Study of Reflection of New Low-Reflectivity Quay Wall Caisson

Garrido, Joaquín M.; León, Daniel Ponce de; Berruguete, Antonio; Martínez, Silvia Elena Malo; Manuel, José; Fort, Lisardo; Yagüe, Diego; González-Escrivá, Jose A.; Medina, Josep R.

doi:10.9753/icce.v32.structures.27

Cited by 4 publications

(3 citation statements)

References 17 publications

(10 reference statements)

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“…Earlier studies have resulted in a design based on the multi-cell circuit concept, which includes different dissipation chambers that will implement the technical effect of Jarlan-type structures. As a novelty, the different dissipating chambers are extended horizontally forming circuits of several cells, along different directions, thus extending the pathway of the circulation of the flow induced by the waves and increasing the antireflectiveness for the lowest frequency waves (Garrido et al, 2010) without enlarging the width of the structure. Additionally, the design based on the multi-cell circuit offers a practical solution from the constructive point of view, as well as being economically viable (Martinez et al, 2010).…”

Section: The Concept Of Multi-cell Circuitmentioning

confidence: 99%

Antireflective Vertical Structure Extended for Attenuation of Low Frequency Waves

González-Escrivá¹,

Medina²

2012

Int. Conf. Coastal. Eng.

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A new maritime vertical structure based in the concept of multi-cell circuit ) is presented to improve the antireflective performance for wave reflection of wind waves and oscillations associated with intense storms, resonance waves in port basins, etc. The large-scale laboratory results show a good performance of the multicell caisson tested, with less than 28% time for a 50% reduction in energy compared to the conventional one. Reflection coefficient is estimated for short waves in the range 65% to 90% increasing as frontal openings increase.

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Section: The Concept Of Multi-cell Circuitmentioning

confidence: 99%

Antireflective Vertical Structure Extended for Attenuation of Low Frequency Waves

González-Escrivá¹,

Medina²

2012

Int. Conf. Coastal. Eng.

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“…Low reflective quays are featured as porous or open structures, and have been studied experimentally over many years (Jarían 1961(Jarían , 1965Ijima et al 1976;Matteotti 1991;Fugazza & Natale 1992;Tanimoto & Takahashi 1994;Suh et al 2006;Garrido et al 2010;Taveira Pinto et al 2011). Each of these studies, however, works well only on its own dataset, thus a general formulation (in terms of reflection coefficient) to relate the reflected wave energy to structural features and wave conditions does not exist.…”

Section: Introductionmentioning

confidence: 98%

Evolutionary data-modelling of an innovative low reflective vertical quay

Altomare

Gironella

Laucelli

2012

Journal of Hydroinformatics

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Vertical walls are commonly used as berthing structures. However, conventional vertical quays may have serious technical and environmental problems, as they reflect almost all the energy of the incident waves, thus affecting operational conditions and structural strength. These drawbacks can be overcome by the use of low reflective structures, but for some instances no theoretical equations exist to determine the relationship between the reflection coefficient and parameters that affect the structural response. Therefore, this study tries to fill this gap by examining the wave reflection of an absorbing gravity wall by means of evolutionary polynomial regression, a hybrid evolutionary modelling paradigm that combines the best features of conventional numerical regression and genetic programming. The method implements a multi-modelling approach in which a multi-objective genetic algorithm is used to get optimal models in terms of parsimony of mathematical expressions and fitting to data. A database of physical laboratory observations is used to predict the reflection as a function of a set of variables that characterize wave conditions and structure features. The proposed modelling paradigm proved to be a useful tool for data analysis and is able to find feasible explicit models featured by an appreciable generalization performance

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“…To date, several low-reflectivity structures, to cope with this specific problem, have been presented in the literature, as reviewed in Oumeraci, 2010 andHuang et al, 2011. The effectiveness of slotted vertical perforated-walls has been studied since many years, with the earliest studies being those by Jarlan, 1961, and the most recent ones by Neelamani et al, 2017. Such kind of structure is often adopted as frontal and internal wall of caisson breakwaters embodying one or multiple chambers (Garrido et al 2010;Gonzalez-Escriva & Medina, 2012;Ciocan et al, 2017;Lopez et al, 2018). Caissons with internal rubble mound were also proposed with the aim to reduce inner harbor agitation (Teocharis et al, 2011, Altomare & Gironella, 2014.…”

Section: Introductionmentioning

confidence: 99%

On the Effectiveness of Oscillating Water Column Devices in Reducing the Agitation in Front of Vertical Walls Harbor Structures

Cappietti¹,

Simonetti²

2018

Int. Conf. Coastal. Eng.

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Wave reflection at harbor structures negatively affects the navigability of entrance canals and harbor tranquility. In case of rubble-mound structures this phenomenon is relatively limited if compared to vertical-wall structures. However, in case of deep waters, the use of the latter is an obliged choice due to economic reasons. Furthermore, vertical wall structures are also the preferred choice of harbor managers since they permit a better design of the berthing structures and help the effective use of space inside the harbor. Reducing the wave reflection at vertical wall structures is thus an important measure. To date, several approaches have been presented in the literature (see for instance Huang et al., 2011, and references therein). The effectiveness of slotted vertical perforated-walls has been studied since many years (most recently: Neelamani et al., 2017). Such kind of structure is often also adopted as frontal and internal wall of caisson breakwaters embodying one or multiple chambers (most recently: Ciocan et al., 2017). Another alternative, so far proposed, are caissons with internal rubble mound (Altomare, C., & Gironella, X., 2014). The so called Oscillating Water Column (OWC) concept, commonly investigated as wave energy converter (Falcão, 2010), can also represent a viable alternative to absorb the incident energy thus decreasing its reflection. However, the studies that investigate its effectiveness as anti-reflection device are quite limited (Liu and Geng, 2012, He and Huang 2016). This work aims to contribute to the present knowledge on the effectiveness of an OWC, embodied in quay walls or harbor breakwaters, as an alternative to reduce the wave reflection at vertical wall structures.

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Study of Reflection of New Low-Reflectivity Quay Wall Caisson

Cited by 4 publications

References 17 publications

Antireflective Vertical Structure Extended for Attenuation of Low Frequency Waves

Antireflective Vertical Structure Extended for Attenuation of Low Frequency Waves

Evolutionary data-modelling of an innovative low reflective vertical quay

On the Effectiveness of Oscillating Water Column Devices in Reducing the Agitation in Front of Vertical Walls Harbor Structures

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