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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Debonding Behavior of Skew FRP-Bonded Concrete Joints
verfasst von : J. G. Dai, Y. B. Cao
Erschienen in: Advances in FRP Composites in Civil Engineering
Verlag: Springer Berlin Heidelberg
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In fibre reinforced polymer (FRP) shear-strengthened RC beams, the fiber orientation in FRP may not coincide with the crack opening direction of concrete (the pullout direction of FRP). FRP under such a stress condition is hereafter termed “skew FRP”. The issue of how to predict the bond strength between a concrete substrate and a skew FRP remains unsolved. This paper presents both experimental and predicted results on the pullout strength of FRP in a series of skew FRP-bonded concrete joints, in which the angle between the fibre orientation and the pullout direction of FRP varied from 0° to 45°. Both FRP plates and FRP sheets were used in the tests. It was found that the above-mentioned angle influences significantly the pullout strength of FRP, in other words, the debonding stress of fibers, due to the skew effects existing in the bond interface. Such effects should be appropriately considered particularly when evaluating the shear contribution of FRP in FRP shear-strengthened RC beams.