Dynamic response of caisson type quay wall

The stability of caisson type quay wall considering the displacements were investigated for two different cases: in the first case, cyclic loading with different frequency was applied to the caisson type quay wall and the horizontal displacement (damage) on the structure was measured then by repairing the damage due to cyclic loadings after each experiment, experiments were performed with different cyclic loadings in similar way , ii: in the second case, same cyclic loadings used in first case were applied on structure successively and without repairing the damages on structure and the displacement (damage) on the structure was measured. After completion of the experiments for two different cases, the measured displacements were compared. Based on the experiment results, it was seen that for same cyclic motion, displacements of the second case were less than those in the first case. In addition, using experimental results for the first case, the instantaneous dynamic friction coefficient between concrete and the gravel base was calculated. It was found that ratio between calculated instantaneous dynamic friction coefficient and static friction coefficient oscillates around 1. Displacements, calculated by using double integration of the relative acceleration, were in compatible with the measured displacements during the experiments.