Cyclic response of high strength fibre reinforced concrete beams with fibre reinforced polymer (FRP) laminates

Abstract

This paper assesses the cyclic response of high strength concrete beams with externally bonded GFRP laminates reinforced by steel fibre. For the current research work a total of six rectangular beams have been casted. In the preliminary we are used three different percentage of steel fibre 0.5%, 1% and 1.5% from the different tests are conducted in laboratory we were find out the optimum as 1%. One of the beam was worked as control beam as well as the other five have been provided with the steel fibres of having 1% in volume fraction in that 4 beams laminated of 3 mm and 5 mm thickness of CSMGFRP and UDCGFRP. The beams in the cross-section were 150 mm × 250 mm, and 3000 mm long. The beams were tested over a span of 2800 mm, in four-point bending. Under monotonically increasing loading, one beam has been tested and manual readings have been recorded directly in a spreadsheet programme from that load range was fixed from the static ultimate load of the control beam fmin 20% and fmax 60%.The test specimens were subjected to sinusoidal loading at a frequency of 2 Hz. The remaining five beams are test under cyclic loading have been tested and readings have been recorded directly by using MTS793 Flextest software. Adequate data has been collected upon its deformation, strength, fatigue life and failure properties of high-strength concrete beams reinforced with GFRP laminates, and also high-strength concrete beams reinforced with steel fibre. The analysis approaches adopted with this research work comprised sufficient information on deflection, number of cycles, rigidity, number of cracks, crack duration, average crack spacing, energy absorption and failure characteristics for high-strength concrete beams reinforced with externally bonded GFRP laminates under cyclic loading. The findings of the tests performed are thoroughly explained and analyzed.