Strengthening of R.C. Beam using Carbon Fibre to Study its Torsional Behaviour

Using ANSYS software and experimental work to study torsional behavior of carbon fiber after restrenthening RC beams of M30 grade of concrete, is presented in this paper. Fully wrapped carbon fiber around the RC beams and strips of carbon fiber wrapped at an angle 90° and 45° around the RC beams are the different patterns studied experimentally and analytically. Carbon fiber worked as an external reinforcement. RC beam strengthened with carbon fiber tested for torsional failure; in which lever arms subjected to torque were used. The beam size is 150 mm x 300 mm and of 1.3m in length, designed as per IS456-2000. Three beams are designed for torsion and the twelve beams designed as normal beams in which nine beams are strengthened using different patterns of unidirectional carbon fiber having same properties, to study its torsional behavior. In this experimental work carbon fiber and carbon fiber strips of width 100 mm on all face of beam with 900 and 450 orientations with the longitudinal axis of beam were sticked by using epoxy resin. The effect of different types and configuration of carbon fiber on first crack load, ultimate load carrying capacity and failure mode of the beams were taken into consideration and its study using ANSYS software gives better result for further study.