Behaviour of GFRP Wrapped RC Columns under Axial Compression

Abstract

Retrofitting to the RC columns used to increase its strength, ductility and stiffness. For this most recent method is using of fiber reinforced polymer sheets. The external GFRP confinement to the RC members has become a more efficient and very convenient method. This type of external bonding of reinforced polymers becomes popular for infrastructure applications. The existed many short RC columns are vulnerable mainly to failure in brittle and shear nature. This type of failure demonstrated during the seismic events. So, It is becoming more important to find out the behaviour of short RC columns and making retrofit to them. The objective of this present study mainly focused on the finding of the effectiveness of gfrp retrofitting to RC columns and to evaluate the performance improvement of prefailure columns after gfrp confinement externally. For strengthening the RC columns Chopped strand mat type of
Glass fiber polymer was used. It was found experimentally that there is a possibility to enhance the resistance of brittle failure of columns by making retrofit and effective in increasing the load carrying capacity of short columns.