ANALYSIS OF COMPOSITE BEAM USING ANSYS

Jayalin.D, Prince Arulraj. G, Karthika.V

Abstract: A Finite Element (FEM) model has been developed using Ansys 15 to analyse beams with openings. The openings in beams are provided for utility ducts and pipes. The cracks normally develop due to the stress concentration around the openings. In this paper, beams strengthened by Carbon Fibre Reinforced Polymer (CFRP) and Glass Fibre Reinforced Polymer (GFRP) Concrete sheets were studied. The concrete was modelled using solid 65 element and rebars were modelled using beam 188 elements. Thirteen beams were modelled, one beam is the reference reinforced concrete beam without any opening. Six beams with openings retrofitted with CFRP fibres and six beams with opening retrofitted with GFRP were also analysed. From the analysis, the load deflection relationship, crack pattern and crack at ultimate load were obtained and comparison was done for CFRP and GFRP beams. From the load deflection relationship, it was found that the performance of beams retrofitted with CFRP was better than that of the beams retrofitted with GFRP. The strengthening with CFRP and GFRP around and inside the opening was found more effective in improving the ultimate load carrying capacity of beams.

Keywords: Reinforced concrete beam, CFRP, GFRP, Load carrying capacity

DOI: https://doi.org/10.15623/ijret.2015.0421003