Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015
Effects of the High-Order Non-Linearity of Random Waves on Wave Pressures Acting on Breakwaters
Publication: Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
ABSTRACT
In the design of breakwaters, the wave pressures out of the surf zone are estimated by the maximum wave height which corresponds to the 1.8 times of significant wave height according to Rayleigh theory. On the other hand, the nonlinear four-wave interactions can lead to a significant enhancement of occurrence frequency of extreme waves whose height can exceed above maximum wave height. It is necessary to appropriately evaluate the effects of the deviation from Rayleigh theory on the wave pressures acting on breakwaters under extreme wave conditions. In this study, the analyses of data obtained from the physical experiments in a wave tank were conducted through the comparison with the numerical simulations based on the Boussinesq equations. As a result, it is possible to evaluate the uncertainty of the wave pressures including the deviation from the Rayleigh theory by using the occurrence frequency of the maximum wave height depending on the kurtosis changing.
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ACKNOWLEDGMENTS
We research was partially supported by the Ministry of Education, Science, Sports and Culture, Japan, through Grant-in-Aid (PI: Nobuhito Mori).
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Published In
Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
Pages: 630 - 637
Editors: Louise Wallendorf, U.S. Naval Academy and Daniel T. Cox, Ph.D., Oregon State University
ISBN (Online): 978-0-7844-8030-4
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© 2017 American Society of Civil Engineers.
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Published online: Jul 11, 2017
Published in print: Jul 11, 2017
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