Research Articles | Challenge Journal of Concrete Research Letters

Mechanisms of Corrosion-Induced Cracks in Concrete

M. Ohtsu, F. A. K. M. Uddin

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Abstract


Corrosion-induced cracks was simulated in expansion tests.   Kinematical mechanisms of micro-cracks were identified by theSiGMA analysis of acoustic emission (AE).   By applying the boundary element method (BEM), extension of the corrosion-induced crack in an arbitrary direction was analyzed.   It is demonstrated that extension of the corrosion-induced crack is governed by the mode-I failure, although all kinds of micro-cracks are observed  in results of AE analysis.

Keywords


corrosion-induced crack; acoustic emission; boundary element method; stress intensity factor; fracture mechanics

References


Lilliu, G. and van Mier, J. G. M. 3D Lattice-Type Fracture Model for Concrete, Engineering Fracture Mechanics, 2003, 70(7/8):pp. 927-941.

Ohtsu, M., Okamoto, T. and Yuyama, S. Moment Tensor Analysis of AE for Cracking Mechanisms in Concrete, ACI Structural Journal, 1998, 95(2): pp. 87-95.

Ohtsu, M. and Yoshimura, S. Analysis of Crack Propagation and Crack Initiation due to Corrosion of Reinforcement, Construction and Building Materials, 1997, 11(7-8): pp. 437-442.

Ohtsu, M. and Uddin, F. A. K. M. Mechanisms of Corrosion-Induced Cracks in Concrete at Meso- and Macro-Scales, 2008, 6(3):419-429.

Erdogan, F. and Sih, G. C. On the Crack Extension in Plates under Plane Loading and Transverse Shear, J. Basic Engineering, 1963, 12: pp. 519-527.


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