Engineering failure analysis of corroded R.C. beams in flexure and shear. (April 2018) - Campione, G.
Abstract: In the present paper, a simple model to reproduce the load-deflection response of corroded beams failing in flexure and shear is presented and discussed. Effects of diffused and pitting corrosion on steel bars, compressive concrete strength degradation and concrete bond strength degradation due to rust formation are included in the model. Engineering approach based on limit state theory was here adopted to predict the peak and the residual flexural and shear strength of corroded beams with corresponding deflections and ductility estimation. Calculation of deflection at cracking taking into account of rust formation and deflection at yielding and the ultimate state taking into account also of slippage of steel bars due to rust formation were made. The model was also widely verified against tests available in the literature referred to crack opening, pit depth, attach corrosion penetration, load-deflection curves. Highlights: Experimental versus analytical prediction of effects of general and pitting corrosion on steel bars Experimental versus analytical prediction of effects of general and pitting corrosion on R.C. cross-section if flexure Experimental versus analytical prediction of effects of general and pitting corrosion on R.C. beams in shear Case of study for strength and ductility degradation in flexure and shear of R.C. beams under natural corrosion scenarios