Numerical and analytical models of RC beams with corroded compression reinforcement

Abstract

This paper presents a Finite Element Analysis (FEA) model and an analytical model to estimate the ultimate flexural strength of Reinforced Concrete (RC) beams with corroded compression bars. Both models account for the deteriorated material properties and geometry. The above models were verified against the available experimental data, and showed good agreement. The analytical model was employed to study the effects of corrosion length, corrosion level, concrete compressive strength, and concrete cover on the ultimate flexural strength of RC beams. Over 670 cases were investigated to estimate the influence of the above variables on the ultimate flexural strength of reinforced concrete beam with corroded compression steel reinforcement. The result of this investigation suggests that corrosion of compression steel reinforcement leads to a maximum flexural strength reduction of 20 percent, in which roughly 15 percent is due to the spalling of the concrete cover on the compression side of the cross-section.