An experimental investigation of RCC beams with rounded rectangular opening strengthened by different FRP laminates

Abstract: This paper presents the review of studies performed to investigate the behaviour of Reinforced Concrete (RC) beams containing rounded rectangular kind of opening. Fibre-reinforced polymers (FRP) have emerged as promising material for rehabilitation of existing reinforced concrete structures. The rehabilitation of structures can be in the form of strengthening, repairing or retrofitting for any type of deficiencies. RC rectangular-section is the most common shape of beams and girders in buildings and bridges. In this experimental study 5 beams were casted, one beam without opening as a control beam and the remaining beams were provided with opening. These beams were tested under four-point loading. From the test results, its concluded that the presence of an aperture does not affect the appearance of the first fracture on beams. By allowing a hole in the beam, on average 7% of concrete may be saved, thus lowering the weight of the beam and the stress it places on the foundation. And from Load vs deflection curve it can be observed that beams sheathed with CFRP behaves similar to that of reference/solid beam.

Keywords: RC beam, opening, CFRP, Flexure strength.