Numerical Analysis Of Rc Circular Column To Enhance The Compressive Strengt With Cfrp

Abstract

This research numerically represents the technique of increasing compressive strength of reinforced concrete (RC) column using Carbon fiber reinforced polymer (CFRP) under pure compressive load. Many researchers worldwide have extensively used fiber reinforced polymer (FRP) strengthening materials to enhance the shear and flexural strengths of reinforced concrete RC columns. However, studies on compressive strengthening are limited. FRP laminate can be used as external reinforcement for the reintegration of RC structures and due to their high tensile strength and corrosion resistance, they are preferable over steel plates. This study aims at demonstrating the behavior of RC columns under pure compressive loading with CFRP sheets with different configurations. Total 3 columns are modeled with the dimension of 250mm diameter and 1220mm length. One of them is performed as a control column and others are configured with different orientations of FRP sheets which are: fully wrapped, wrapped strips. Ultimate load, Displacement and cracking patterns has been measured from the numerical analysis. It is seen that CFRP performed better to increase the compressive strength compared to the control column. Fully CFRP wrapped column has increased the ultimate load-carrying capacity and ductility by about 179.08 % and 525.06 %. Finally, these results have been validated with the experimental result available in the literature. Numerical study has been carried out by using Finite Element Software, ABAQUS to bring into focus the versatility and powerful analytical capabilities of finite element techniques by objectively modeling the complete response of columns