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A Comparison between Strengthened CFRP and GFRP laminated RC Beam: Finite Element Approach

Md.Fazla Rabbi Anik, Md. Mehedi Hassan Asif, Saima Hannan Raha, Dr.Sharmin Reza Chowdhury

Abstract


This paper represents a numerical analysis between the performance of Strengthened and Un-strengthened Reinforced concrete beams using Carbon fiber reinforced polymer (CFRP) and Glass fiber reinforced polymer (GFRP). Nowadays, the demand of strengthening or retrofitting of existing structures is increasing because of its sustainability but more challenging for engineers to apply it. FRP laminate can be used as an external reinforcement for the reintegration of RC structures and due to their high tensile strength and corrosion resistance, they are more preferable over steel plates. In particular, the load-carrying capacities of an RC beam can be increased by using CFRP,GFRP, and AFRP plates/sheets adhesively bonded to the tension face of the beam. Three sets of beams (150x300x2000 mm) such as the control beam, CFRP laminated strengthened beam and GFRP laminated strengthened beam have been numerically analyzed in this study to compare their ultimate load carrying capacities, 1st cracking loads, reduction of displacements, and ductility indexes. The results indicate that CFRP laminated beam has a higher load carrying capacity than that of Control and GFRP laminated beams. Deflection at ultimate loading decreases for CFRP laminated beam than that of other beams. Crack patterns at the ultimate load are also predicted from numerical analysis. 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 beams.


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References


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