Title: Modeling Corrosion-Damaged Reinforced Concrete Members

Author(s): Siavash Habibi, Anca C. Ferche, and Frank J. Vecchio

Publication: Structural Journal

Volume: 119

Issue: 1

Appears on pages(s): 169-182

Keywords: corrosion; finite element analysis; pitting corrosion; reinforced concrete; stochastic analysis; uniform corrosion

DOI: 10.14359/51733011

Date: 1/1/2022

Abstract:
In this paper, an analytical approach developed for the structural assessment of corrosion-damaged reinforced concrete (RC) structures is presented. The proposed method, suited for finite element analysis, is compatible with smeared rotating crack models and accounts for uniform and pitting corrosion. Modeling corrosion damage involves accounting for the reduction of the cross-sectional area of reinforcement, bond strength degradation between the reinforcement and concrete, deterioration of the reinforcement mechanical properties, and cracking of concrete in the vicinity of the corroded reinforcement. Numerical models and techniques for simulating corrosion damage were incorporated within the algorithms of a nonlinear finite element analysis program. Validation studies successfully reproduced the responses of published experiments on corroded RC beams. Stochastic simulations were also performed, demonstrating the sensitivity of response quantities to changes in various input parameters. The statistics of the response quantities can also be used for reliability analysis by employing methods such as the first-order reliability method.