A Comparative Study between the Analytical and Experimental Deflection Response of Corroded Simply Supported Reinforced Concrete Beams

This paper involves a comparative experimental and analytical investigation on the deflection behavior of corroded reinforced concrete simply supported beams. For this aim, two beams specimens of different dimensions are subjected to a lab-controlled environment to stimulate the effect of corrosion on their deflection values and two other beams of the same dimensions are kept intact as control beams. The impressed current technique is used for accelerating corrosion in beams for different periods of exposure. This has led to a different amount of corrosion in each beam. The load deflection variation of all the corroded and control beams is represented next when all beams are tested for bending until failure. On a parallel hand, an analytical attempt is run to determine the load deflection behavior using a simple mathematical modeling. The analytical approach involves the use of the modified deflection equations taking into account the amount of corrosion induced, the degradation in bond strength, and the resulting slippage effect in the beam. In both approaches, the corrosion phenomenon is shown to clearly affect the deflection behavior of the reinforced concrete beam. It is also noticed that a good agreement is achieved when identifying the analytical deflection value in simply supported reinforced concrete corroded beams in compare to the experimental acquired ones with some restrictions.