Abstract
To study the effect of a strong underwater shock wave on a concrete dam, in this research the hammers impact were applied to simulate the underwater shock in a model test. The model scale was 200 according to the gravity-elasticity similitude law. Five acceleration sensors were imbedded along the downstream surface of the dam. The maximum input pressure was evaluated based on the recorded accelerations. The explosive charge and the distance between the explosion center and the dam were determined corresponding to the maximum impact pressure. After the hammers impacted, the upstream face of the dam was fractured and downstream was scabbed; some cracks extended from the upstream face to the downstream face; the head of dam was projected; and the dam appeared entirely displacement. Although the damage similarity of the model and prototype is not verified, this method may be used to verify the quality of a protection project and offered evidence to define a protection project.
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