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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
 


Failure mechanisms of hybrid FRP-concrete beams with external filament-wound wrapping
A. Chakrabortty and A. Khennane

 
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
 
References
    -acc0201005-
 

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