FraMCoS 3 1998 Gifu, Japan

LEFM Prediction and Repair Strategy for Crack Extension due to Corrosion of Reinforcement

In order to repair cracks of concrete, the causes of cracking have been intensively studied and can be identified mostly in inspected structures. One of critical cracks is known to result from corrosion of steel reinforcement in concrete. Due to…

First page of: LEFM Prediction and Repair Strategy for Crack Extension due to Corrosion of Reinforcement
Year 1998
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Abstract

In order to repair cracks of concrete, the causes of cracking have been intensively studied and can be identified mostly in inspected structures. One of critical cracks is known to result from corrosion of steel reinforcement in concrete. Due to expansion of corrosive products, tensile cracks of various patterns are nucleated around rebars. Initiation and extension of these cracks are studied experimentally by electrolytic corrosion tests. To clarify crack-nucleating mechanisms, numerical analysis by the boundary element method (BEM) is conducted, on the basis of the linear elastic fracture mechanics (LEFM). The analyses of stress distribution and crack traces are performed. From these results, strategy by means of fiber-reinforced concrete is discussed for repairing cracks due to corrosion of rebars.