In recent years, the use of externally bonded fiber-reinforced polymers (FRP) has become increasingly popular for civil
infrastructure applications. The Glass fiber reinforced polymer has significantly enhanced the strength and ductility of
concrete by forming perfect adhesive bond between concrete and the wrapping material. Present experimental investigation
mainly emphasises on effectiveness of external GFRP strengthening for RC Columns of circular, square and rectangular
shapes having same cross sectional area. Total 15 RC columns of 1 meter in height were cast. 9 columns were control and
the rest 6 columns were strengthened with one layer of GFRP wrap having 20mm of corner radius. Columns were designed
using IS: 456:2000 provisions. Design of GFRP wrapping was done using ACI 440.2R.08 provisions. All the test specimens
were loaded to fail in axial compression and strain of the columns in the axial direction was investigated. The test results
clearly demonstrated that the axial load carrying capacity increases from rectangular to square to circular shape of confined
RC columns. No major impact on axial compressive strength is observed due to variation in shape for control columns, on
the other hand, quite opposite behaviour was observed in case of RC columns confined by GFRP. GFRP wrapped circular
column undergone more axial deformation as compared to that of square and rectangular columns. Stress-strain behaviour
revealed that the strength gained from FRP confinement was prominent for circular columns. Square and rectangular-section
columns are found to experience lesser increment in strength as compared to that of circular columns. This behaviour may
be attributed to variation in lateral confining pressure distribution for rectangular columns from a maximum at the corners to
a minimum in between, which is in contrast to even confining pressure observed for circular columns in order to achieve the
full confinement effect.