3-D Scale Model Study of Wave Run-Up, Overtopping and Damage in a Rubble-Mound Breakwater Subject to Oblique Extreme Wave Conditions

• Published in: Diffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum Vol. 396; pp. 32 - 41
• Main Authors: Peña, Enrique, Sande, José, Figuero, Andrés, Bornschein, Antje, Reis, Maria Teresa, Hofland, Bas, Carvalho, Rita F., Coimbra, Mário, Körner, Moritz, Pohl, Reinhard, Lemos, Rute, Pedro, Francisco, Dost, Bastian, Fortes, Conceição Juana, Alvarellos, Alberto, Kerpen, Nils B., Santos, João Alfredo, Weimper, Julius, van den Bos, Jeroen
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 16.08.2019
• Subjects: Armor; Cubes; Damage assessment; Empirical analysis; Incident waves; Model testing; Numerical models; Rubblemound breakwaters; Scale models; Slopes; Stability analysis; Three dimensional models; Instrumentation; Physical Model; 3D-Wave Basin
• ISSN: 1012-0386; 1662-9507; 1662-9507
• DOI: 10.4028/www.scientific.net/DDF.396.32

A set of scale-model tests carried out to enlarge the range of wave steepness values analysed in run-up, overtopping and armour layer stability studies, focusing on oblique extreme wave conditions and on their effects on a gentler slope breakwater’s trunk armour and roundhead, is presented in this paper. A stretch of a rubble mound breakwater (head and part of the adjoining trunk, with a slope of 1(V):2(H)) was built in a wave basin at the Leibniz University Hannover to assess, under extreme wave conditions (wave steepness of 0.055) with different incident wave angles (from 40º to 90º), the structure behaviour in what concerns wave run-up, wave overtopping and damage progression of the armour layer. Two types of armour elements (rock and Antifer cubes) were tested. Non-intrusive methodologies including a new application of laser scanning technique for the assessment of both armour layer damage and wave run-up and overtopping were used. It is expected that such work will contribute also with data to improve empirical formulas as well as to validate complex numerical model for wave-structure interaction.