Recent developments in composite material technologies, with numerous new fibers and resin systems emerging in the construction industry, require not only a basic knowledge of the material properties of each new product but also their interfacial behavior when applied as external reinforcement. An experimental investigation was conducted on a series of modified push-apart concrete test specimens with bonded Carbon Fiber Reinforced Polymer (CFRP) sheets in order to study the bond behavior and failure mechanism of the CFRP sheets bonded to concrete. Five specimens were tested with CFRP sheets bonded to the sides of each specimen. The CFRP sheets have different width and bond length values. Strains in the CFRP sheets were measured at many locations to observe the bond stress distribution. The type and shape of failure for each specimen was recorded. Based on the experimental results, the effect of the bond length, and width of the sheet on the stress distribution is presented. The strain distribution along the width of the CFRP sheets is also investigated.
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