Cracking Mechanisms Due to Corrosion in Concrete Identified Byae and Bem

Abstract

Due to expansion of corrosive product, various patterns of cracks are nucleated around reinforcement in concrete. Crack kinematics are identified by acoustic emission (AE)-SIGMA (Simplified green's function for Moment tensor Analysis) procedure. Numerical analysis is conducted by the boundary element method (BEM) based on the concept of the linear elastic fracture mechanics (LEFM). Crack traces due to corrosion are simulated by the two-domain BEM. The behaviors of the dimensionless stress intensity factors (K1/K1 and K11/KID), and the cracking modes are studied for the different types of crack patterns. It is found that cracking mechanisms due to corrosion of reinforcement are mostly associated with the mode-I failure.