanced Materials Research (Volume 900)
• Pages: 426-429
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.900.426
• Online since: February 2014
• Authors: Xiao Yong Wu*, Hui Wang
• Keywords: Bidirectional-Pull Specimens, Bond-Slip, CFRP, Concrete, Constitutive Relationships

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