Abstract
This paper aims to study the effect of external glass fibre reinforced
polymer (GFRP) plates on the flexural and shear behaviour of structurally
deficient reinforced concrete (RC) beams, a total of ten 180mmГ—250mmГ—2,500mm
beams, including over-designed, unplated under-designed and plated
under-designed, were tested under four-point bending condition. Experimental
results indicate that the use of GFRP plates enhances the strength
and deformation capacity of RC beams by altering their failure modes.
Application of side plates on shear-deficient RC beams appears to
be more effective than using bottom plates on flexure-deficient RC
beams. However, without any improvement of concrete compressive capacity,
additional shear capacities provided to the beams under the action
of side plates increase the likelihood of beam failure by concrete
crushing. Simultaneous use of bottom and side plates on flexural-
and shear-deficient RC beams may result in reduced deflection.
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