Palabras clave
breaking bore
impulsive pressure
coastal structures
Cómo citar
Resumen
Tsunami forces on critical coastal structures were reanalyzed by combining laboratory experiments and numerical tsunami simulation, focusing on the formation of breaking bores and their large force to structures. Laboratory experiments demonstrated that nearshore tsunami is likely to form a breaking bore when the slope of the incident tsunami front is steep and the nearshore bed slope is mild. The impulsive pressure to coastal structures was found to increase with the steepness of the tsunami front. Based on these results, together with numerical simulation of tsunami, the formation of bores was discussed in relation to coastal cliff topography in Fukushima Prefecture.Referencias
Asakura R., Iwase K., Ikeya T., Takao M., Kaneto T., Fujii N., and Omori M.: An experimental study on wave force acting on on-shore structures due to overflowing tsunamis. Proc. of Coastal Engineering, JSCE, 47, 911-915, 2000 (in Japanese).
Arikawa, T., M. Ikebe, F. Yamada, K. Shimosako and F. Imamura: Large model test of tsunami force on a revetment and on a land structure, Annual Journal of Coastal Engineering, JSCE, Vol.52, pp.746-750, 2005 (in Japanese).
Goda, Y.: A synthesis of breaker indices, Trans. Japan Society of Civil Engineers, Vol. 2, Part 2, pp. 227-230, 1975.
Jaffe, B., K. Goto, D. Sugawara, G. Gulfenbaum and S. L. Selle: Uncertainties in tsunami sediment transport modeling, Journal of Disaster Research, Vol. 11, No. 4, doi: 10.20965/jdr.2016.p0647, pp. 647-661, 2016.
Kihara, N., Niida, Y., Takabatake, D., Kaida, H., Shiba-yama, A. and Miyagawa, Y.: Large-scale experiments on tsunami-induced pressure on a vertical tide wall, Coastal Engineering, Vol. 99, pp. 46-63, doi: 10.1016/j.coastaleng. 2015.02.009, 2015.
Lynett, P. J. : Precise prediction of coastal and overland flow dynamics: A grand challenge or a fool's errand, Journal of Disaster Research, Vol. 11, No. 4, doi: 10.20965/jdr.2016.p0615, pp. 615-623, 2016.
Sanuki, H., Y. Tajima, H. Yeh and S. Sato.: Dynamics of tsunami flooding to river basin, Proc.Coastal Dynamics 2013, Bordeaux, 2013.
Satake, K., Y. Fujii, T. Harada, and Y. Namegaya: Time and space distribution of coseismic slip of the 2011 Tohoku Earthquake as inferred from tsunami waveform data, Bulletin of the Seismological Society of America, Vol. 103, No. 2b, doi: 10.1785/0120120122, 2012.
Sato, S., H. Yeh, M. Isobe, K. Mizuhashi, H. Aizawa, H. Ashino: Coastal and nearshore behaviors of the 2011 Tohoku Tsunami along the central Fukushima Coast, Proc. Coastal Dynamics 2013, Bordeaux, 2013.
Sato, S. and S. Ohkuma: Destruction mechanism of coastal structures due to the 2011 Tohoku Tsunami in the south of Fukushima, Coastal Engineering Proceedings, Vol. 1, No. 34, doi: 10.9753/ice.v34.structures.75, 2014.
Sato, S.: Characteristics of the 2011 Tohoku Tsunami and introduction of two level tsunamis for tsunami disaster mitigation, Proc. Japan Academy, Ser. B, Vol. 91, 262-272, 2015.
Tadepalli, S. and Synolakis, C. E.: The run-up of N-waves on sloping beaches, Proc. Royal Soc. London A, Vol. 445, pp. 99-112; doi: 10.1098/rspa.1994.0050, 1994.
Yeh, H. and S. Sato: Tsunami effects on buildings and coastal structures, Journal of Disaster Research, Vol. 11, No. 4, doi: 10.20965/jdr.2016.p0662, pp. 662-669, 2016.