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Title |
Crack Growth and Debonding Behaviors of the Pre-cracked RC Beams Repaired with Carbon Fiber Sheets
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Keywords |
사전균열 ; 파괴기구 ; 단차박리 ; 재하속도 Pre-Crack ; Mechanism of the failure ; Stepped delamination ; Loading speed |
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Abstract |
This study look into the mechanisms of growth and magnification of the cracks and delamination in the pre-cracked RC beams repaired with carbon fiber sheets. The experimental parameters were loading type, loading speed and crack. In the experiments, it was confirmed that a failure of beams began with development and propagation of the stepped delamination in the below the loading point due to the rapid change of shear force, but mechanisms of the failure were not influenced with loading type, loading speed and pre-cracks. Particularly, in the case of beams having the pre-cracks, growth of crack concentrated at the special crack below the loading point and led to failure of the beam by delamination due to magnification of crack.
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