DOI:

Keywords:

Finite Element Modelling, Finite Element Method, Finite Element Analysis, Beam, Softening, Crack, Corrosion Induce Cracking, Stress – Strain Cracking, XFEM

Abstract

The quality and condition of reinforced concrete structures are critical, especially in high-rise buildings where the risk of service life failure is high. Structural collapse often results from cracks and spreading caused by corrosion. To address this, software programs are needed to promptly measure and evaluate the strength, growth, and longevity of structures. Finite Element Modelling (FEM) is a reliable approach to predict deterioration and fracturing. FEM can determine the remaining strength of damaged components, providing crucial data for engineers. It can also replicate corrosion-induced cracking in reinforced concrete elements. This study proposes integrating a corrosion-induced cracking model into a three-dimensional plane-stress finite element model. The model indicates the extent of corrosion-induced damage, allowing for the study of strength and behavioral changes. The effect of corrosion-induced cracking in a thick wall cylinder model is simulated to analyze cracks in the concrete cover. Experiments with different cover thicknesses and reinforcement are conducted using Midas FEA software. There is a slight discrepancy between numerical and analytical models, mainly due to differences in assumptions and parameters. Despite this, the numerical model can simulate both crack propagation and the critical pressure needed for corrosion-induced concrete cover cracking.

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