A Review of RC Beams Strengthened for Flexure, Shear and Torsion Loading

This paper is intended to review existing literature related to RC beams strengthened for flexure, shear and torsion in order to better understand the behaviour. Review of literature shows that strengthening of RC beams using Carbon Fibre Reinforced Polymers (CFRP) are the most widely and suitable strengthening technique. Moreover, behaviour of RC beams subjected to under torsion, flexure and shear individually as well as in combination of flexure-shear has been widely studied till date. Strengthening of RC beams exhibiting these behaviours is also discussed in detail which shows that number of CFRP strips improve flexural strength whereas inclined CFRP wraps are best suitable to improve shear and torsion behaviour. However combine effects of all behaviours i.e. torsion, flexural and shear have not been together studied so far. Moreover, there is no suitable strengthening technique for RC beams that exhibit these behaviours. Therefore, it can be concluded that there is an opening for researchers to explore this domain.