Behaviour of reinforced concrete beams bonded with side bonded FRP sheets

• Main Authors: Sai Krishna, M, Sandeep Kumar, G.A.V.S, Cyril Thomas, A
• Format: Conference Proceeding
• Language: English
• Subjects: ABAQUS models; Finite element modelling; Flexural strengthening; GFRP; Side bonding technique
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2021.02.140

Fibre reinforced polymer systems which are externally bonded to the reinforced concrete beams are often used for strengthening. One of the main applications is to bond the externally bonded fibre reinforced systems to the soffit of the beam which helps in improving the reinforced concrete beams’ bending capacity. Though it achieves strength and bending capacity, there are few exceptional cases such as existing structural components or RC beam spans over neighbouring members. In such cases, to overcome these exceptions, longitudinal bonding of Externally Bonded Fibre Reinforced Polymers (EB-FRP) system is used at the sides of the beam’s web to increase the strength. This paper studies the important parameters that effects the side bonded EB-FRP systems created through an ABAQUS FE model. This prototype has the capacity to track the flexural behaviour of RC beams that are enhanced externally with side bonded EB-FRP laminates from loading stage until the beam fails. Experimental studies are done to compare the results with the simulation model and the obtained results and predicted results are comparable. Using the simulated model, studies were done on FRP material type, compressive strength of concrete and FRP size on RC beams. Numerical study outcomes concludes that for improving flexural capacity of the beams, efficiency and compatibility of side bonded FRP systems can be used as an alternate option for conventional beam strengthening systems.