Iris Publishers - Global Journal of Engineering Sciences (GJES)


Prediction of Deflection Progression of RC Beams Strengthened with NSM FRP Composites


Authorized by Tamer Eljufout




The deflection progression of Reinforced Concrete (RC) beams under cyclic loads gives a reliable indication of the accumulation of fatigue damages. Excessive increase in deflection raises a red flag for an immediate need for rehabilitation. This paper presents an analytical model for predicting the deflection evolution of RC beams strengthened with Near Surface Mounted (NSM) Fiber Reinforced Polymer (FRP) reinforcement. The model was validated based on experimental and numerical analyses. A three-dimensional strengthened RC beam was modeled using ANSYS software with similar dimensions and material properties of specimens that were experimentally tested. Numerical simulations were performed for the RC beam under constant amplitude cyclic loads. The analytical model predicted the increase in deflection due to the cyclic creep of concrete during the fatigue life of RC beams. A satisfactory correlation and consistency were noticed between the numerical and analytical predictions with a mean error of deflection less than 9.5%.

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