STABILITY OF ARMOR UNITS COVERING RUBBLE MOUND OF COMPOSITE BREAKWATERS AGAINST A STEADY OVERFLOW OF TSUNAMI

Jun Mitsui; Akira Matsumoto; Minoru Hanzawa; Kazuo Nadaoka

doi:10.9753/icce.v34.structures.34

No. 34 (2014), Coastal Structures

No. 34 (2014)

STABILITY OF ARMOR UNITS COVERING RUBBLE MOUND OF COMPOSITE BREAKWATERS AGAINST A STEADY OVERFLOW OF TSUNAMI

Coastal Structures

https://doi.org/10.9753/icce.v34.structures.34

Published 2014-10-28

Jun Mitsui⁺⁻
Akira Matsumoto⁺⁻
Minoru Hanzawa⁺⁻
Kazuo Nadaoka⁺⁻

Jun Mitsui

Fudo Tetra Corporation

Akira Matsumoto

Fudo Tetra Corporation

Minoru Hanzawa

Fudo Tetra Corporation

Kazuo Nadaoka

Tokyo Institute of Technology

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Keywords

tsunami
overflow
armor unit
stability
harbor-side
breakwater

How to Cite

Mitsui, J., Matsumoto, A., Hanzawa, M., & Nadaoka, K. (2014). STABILITY OF ARMOR UNITS COVERING RUBBLE MOUND OF COMPOSITE BREAKWATERS AGAINST A STEADY OVERFLOW OF TSUNAMI. Coastal Engineering Proceedings, 1(34), structures.34. https://doi.org/10.9753/icce.v34.structures.34

Abstract

This paper presents a simple and highly accurate stability estimation method for armor units covering breakwater rubble mounds against tsunami overflow. In this method, overflow depth is used to represent the external force. This enables an easier and more robust estimation of the required mass of the armor units than the conventional method based on flow velocity. This method takes into account the influence of the impingement position of the overflow jet and the influence of harbor-side water depth, both of which are important factors for armor stability. Numerical computation is also carried out aiming at the establishment of a stability analysis method for armor units. The validity of the computation method is confirmed by comparing the measured current field. The stability of armor units is investigated by computing the hydraulic force acting on each armor unit.

https://doi.org/10.9753/icce.v34.structures.34

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References

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STABILITY OF ARMOR UNITS COVERING RUBBLE MOUND OF COMPOSITE BREAKWATERS AGAINST A STEADY OVERFLOW OF TSUNAMI

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