Expansion of rust, as a result of reinforcement corrosion, can cause additional internal expansive pressure and initiate cracking to the concrete. This paper presents experimental test and numerical modeling of concrete cracking induced by reinforcement corrosion. The simulation was performed using finite element based program Abaqus CAE using concrete smeared cracking approach. The numerical modeling used non-uniform and uniform corrosion assumption to get more accurate result. Based on the result, the numerical modeling has 3.01% lower stress than the experimental test. The result of the simulation using non-uniform assumption showed more similar cracking pattern with the experimental test compared with uniform assumption.
Numbers of researchers has been conducted the finite element analysis to predict cracks due to corrosion and assumed the corrosion as uniform expansive pressure. However, the analysis cannot reflect actual stress and crack occur in concrete. The corrosion volume could be bigger in several point at interface between concrete and steel bar. This condition causes the concentrate stress and gives different response with the uniform expansive pressure assumption. This study developed series of finite element model to study the crack propagation of the concrete due to non-uniform corrosion. The analysis is conducted with Abaqus finite element program used smeared cracking approach. Reinforced concrete was modeled in 2D using the Zhao experiment at edge section. This paper also discusses the effect of usage a deformed reinforcement to the spread of rust and crack pattern. Based on this study, the result of finite element modeling shows fairly good agreement with experimental data. It also shows that the usage of deformed reinforcement affect the non-uniformities level of the rust and cause the crack pattern at the concrete propagate differently compared with concrete which use plain reinforcement.
Corrosion in reinforced concrete structure is a serious problem, especially for coastal infrastructure. Managing the coastal infrastructure from corrosion is a really essential action, to make sure that the infrastructure can be used properly throughout its service live. This research focused on analyzing the rust thickness on steel reinforcement due to corrosion. Series of corrosion test using galvanostatic was performed in this research. Furthermore, a predictive model based on Farraday's Law with uniform corrosion assumption also developed in this research and compared with the experimental data. Based on the simulation result, it was found that the predictive model of rust thickness based on Farraday's Law is capable to simulate the corrosion process and thickness of the rust.
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