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Advances in Concrete Construction Volume 2, Number 1, March 2014 , pages 057-75 DOI: https://doi.org/10.12989/acc.2014.2.1.057 |
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Failure mechanisms of hybrid FRP-concrete beams with external filament-wound wrapping |
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A. Chakrabortty and A. Khennane
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| Abstract | ||
| This paper presents an analysis of the results of an experimental program on the performance of a novel configuration of a hybrid FRP-concrete beam. The beam section consists of a GFRP pultruded profile, a CFRP laminate, and a concrete block all wrapped up using filament winding. It was found that the thickness of the concrete block and the confinement by the filament-wound wrapping had a profound effect on the energy dissipation behaviour of the beam. Using a shear punching model, and comparing the predicted results with the experimental ones, it was found that beyond a given value of the concrete block thickness, the deformational behaviour of the beam shifts from brittle to ductile. It was also found that the filament-wound wrap had many benefits such as providing a composite action between the concrete block and the GFRP box, improving the stiffness of the beam, and most importantly, enhancing the load carrying ability through induced confinement of the concrete. | ||
| Key Words | ||
| high strength concrete;steel fibers;finite element analysis (FEA); hybrid beam, pultrusion; filament winding | ||
| Address | ||
| A. Chakrabortty and A. Khennane: School of Engineering and Information Technology, UNSW Canberra, Northcott Drive, Canberra , Australia | ||
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