Oblique Wave Attack on Rubble Mound Breakwater Crest Walls of Finite Length

Mares Nasarre, P.; van Gent, Marcel R.A.

Oblique Wave Attack on Rubble Mound Breakwater Crest Walls of Finite Length

Journal article (2020)

Authors

P. Mares Nasarre Universitat Politécnica de Valencia

Marcel R.A. van Gent Deltares

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External organisation

Oblique waves Rubble mound breakwaters Crest wall Forces Wave loading Crown wall

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Published Date

2020

Language

English

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Abstract

Rubble mound breakwaters usually present a crest wall to increase the crest freeboards without a large increase of the consumption of material. Methods in the literature to design crest walls are based on estimates of the wave loads. These methods are focused on the maximum loading that attacks a single position of the crest wall. In practice, crest walls have a finite length. Since the maximum loading does not occur at the same instant over the entire length of the crest wall for oblique waves, these methods overestimate the loading in the situation of oblique waves. Wave loads under oblique wave attack have been measured in physical model tests. A method to account for the effect of the finite length of crest walls has been developed, and design guidelines have been derived. The results of this study in combination with the existing methods in the literature to estimate the wave forces enable a more advanced design of crest walls.