MODELS FOR PROFILE CHANGE OF RUBBLE MOUND REVETMENT AND PERFORMANCE EVALUATION

Takao Ota, Yoshiharu Matsumi, Takayuki Hirayama, Akira Kimura

Abstract


This study deals with modeling for profile change due to damage progression of rubble mound revetment. The model profiles based on the experimental results consist of three datum points and two sine curves corresponding to the degree of deformation of the revetment. The model profiles agree well with the measured profiles. The model profiles are also used in other experiments and a time-averaged numerical model to examine the change of performance due to damage progression. The reflection coefficient and overtopping rate are taken as performance indices. The measured reflection coefficient decreases slightly, but the overtopping rate increases with damage progression of the revetment. The computed reflection coefficient is almost constant and the overtopping rate shows opposite tendency to the experimental result.

Keywords


rubble mound revetment; profile change; damage progression; performance evaluation

References


Battjes, J.A., and M.J.F. Stive. 1985. Calibration and verification of a dissipation model for random breaking waves, Journal of Geophysical Research, 90(C5), 9159-9167.http://dx.doi.org/10.1029/JC090iC05p09159

Kajima, R., T. Sakakiyama, M. Matsuyama, T. Sekimoto and O. Kyoya. 1993. Stability of armor layer of man-made island sea-wall and overtopping due to extremely large irregular waves, Proceedings of 40th Japanese Conference on Coastal Engineering, JSCE, 686-690. (in Japanese)

Kobayashi, N. and F.J. de los Santos. 2007. Irregular wave seepage and overtopping of permeable slopes, Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 133, No. 4, ASCE, 245-254.

Kobayashi, N., L.E. Meigs, T. Ota and J.A. Melby. 2007. Irregular breaking wave transmission over submerged porous breakwater, Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 133, No. 2, ASCE, 104-116.

Ota, T., Y. Matsumi, N. Kobayashi and A. Kimura. 2007. Influence of damage progression on performance of rubble mound breakwater, Coastal Structures 2007, Proceedings of the 5th International Conference, World Scientific, 1806-1817.

Ota, T., Y. Matsumi, T. Hirayama and A. Kimura. 2009. Models for profile change of rubble mound breakwater and revetment and performance evaluation, Annual Journal of Civil Engineering in the Ocean, JSCE, Vol. 25, 175-179. (in Japanese)


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