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Structural Response of FRP Strengthened Post-Tensioned Concrete Beams

Author Affiliations

  • 1Department of Civil Engineering, B. S. Abdur Rahman University, Chennai, Tamilnadu, INDIA

Res. J. Recent Sci., Volume 3, Issue (ISC-2013), Pages 198-202, (2014)

Abstract

The paper presents the experimental results on the flexural behaviour of prestressed concrete (PSC) beams strengthened with externally bonded Fibre Reinforced Polymer (FRP) plates. The beam specimens used for this study were unbonded post-tensioned. The PSC beams were strengthened with Glass Fibre Reinforced Polymer (GFRP) plates with different configurations and thicknesses of 3 mm and 5 mm. The beams were tested under a static gradual loading up to failure to examine its flexural behaviour. The study parameters were ultimate load, ultimate deflection, ductility, failure mode and cracking pattern of the beams. The study showed that the UDCGFRP plates were found to be very effective in ultimate load carrying capacity, deflection and ductility when compared to other beams. The test results showed that the GFRP strengthened PSC beam increased its load carrying capacity by 89 % over the control beam. GFRP strengthened PSC beam showed an increase in ductility by 90% than the control beam. The PSC beam specimens failed either by crushing of concrete and by rupturing of FRP.

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