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Effect of a submerged bay-mouth breakwater on tsunami behavior analyzed by 2D/3D hybrid model simulation

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  • Koji Fujima

Abstract

The hybrid numerical model had been developed to simulate a complicated 3D flow around structures generated by tsunami. In the model, the conventional 2D model is adopted for the wide region far from structures and the 3D non-hydrostatic pressure model is used in the limited region adjacent to structures. The applicability of the model is shown by comparisons of the numerical results with the experimental results of the laboratory model tests and the numerical analysis results of the conventional whole 2D simulation. In addition, the effect of a submerged structure at the opening of a breakwater is discussed from the numerical simulations by the hybrid model. The submerged structure improves the stability of the rubble mound and reduces the tsunami inflow into the bay, while it increases the water surface velocity around the opening of the breakwater. The increase of surface velocity causes the increases of impulsive forces by collision with drafts and so on. Copyright Springer Science+Business Media B.V. 2006

Suggested Citation

  • Koji Fujima, 2006. "Effect of a submerged bay-mouth breakwater on tsunami behavior analyzed by 2D/3D hybrid model simulation," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 39(2), pages 179-193, October.
    • Handle: RePEc:spr:nathaz:v:39:y:2006:i:2:p:179-193
    DOI: 10.1007/s11069-006-0022-x
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    Cited by:

    1. Xiaohua Bao & Bin Ye & Guanlin Ye & Feng Zhang, 2016. "Co-seismic and post-seismic behavior of a wall type breakwater on a natural ground composed of liquefiable layer," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 83(3), pages 1799-1819, September.
    2. Yu Huang & Chongqiang Zhu, 2015. "Numerical analysis of tsunami–structure interaction using a modified MPS method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 75(3), pages 2847-2862, February.

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