Corroded RC Beam Behavior Subjected to Random Loading in Various Pore Saturation Levels: Coupled Numerical Analysis
Year: 2022
Type: article
Abstract: Steel represents the majority of civil infrastructure.Corrosion is the principal source of structural degradation, primarily affected by the aggressive environment corrosion is a multiphysical process that occurs at the steel/electrolyte interface.This work presents a mechano-electrochemical coupling study of a corroded reinforced concrete (RC) beam subjected to section loss and a randomly varying load over time.A corrosion cell is created by connecting a zinc anode electrically to the RC beam system.This study uses numerical coupling techniques based on the mechanistic and kinetics of the corrosion process to evaluate the corrosion rate at different pore saturation degrees.The results reveal the impact of section loss on the RC beam displacement over time; as the crosssection reduces, the beam's ductility decreases, resulting in a yield and ultimate strength reduction.The moisture content effect on the electrochemical corrosion processes and oxygen diffusivity indicate that pore saturation levels are the primary determinant of the corrosion rate.The proposed numerical model explains the efficiency of coupled numerical analysis in the RC beam mechanical behavior assessment under corrosive conditions; the results include the concrete's porosity impact on the electrochemical corrosion process and the zinc anode contribution to steel corrosion protection.
DOI: 10.18280/acsm.460402
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4296514213