Study on Torsional Behaviour of RC Flanged Beams Strengthened with Glass FRP

Abstract

Existing structures needs repair and rehabilitation due to Environmental deterioration, increased service loads, reduced capacity due to aging, deterioration owing to poor construction materials and workmanships and conditional need for seismic agitating. FRP has been used successfully in a large number of such uses for causes like low weight, high strength and durability. Many previous research works on torsional strengthening were focused on solid rectangular RC beams with different strip layouts and different types of fibres. Various analytical models were progressive to estimate torsional behavior of strengthened rectangular beams and successfully used for validation of the experimental works. But literature on torsional strengthening of RC T-beam is limited. In the period of now occurring work exploratory study was conducted in order to have a better understanding the behaviour of torsional strengthening of solid RC flanged T-beams. An RC T-beam is analysed and considered for torsion like an RC rectangular beam; the effect of concrete on flange is abandoned by codes. In the concerning study effect of flange part in resisting torsion is studied by changing flange width of expelled beams. The other parameters studied are strengthening configurations and fibre orientations. The aim of present paper is to estimate the worth of the use of epoxy-bonded GFRP fabrics as external on the cross reinforced to reinforced concrete beams with flanged cross sections (T-beam) subjected to torsion. Torsional results from strengthened beams are compared with the experimental result of the control beams without FRP application. The current study discusses the unresolved development in torsional behaviour of all the GFRP strengthen beams. The experimentally obtain results are validated with analytical model presented by Deifalla and Ghobarah and found in good agreement.