Experimental investigation on non-breaking wave forces and overtopping at the recurved parapets of vertical breakwaters

Martinelli, Luca; Ruol, Piero; Volpato, Matteo; Favaretto, Chiara; Castellino, Myrta; Girolamo, Paolo De; Franco, Leopoldo; Romano, Alessandro; Sammarco, Paolo

doi:10.1016/j.coastaleng.2018.08.017

Cited by 54 publications

(34 citation statements)

References 16 publications

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“…As a result, it was found that the increase of the force in the case of a recurved parapet is of about 2.8 times the force obtained for the same wave on a traditional plane parapet wall. The same numerical findings pointed out by Castellino et al (2018) have been confirmed by the experimental study carried out by Martinelli et al (2018).…”

Section: Introduction and State Of The Artsupporting

confidence: 85%

Wave Loading for Recurved Parapet Walls in Non-Breaking Wave Conditions: Analysis of the Induced Impulsive Forces

Castellino¹,

Lara²,

Romano³

et al. 2018

Int. Conf. Coastal. Eng.

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This paper describes 2-D numerical simulations aiming to reproduce the pressure impulse named confined-crest impact (Castellino et al., 2018), which occurs when a recurved parapet wall and non-breaking wave conditions are interacting. The simulations are carried out by using the IH2VOF and IHFOAM, the latter developed as OpenFOAM additional library. The results show a large increase of the pressures and forces value when the recurved part of the vertical parapet results completely occluded by the non-breaking wave crest. A sensitivity analysis has been carried out to study the influence of the geometrical parameters (radius r and opening angle a). It has been found a low variability with respect to the radius increase (from 1.0 m to 2.0 m) and a higher influence related to the opening angle variation. Finally, the non-dimensional force component has been represented as a function of the hydraulic and geometrical parameters by means of the dimensionless product (l/h)*s. These parameters represent the overhang extension seaward of the parapet, the water depth and the wave steepness with reference to deep-water conditions.

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Section: Introduction and State Of The Artsupporting

confidence: 85%

Wave Loading for Recurved Parapet Walls in Non-Breaking Wave Conditions: Analysis of the Induced Impulsive Forces

Castellino¹,

Lara²,

Romano³

et al. 2018

Int. Conf. Coastal. Eng.

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“…These structures are subjected to a variety of hydraulic processes, one of the most important and extensively studied being wave overtopping, due to the danger it poses to the people, property and infrastructure being protected. Therefore, the prediction of wave overtopping is crucial and it can be achieved using three established methods [1]: by using empirical formulae derived from large datasets of laboratory and field measurements (e.g., [2][3][4][5]); by using scaled physical model tests carried out in laboratories (e.g., [6][7][8][9][10][11][12][13]) some of which were included in the CLASH dataset [14] to calibrate formulae and neural network tools; or by simulating the hydraulic response of a structure using numerical models (e.g., [15][16][17][18][19][20][21][22]). Over the years, extensive research has been carried out into all of these methodologies; nonetheless, they are not perfect design tools, and they require further improvement.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Wave Overtopping: A New Small Scale Laboratory Dataset for the Assessment of Uncertainty for Smooth Sloped and Vertical Coastal Structures

Williams

Briganti

Romano

et al. 2019

JMSE

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Most physical model tests carried out to quantify wave overtopping are conducted using a wave energy spectrum, which is then used to generate a free surface wave time series at the wave paddle. This method means that an infinite number of time series can be generated, but, due to the expense of running physical models, often only a single time series is considered. The aim of this work is to investigate the variation in the main overtopping measures when multiple wave times series generated from the same spectrum are used. Physical model tests in a flume measuring 15 m (length) by 0.23 m (width) with an operating depth up to 0.22 m were carried out using a stochastic approach on two types of structures (a smooth slope and a vertical wall), and a variety of wave conditions. Results show variation of overtopping discharge, computed by normalising the range of the discharges at a certain wave condition with the maximum value of the discharge in the range up to 10%, when the same wave time series is used, but this range increases to 75% when different time series are used. This variation is found to be of a similar magnitude to both the one found with similar experiments looking at the phenomena in numerical models, and that specified by the confidence bounds in empirical methods.

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“…Castellino et al [14] and Martinelli et al [15] conducted numerical and experimental investigations, respectively, of non-breaking wave forces and overtopping discharges on vertical breakwaters with parapets. Their data showed good agreement with the reduction factor proposed by Pearson et al [12].…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of Parapets on Wave Overtopping on Mound Breakwaters with Crown Walls

et al. 2019

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Background literature on the influence of parapets on the overtopping of mound breakwaters is limited. In this study, numerical tests were conducted using computational fluid dynamics (CFD) to analyze the influence of nine crown wall geometries (seven with parapets). The CFD model was implemented in OpenFOAM ® and successfully validated with laboratory tests. A new estimator of the dimensionless mean wave-overtopping discharges (logQ) on structures with parapets is proposed. The new estimator depends on the estimation of logQ of the same structure without a parapet. The effects on wave overtopping of the parapet angle (ε p ), parapet width (w p ), and parapet height (h p ) were analyzed. Low values of ε p and w p /h p ≈ 1 produced the highest parapet effectiveness to reduce the mean wave-overtopping discharges.

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Experimental investigation on non-breaking wave forces and overtopping at the recurved parapets of vertical breakwaters

Cited by 54 publications

References 16 publications

Wave Loading for Recurved Parapet Walls in Non-Breaking Wave Conditions: Analysis of the Induced Impulsive Forces

Wave Loading for Recurved Parapet Walls in Non-Breaking Wave Conditions: Analysis of the Induced Impulsive Forces

Experimental Analysis of Wave Overtopping: A New Small Scale Laboratory Dataset for the Assessment of Uncertainty for Smooth Sloped and Vertical Coastal Structures

Influence of Parapets on Wave Overtopping on Mound Breakwaters with Crown Walls

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