CONCRETE CRACK MODELING DUE TO NONUNIFORM CORROSION USING SMEARED APPROACH

摘要

Numbers of researchers has been conducted the finite element analysis to predictcracks due to corrosion and assumed the corrosion as uniform expansive pressure.However,the analysis cannot reflect actual stress and crack occur in concrete. Thecorrosion volume could be bigger in several point at interface between concrete andsteel bar. This condition causes the concentrate stress and gives different response withthe uniform expansive pressure assumption. This study developed series of finiteelement model to study the crack propagation of the concrete due to non-uniformcorrosion. The analysis is conducted with Abaqus finite element program usedsmeared cracking approach. Reinforced concrete was modeled in 2D using the Zhaoexperiment at edge section. This paper also discusses the effect of usage a deformedreinforcement to the spread of rust and crack pattern. Based on this study,the result offinite element modeling shows fairly good agreement with experimental data. It alsoshows that the usage of deformed reinforcement affect the non-uniformities level of therust and cause the crack pattern at the concrete propagate differently compared withconcrete which use plain reinforcement.