Papers
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Wave overtopping and flood risk assessment in harbours: a case study of the port of Las Nieves, Gran Canaria
This paper presents the analysis of the probability of occurrence of wave overtopping events as well as its consequences at the Port of Las Nieves in Agaete, Gran Canaria Island, with the evaluation of the resulting level of flood risk. The study has been conducted using a third-generation spectral wave model to reproduce wave propagation from deep to shallow water depths considering the associated mean sea level, and a neural network-based model, for estimating mean wave overtopping discharges. Results reveal that overtopping in the initial sections of the port, located in the port access area, is substantially higher than that associated with the cross-sections of the main body of the breakwater, so that control actions to reduce overtopping are required due to the important socioeconomic implications regarding the infrastructure inoperability.
Year: 2017
Number Pages:
1-10pp.
Author(s): Santana-Ceballos, J.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Rodríguez, G.
: WIT Transactions on the Built Environment
Editor: WIT Press
Volume:
Vol. 170.
Keywords: Port of Las Nieves; Neural networks; Flood risk; Wave overtopping
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Avaliação comparativa de ferramentas neuronais. Aplicação à Praia da Vitória, Terceira, Açores
Neste trabalho, descreve-se a aplicação ao porto e baía da Praia da Vitória, na ilha Terceira, Açores, Portugal, da metodologia de avaliação do risco de galgamentos em estruturas marítimas em desenvolvimento no LNEC, considerando duas ferramentas neuronais para cálculo dos galgamentos baseadas em resultados da aplicação de redes neuronais artificiais, nomeadamente a ferramenta NN_Overtopping2 e a Overtopping Predictor v1.1. Em particular, avalia-se comparativamente quais as implicações que a utilização de cada uma destas ferramentas tem em termos de número de eventos de galgamento e magnitude dos caudais médios galgados, bem como consequente grau de risco, para as 9 secções-tipo de estruturas marítimas estudadas no porto e baía da Praia da Vitória. O período de estudo é de 5 anos (2008 a 2012).
Year: 2016
Number Pages:
49-68pp.
Author(s): Reis, R.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Poseiro, P.; Santos, J. A.
: Vetor
Editor: FURG
Volume:
Volume 26, n. 1.
Keywords: Galgamentos; Risco; Praia da Vitória; Porto; Overtopping predictor V1.1; NN_Overtopping2; Ferramentas neuronais
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Galgamento de uma estrutura portuária protegida por um quebra-mar submerso: o caso do Porto de Leixões, Portugal
O galgamento de estruturas portuárias consiste na passagem de água sobre o coroamento da estrutura pela ação da agitação marítima e é um dos fenómenos com maior impacto na integridade da estrutura e na segurança da zona por ela protegida. O principal objetivo deste trabalho é estudar o galgamento num quebra-mar de taludes, com um importante muro cortina, protegido por um quebra-mar submerso. Em particular, pretende-se otimizar a geometria do quebra-mar submerso situado a barlamar do quebra-mar de taludes, no qual se pretende diminuir o galgamento.A estrutura marítima em estudo é o molhe norte do Porto de Leixões, em frente ao qual já existe um quebra-mar submerso na zona da cabeça. Pretende-se estender a zona do molhe protegida pelo quebra-mar submerso e, para tal, é necessário estudar qual a melhor geometria e posição a adotar para este quebra-mar.Para estudar a influência da geometria e da posição do quebra-mar submerso no galgamento do molhe norte, utilizou-se o modelo numérico IH2VOF. Simularam-se três condições de agitação regular, que diferem somente na altura de onda, e sete geometrias do quebra-mar submerso, que diferem da configuração original (a existente atualmente) em três características: a distância entre o quebra-mar submerso e o molhe, a cota de coroamento do quebra-mar submerso e a sua largura de coroamento.Com a realização deste estudo, para as condições de agitação consideradas, verificou-se que as características com maior impacto na redução do galgamento no molhe norte do Porto de Leixões são: o aumento da distância entre o quebra-mar submerso e o molhe e o aumento da cota de coroamento do quebra-mar submerso. O caudal médio de galgamento para as condições de agitação em estudo reduziu-se de um valor máximo de 0,71 l/s/m para a configuração original para 0,02 l/s/m em duas das novas configurações analisadas, ou seja, uma redução de 97% face à configuração original.
Year: 2016
Number Pages:
121-131pp.
Author(s): Bairrão, M.; Neves, M. G.; Reis, M. T.; Taveira-Pinto, F.
: Revista de Gestão Costeira Integrada / Journal of Integrated Coastal Zone Management
Editor: APRH
Volume:
16 (2).
Keywords: Modelação física; IH2VOF; Modelação numérica
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Improving the aerodynamic performance of Vila-Real Bridge deck-section
The susceptibility of bridge decks to vortex induced oscillations can b eaddressed through wind-tunnel testing. This paper considers the case of the Vila-Real Bridge, in the north of Portugal, which has the highest deck above ground (230m), among concrete-deck bridges cable-stayed in the central plane. It has a single-cell rectangular box girder with a wide top flange supported by regularly spaced inclined struts. Aeroelastic studies of this precise type of deck seem nonexistent in the literature.Results of sectional model tests are presented for a selection of three distinct angles of attack and three deck configurations, including a solution, alternative to the usual mitigation measures, that solved the susceptibility to vortex induced vibration of the deck and that has no relevant additional design or building costs.With the proposed approach, bridge designers may be able to relegate the use of sections with high aerodynamic performance
Year: 2016
Number Pages:
72-83pp.
Author(s): Vaz, D.; Almeida , R.A.S.B; Didier, E.; Urgueira, A.P.V.; Borges, A.R.J.
: Journal of Wind Engineering and Industrial Aerodynamics
Editor: Elsevier
Volume:
Volume 156.
Keywords: Box girder; Wind tunnel testing; Sectional model; Oscillations mitigation; Bridge aeroelasticity
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Mechanics of the scouring and sinking of submerged structures in a mobile bed: A physical model study
Wave-induced flow velocity and turbulence may cause scouring in the seabed around coastal structures depending on the wave climate and tidal water depth. A 3-D physical modelling study was conducted to investigate the possible causes of the sinking of two submerged coastal structures on the Santa Maria del Mar (SMM) beach, Spain. The experimental investigation was conducted by employing a Froude similarity law with a geometric scale of 1:20, and the submerged modular structure was subjected to different wave climates and tidal water levels. The combinations of the significant wave height and peak period were chosen from in-situ real wave conditions thatwere monitored during the sinking of the prototype structures. Linking and unlinking conditions for the modules in the structure were investigated in this study. The results show that the modules sank to approximately 48% of their height at the end of the tests with storm waves and semi-linking conditions of low water depth. Most of the experimental results were compatible with the prototype monitoring results. Tests with proper linking among themodules and testswith an appropriate gravel foundation resulted in a sustainable solution because they presented much less or almost no scouring and sinking.
Year: 2016
Number Pages:
50
Author(s): Khan-Mozahedy, A.B.M.; Muñoz-Perez, J.; Neves, M. G.; Sancho, F. E.; Cavique, R.
: Coastal Engineering
Editor: Elsevier
Volume:
110.
Keywords: Gravel bed; Sandy bed; Pumice stone; Submerged modular structure; Sinking; Scour
Info
Numerical simulation of flow interaction between stationary and downstream elastically mounted cylinders in tandem at low Reynolds numbers
Despite the simplicity of the geometry of the circular cylinders, the uniform flow around them is complex,since it may induce unsteady forces on structures associated with vortex shedding. This paper describes the study of two circular cylinders (the downstream one is elastically mounted in transversal direction) in tandem arrangement subject to bi-dimensional uniform laminar flows at low Reynolds numbers. The academic numerical model Ifeinco, which is based on the finite element method and uses a partitioned scheme that considers two-way interaction of fluid flow and structure, has been employed to the analysis.Firstly, both stationary cylinders in tandem arrangement for Re = 100 are analysed for center to center distance between the cylinders, L/D, from 1.5 to 6.0. Results of lift and drag coefficients and Strouhal number are compared with other numerical results and good agreement is found. Secondly, numerical results for L/D = 5.25, considering downstream elastically mounted cylinder, are analysed for Reynolds numbers ranging from 100 to 140. It shows that the resonance occurs for Reynolds numbers between 115 and 120 and the maximum dimensionless amplitude of oscillation is 0.721 for Re = 118.
Year: 2016
Number Pages:
11p.
Author(s): Teixeira, P.; Didier, E.
: Journal of the Brazilian Society of Mechanical Sciences and Engineering
Editor: Springer
Keywords: Wake interference; Tandem arrangement; Circular cylinders; Flow-induced vibration; Finite element method
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Numerical simulation of wave interacting with a submerged cylinder using a 2D RANS model
A 2D RANS numerical model (IH2VOF) is employed to study wave interacting with a circular cylinder with a diameter of 0.02 m in a water depth of 0.27 m, with a wave period of 1.08 s and a wave height of 0.047 m. The influence of the wall proximity on the forces is analyzed for ratiosbetween the pipe (i.e. circular cylinder) distance from the bottom and the pipe diameter varying from 0.04 to 1.5. Results of lift forces and streamlines are compared with the experimental results of Jarno-Druaux et al. (1995) and good agreement is found. Lift, drag and inertia coefficients are also compared with experimental results and the same trend of fundamental quantities with the gap between the cylinder and the bottom was obtained with the model giving slightly larger values. Finally, the influence of the method to estimate the drag and inertia coefficients in the force calculated using Morison equation is analyzed and Morison method shows the better agreement.
Year: 2016
Number Pages:
1
Author(s): Inverno, J.; Neves, M. G.; Didier, E.; Lara, J. L.
: Journal of Hydro-environment Research
Editor: Elsevier
Volume:
12.
Keywords: Hydrodynamic forces; Submerge circular cylinder; Drag and inertia coefficients; RANS modeling
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Performance of a fuzzy ARTMAP artificial neural network in characterizing the wave regime at the Port of Sines (Portugal)
Techniques based on artificial neural networks (ANNs) have been increasingly applied to predict emergency situations, such as extreme wave conditions, wave overtopping or flooding, and damage to maritime structures, in coastal and port areas. In this work, a fuzzy adaptive resonance theory with mapping (FAM) ANN was trained to predict the wave regime both inside and at the entrance to the Port of Sines, one of the major trade and economic gateways of the Iberian Peninsula, located on the Portuguese west coast. In situ measurements using pressure sensors, wave buoy data, and results from two numerical wave propagation models
Year: 2016
Number Pages:
1362
Author(s): Santos, F.; Reis, M. T. L. G. V.; Fortes, C. J. E. M.; Lotufo, A.; Neves, D. R.; Poseiro, P.; Maciel, G.
: Journal of Coastal Research
Editor: Coastal Education and Research Foundation
Volume:
Volume 32, Issue 6.
Keywords: Artificial neural network (ANN) training and validation; In situ measurements; Wave buoy data; Numerical wave propagation modeling
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Photogrammetric analysis of rubble mound breakwaters scale model tests
The main goal of this paper is to develop a photogrammetric method in order to obtain arobust tool for damage assessment and quantification of rubble-mound armour layers during physicalscale model tests. With the present work, an innovative approach based on a reduced number ofdigital photos is proposed to support the identification of affected areas. This work considers twosimple digital photographs recording the instants before and after the completion of the physicaltest. Mathematical techniques were considered in the development of the procedures, enabling thetracking of image differences between photos. The procedures were developed using an open-sourceapplication, Scilab, nevertheless they are not platform dependent. The procedures developed enablethe location and identity of eroded areas in the breakwater armour layer, as well as the possibilityof quantifying them. This ability is confirmed through the calculation of correlation coefficients ineach step of the search for the more damaged area. It is also possible to make an assessment of themovement of armour layer units.
Year: 2016
Number Pages:
541
Author(s): Lemos, R.; Loja, M.A.R.; Rodrigues, J.; Rodrigues, J.A.S.
: AIMS Environmental Science
Editor: AIMS Press
Volume:
3(3).
Keywords: Scale model tests; Pphotogrammetric analysis; Rubble-mound breakwaters
Info
Smoothed particle hydrodynamics numerical model for modelling an oscillating water chamber
This paper presents theapplicatio nand thevalidation of the SPH numerical model SPHyCE, based on astandard Smoothed Particle Hydrodynamics formulation, for modeling anonshore oscillating waterchamber, comparing results of amplification factor and phase lag with those obtained by a mesh-basedRANS model .Firstly, ananalysis of the results for differentre solutions (i.e.particle dimension) showedthe independence of results with refinement. Secondly, the amplification factor of mean free surfaceelevation inside th eoscillating water chamber and the phase lag between time series of free surfaceelevation outside and inside the water chamber were analysed. A good agreement was achieved between the mesh free SPHyCE model and the mesh-based RANS model. SPHyCE model was finally applied to analyse the hydrodynamic fluid flow inside and outside the water chamber and to quantify the forces onthe vertical wall and the amplification factor for different incident wave heights for a rough sea state with complex wave breaking, impact loads and overtopping, contributing to the future applications ofSPH models for development and studies of OWC devices.
Year: 2016
Number Pages:
397
Author(s): Didier, E.; Neves, D. R.; Teixeira, P.; Dias, J.; Neves, M. G.
: Ocean Engineering
Editor: Elsevier
Volume:
123.
Keywords: Coastal engineering; Hydrodynamic forces; Wave
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Comunicação
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Análise das forças num emissário submarino utilizando um modelo numérico 3D RANS-VoF
O conhecimento das forças devido à acção das ondas que atuam nos emissários submarinos, compostos por uma conduta e anéis de estabilização de betão, para agitação com direcção de propagação próxima da direcção do emissário, é essencial para o seu dimensionamento. Esta é uma configuração complexa, para a qual a modelação numérica, utilizando modelos 3D de tipo RANSVoF (Reynolds-Average-Navier-Stokes Volume-of-Fluid), é especialmente adequada para obter uma estimativa das forças na conduta e nos anéis. O presente estudo consiste na simulação de um emissário submarino com anéis de estabilização à escala 1:15 que foi ensaiado num tanque de ondas tridimensional, nas instalações do Danish Hydraulics Institute, para estudar a influência da direcção da agitação incidente e da distância da conduta ao fundo nas forças que atuam no emissário. Os resultados numéricos são comparados aos experimentais: obtém-se uma boa concordância nas forças de arrasto, mas as forças de sustentação são subestimadas numericamente.
Year: 2018
Number Pages:
447-450pp.
Author(s): Didier, E.; Neves, M. G.; Teixeira, P. R. F.
Editor: Instituto Hidrográfico
Keywords: Tanque de ondas numérico; RANS-VoF; Forças; Emissários submarinos
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Análise multicritério para apoio à decisão em intervenções de obras marítimo-portuárias: estudo de quebra-mares de talude
Os quebra-mares de talude estão entre as obras de proteção marítimo-portuárias mais frequentes em Portugal. Devido ao ambiente marítimo agressivo a que estão sujeitos, requerem obras de manutenção periódicas que garantam o seu funcionamento adequado.O elevado valor associado às reparações e/ou reabilitações e às grandes dimensões dos quebra-mares, muitas vezes inviabilizam que intervenções em estruturas desta natureza sejam realizadas de forma completa.Realizou-se um estudo de análise multicritério, com objetivo de propor critérios a serem utilizados na metodologia Measuring Attractiveness by a Category Based Evaluation Technique (MACBETH), acrescida de informações técnicas da base de dados da aplicação de Análise de Observação Sistemática de Obras Marítimas (ANOSOM), com a intenção de otimizar o impacto dos investimentos e auxiliar a tomada de decisões quanto a priorização de intervenções diretamente relacionadas com a maximização da vida útil dos quebra-mares e o seu correto funcionamento. Os casos de estudo são os quebra-mares de Vilamoura, Quarteira e Faro-Olhão.
Year: 2018
Number Pages:
408-411pp.
Author(s): Giollo, R; Falcão Silva, M. J.; Lemos, R.; Couto, P.
Editor: Instituto Hidrográfico
Keywords: Marítimo-portuárias; Obras de proteção; Quebra-mares de talude; Análise multicritério
Info
Análise multicritério para apoio à decisão em intervenções de obras marítimo-portuárias: Estudo de quebra-mares de talude de blocos de betão e enrocamento
A geografia marítima nem sempre proporciona à costa um ambiente seguro para a instalação e manutenção de portos. Com este propósito, constroem-se obstáculos estruturais capazes de proteger o porto contra a agitação marítima, permitindo que as embarcações executem com segurança e eficiência as operações portuárias.Os quebra-mares de talude são as estruturas de proteção marítimo-portuárias mais frequentes em Portugal e estão sujeitos à ação de intempéries e agitação marítima intensa, requerendo obras de manutenção periódicas que garantam o seu funcionamento adequado. No entanto, devido ao elevado valor associado às reparações e/ou reabilitações e à envergadura deste tipo de obras, nem sempre é possível que as intervenções sejam realizadas de forma completa.As informações técnicas, relativas às intervenções em quebra-mares de talude, estão registadas na base de dados de Análise de Observação Sistemática de Obras Marítimas (ANOSOM), uma ferramenta de diagnóstico de estruturas marítimas de proteção portuária e de embocaduras, desenvolvida em MS ACESS pelo Laboratório Nacional de Engenharia Civil (LNEC), a qual mantém uma ampla biblioteca de registos originados em observações regulares de obras marítimas portuguesas, desde o ano de 1995 até à atualidade.As metodologias de análise de multicritério contribuem de forma significativa para a maximização do impacto dos investimentos, proporcionando a tomada de decisões de forma eficiente, no que tange a priorização das intervenções diretamente relacionadas com a vida útil da estrutura e com o seu correto funcionamento.O estudo contido na presente comunicação tem por objetivo propor a utilização de metodologias de análise multicritério para apoio à decisão, através do levantamento de diversos critérios, submetidos a avaliação de especialistas neste tipo de infraestruturas.
Year: 2018
Number Pages:
10p.
Author(s): Giollo, R; Falcão Silva, M. J.; Lemos, R.; Couto, P.
Editor: GPBE/ IST
Keywords: Quebra-mares de talude; Obras de proteção marítimo-portuárias; Análise multicritério
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Application of scanning techniques for damage analysis in rubble mound breakwaters
Damage evolution in rubble mound breakwaters is one of the key issues in coastal engineering, in particular their design, linked to maintenance and preventive strategies. One of the major challenges is to determine how the lower parts of the breakwaters evolve under sea states. The settlements and movements in this area are responsible of the evolution in the medium and upper parts, in particular the active zone, that are finally the areas where the initial damage and destruction are produced. To analyze these zones, scanning methodologies are increasing their application, specially to determine more precisely the initial movements of the pieces, porosity evolution and damage.This paper presents the application of a scanning device, a Kinect® system, both to analyze a rock armour and Antifer protection in 2D tests conducted in two facilities: LNEC (Portugal) and CITEEC (University of A Coruña, Spain). The analysis presents the initial approach to the validation process and calibration errors, and comparison with existing formulae. The comparison was done only in the initial and final steps, so no water was present in the flume when scanning. Further work is actually developed with intermediate steps (and water), and 3D tests including a roundhead (RODBreak project, Hydralab+, H2020-INFRAIA-2014-2015. Project ID: 654110).
Year: 2018
Number Pages:
9p.
Author(s): Sande, J.; Laiño, E.; Peña, E.; Neves, M. G.; Lemos, R.; Figuero, A.; Reis, M. T. L. G. V.; Alvarellos, A.; Rabuñal, J. R.
Editor: IHCantabria
Keywords: Errors; Validation; Scanning; Damage; Breakwaters
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Avaliação do risco de galgamento no Porto de Leixões
Esta comunicação apresenta uma avaliação do risco de galgamento das estruturas de defesa marítima do Porto de Leixões, nomeadamente o quebra-mar norte e o quebra-mar sul.Recorrendo a previsões de agitação marítima em águas profundas fornecidas pelo modelo WAM, é feita a sua propagação com os modelos numéricos SWAN e DREAMS de modo a obter-se a caracterização da agitação marítima incidente nestas estruturas. Este trabalho assenta na utilização de dados de agitação marítima que cobrem um período de 38 anos (1979
Year: 2018
Number Pages:
15p.
Author(s): Costa, J.; Fortes, C. J. E. M.; Ferreira, J.; Pinheiro, L.; Reis, M. T. L. G. V.; Poseiro, P.
Editor: APRH
Keywords: Mapa de risco; Avaliação do risco; Galgamentos; Porto de Leixões
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Costa da Caparica: aplicação do modelo numérico XBEACH à avaliação do risco costeiro
Nesta comunicação descreve uma aplicação do modelo numérico XBEACH no cálculo do espraiamento, galgamento e consequente inundação de sete praias da zona da Costa da Caparica, concelho de Almada, recorrendo à metodologia desenvolvida no âmbito do projeto de investigação HIDRALERTA.Com base nos dados de 2007 a 2016 de agitação marítima ao largo, fornecidos pelo modelo de previsão da agitação marítima WAVEWATCH III, procede-se à transferência destes dados para locais em frente a cada uma das praias da Costa da Caparica, utilizando o modelo numérico SWAN, de modo a caraterizar o regime de agitação marítima nesses locais. De seguida, para o cálculo do espraiamento, galgamento e inundação, recorre-se ao modelo XBEACH, de previsão do efeito de tempestades marítimas na erosão e inundação de zonas costeiras. Os resultados numéricos obtidos para um conjunto de 4 tempestades e para as várias praias são comparados com valores calculados com base em fórmulas empíricas.Os resultados numéricos e das fórmulas empíricas apresentam uma concordância razoável em termos do nível máximo de inundação para a zona norte da Praia de São João da Caparica, o mesmo não se verificando nas zonas também protegidas por estruturas de defesa costeira.
Year: 2018
Number Pages:
14p.
Author(s): Pires, B.; Fortes, C. J. E. M.; Reis, M. T. L. G. V.; Ferreira, J.; Poseiro, P.
Editor: APRH
Keywords: Fórmulas empíricas; XBEACH; Inundação; Galgamento; Espraiamento; Costa da Caparica
Info
Damage progression in rubble-mound breakwaters scale model tests under different storm sequences
This paper describes the 2D physical model tests performed for a rock armour breakwater at LNEC´s facilities, under the framework of the HYDRALAB+ project. The aim of the present work was to evaluate damage evolution under different approaches of storm sequences, corresponding to different climate change scenarios. The tested wave conditions intended to simulate different sequences of water levels (low water and high water), significant wave heights and peak periods. Damage evaluation was based on the traditional visual method and on stereo-photogrammetric techniques. Results in terms of the non-dimensional damage parameter, the non-dimensional damage depth and the percentage of displaced armour units are compared for the different storm sequences.
Year: 2018
Number Pages:
10p.
Author(s): Lemos, R.; Neves, M. G.; Fortes, C. J. E. M.; Mendonça, A. C.; Capitão, R.; Reis, M. T. L. G. V.
Editor: 7th International conference on the application of physical modelling in coastal and port engineering and science
Keywords: Storm sequences; Climate change; Damage evolution; Physical model
Info
Damage progression in rubble-mound breakwaters scale model tests under different storm sequences
This paper describes the 2D physical model tests performed for a rock armour breakwater at LNEC´s facilities, under the framework of the HYDRALAB+ project. The aim of the present work was to evaluate damage evolution under different approaches of storm sequences, corresponding to different climate change scenarios. The tested wave conditions intended to simulate different sequences of water levels (low water and high water), significant wave heights and peak periods. Damage evaluation was based on the traditional visual method and on stereo-photogrammetric techniques. Results in terms of the non-dimensional damage parameter, the non-dimensional damage depth and the percentage of displaced armour units are compared for the different storm sequences.
Year: 2018
Number Pages:
10p.
Author(s): Lemos, R.; Neves, M. G.; Fortes, C. J. E. M.; Mendonça, A. C.; Capitão, R.; Reis, M. T. L. G. V.
Editor: IHCantabria
Keywords: Storm sequences; Climate change; Damage evolution; Physical model
Info
Damage progression in rubble-mound breakwaters scale model tests, under a climate change storm sequence
Understanding damage progression under future climate changes is of utmost importance for effective management of coastal defenses. Significant wave height, wave period, storm direction and water level have been considered the main design variables for coastal structures. Usually, physical model tests support the design of breakwaters considering different incident wave conditions that include also extreme events.This paper describes the two-dimensional (2D) physical model tests of a rock armor breakwater, performed at LNEC´s experimental facilities, under the framework of the HYDRALAB+ project. The aim of the present work was to evaluate damage evolution under future climate change scenarios, by using different damage evaluation techniques. The tested wave conditions simulated a storm sequence where two water levels (low water and high water) were considered, as well as an increase of the wave height. The water levels and the wave heights were chosen to simulate extreme events forecasted on climate change scenarios.Damage evaluation was based on the traditional counting method and on stereophotogrammetric techniques. Test results are presented in terms of the damage parameter S (Broderick & Ahrens, 1982) and in terms of the percentage of removed armor units. The analysis is focused on the damage progression during the scale model tests, for the imposed storm sequence.The damage presents an oscillating behavior with two main damage areas corresponding to the active zones for each level, due to the variation of the water level between low-water and highwater. This behavior differs significantly from that found for the common storm sequences usually tested, where the water level does not change.Both measuring techniques lead to an intermediate damage of the cross-section breakwater. However, the damage parameter assessment with the stereo-photogrammetric technique allows a more versatile evaluation, since it is possible to characterize damage in representative zones of the cross-section.
Year: 2018
Number Pages:
1855-1870pp.
Author(s): Fortes, C. J. E. M.; Lemos, R.; Mendonça, A. C.; Reis, M. T. L. G. V.
Editor: FURG
Keywords: Stereophotogrammetric techniques; Climate change; Rubble-mound breakwaters; Damage progression
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Effect of speed and depth variation on the interaction between two ships
This paper analyses the influence of water depth and speed variation in the hydrodynamic interaction between a navigating ship and a stationary one, using physical and numerical modelling. The passing ship is a self-propelled scale model of the
Year: 2018
Number Pages:
91-94pp.
Author(s): Pedro, F.; Santos, J. A.; Pinheiro, L.; Fortes, C. J. E. M.; Hinostroza , M.
Editor: Instituto Hidrográfico
Keywords: Ship motion; Ship interaction; Numerical model; Physical model; Wake waves
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Capítulo de Livro
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Multi-functional artificial reefs for coastal protection
N/A
Year: 2009
Number Pages:
153-210 pp.
Author(s): Voorde, M.; Antunes do Carmo, J.; Neves, M. G.
Editor: Ch. A. Hudspeth, T. E. Reeve
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Tese de Doutoramento
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Trapped-mode propagation along irregular coasts
N/A
Year: 1999
Number Pages:
159 p.
Author(s): Santos, J. A.
Editor: ******
Info
Probabilistic Assessment of the Safety of Coastal Structures
N/A
Year: 1998
Number Pages:
594 p.
Author(s): Reis, M. T.
Editor: ******
Info
Unsteady Nearshore Currents on Longshore Varying Topographies
N/A
Year: 1998
Number Pages:
346 p.
Author(s): Sancho, F. E.
Editor: ******
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Simulação da agitação irregular. Técnicas matemáticas
N/A
Year: 1973
Author(s): Carvalho, M. M.
Editor: ******
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Relatório Científico
Info
Demonstration and technical tours plan
A major objective of TRA LISBON 2022 Conference is to boost research and innovation capacity for the transport sector, throughout a full innovation cycle, from idea to market. Having this in view, the project
Year: 2022
Author(s): Batista, F. A.; Marecos, V.; Antunes, M. L.; Macedo, A. L.; Freire, A. C.; Capitão, R.; Arsénio, E.; Maia, L.
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Demonstration submission and selection guidelines
The demonstration area will be one of the main focus points of TRA LISBON 2022, presenting multifunctional spaces and being prepared to receive a large number of different types of on-site demonstrations (indoor and outdoor). On-line demonstrations will also be an option, allowing for the widest possible coverage of access for all the participants.The dedicated areas will allow for interactive demonstrations of technological innovations to be carried out by and for industry partners, researchers, and other stakeholders. Demonstrations are an excellent opportunity to introduce conference attendees in an engaging way, as well as to promote new contacts and promising business.
Year: 2022
Author(s): Freire, A. C.; Arsénio, E.; Macedo, A. L.; Antunes, M. L.; Capitão, R.; Belinha, M.
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Technical tours organization criteria and procedures report
According to the CSA project plan, WP5.2 task objective is to organize technical tours that feature attractive and interactive showcases aiming at engaging participants into novel technologies for all transport modes and enabling stakeholders and their companies to disseminate and even sell their products and applications to all interested parties.
Year: 2022
Author(s): Capitão, R.; Macedo, A. L.; Arsénio, E.; Antunes, M. L.; Freire, A. C.
Editor: TRA LISBON 2022
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Data Repository Rules. Deliverable 10.4
This report is part of HYDRALAB+ Work Package 10, which seeks to strengthen the coherence of experimental hydraulic and hydrodynamic research undertaken by the HYDRALAB+ partner organisations. It outlines the work carried out by Samui Design & Management Ltd, supported by HR Wallingford, in relation to the development of a data repository structure that can be adopted by participants of the HYDRALAB+ project.
Year: 2018
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data from physical modeling; Zenodo; Data repository structure
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Data Storage Report. RECIPE Task 8.2: Overtopping events in breakwaters under climate change scenarios
Reliable prediction of wave run-up/overtopping and structure damage is a key task in the design and safety assessment of coastal and harbor structures. Run-up/overtopping and damage must be below acceptable limits, both in extreme and in normal operating conditions, to guarantee the stability of the structure and the safety of people and assets on and behind the structure. The mean-sea-level rise caused by climate change and its effects on wave climate may increase the number and intensity of run-up/overtopping events and make the existing coastal/harbor structures more vulnerable to damage.Accurate estimates, through physical modelling, of the statistics of overtopping waves for a set of climate change conditions, are needed. The research project HYDRALAB+ (H2020-INFRAIA-2014-2015) gathers an advanced network of environmental hydraulic institutes in Europe, which provides access to a suite of environmental hydraulic facilities. They play a vital role in the development of climate change adaptation strategies, by allowing the direct testing of adaptation measures and by providing data for numerical model calibration and validation. The use of physical (scale) models allows the simulation of extreme events as they are now, and as they are projected to be under different climate change scenarios.The enclosed dataset refers to the experimental work developed at LNEC within HYDRALAB+ and considers 2D damage and overtopping tests for a rock armor slope, with four different approaches to represent storms. Data of free surface elevation, overtopping and damage is presented.
Year: 2018
Author(s): Fortes, C. J. E. M.; Mendonça, A. C.; Lemos, R.; Neves, M. G.; Reis, M. T. L. G. V.; Capitão, R.
Keywords: Climate change; Overtopping; Data repository
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Facilitating the re-use and exchange of experimental data. Task 10.1 Critical review. D10.2 Critical Review of data flux between laboratory models, numerical models and field case studies
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.2 of the HYDRALAB+ project, entitled
Year: 2018
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Field data; Numerical modeling data; Physical modeling data; Data flux
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Facilitating the re-use and exchange of experimental data. Task 10.2 Data Standards and Licenses. D 10.3 Data Standards Report
The HYDRALAB+ project is aimed at strengthening the coherence of experimental hydraulic and hydrodynamic research undertaken across its partner organisations. This report is D10.3 of the HYDRALAB+ project, entitled
Year: 2018
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Neves, M. G.; Capitão, R.; Lemos, R.; Reis, M. T. L. G. V.
Keywords: Data management options; Experimental data; Data formats
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Protocols for representing variability and unsteadiness in flume facilities. Deliverable Number 8.2
This deliverable is related to task 8.2
Year: 2018
Author(s): Mendonça, A. C.; Fortes, C. J. E. M.; Lemos, R.; Capitão, R.; Neves, M. G.; Reis, M. T. L. G. V.
Keywords: Extreme events; Climate change; Variability in flume facilities
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Sistema de previsão, alerta e gestão de riscos causados pela agitação marítima - Relatório inicial Arquitetura e características gerais do sistema para os portos de Madalena do Pico, São Roque do Pi
Neste relatório inicial são apresentadas a arquitetura e as caraterísticas gerais dos protótipos do sistema de previsão, alerta e gestão de riscos causados pela agitação marítima para os portos de Madalena do Pico, São Roque do Pico e Praia da Vitória. Os três protótipos em desenvolvimento têm por base uma arquitetura semelhante, com características distintas, nomeadamente no que respeita à localização dos dados de base, às malhas computacionais utilizadas e às características físicas das fronteiras, tanto no plano horizontal (interface terra-mar), como no vertical (batimetria dos fundos). Caracteriza-se o layout geral dos portos, bem como a sua morfologia e operabilidade.
Year: 2018
Author(s): Pinheiro, L.; Fortes, C. J. E. M.; Reis, M. T.; Poseiro, P.
Keywords: Porto de Praia da Vitória; Porto de São Roque do Pico; Porto de Madalena do Pico; Agitação marítima; Alerta e gestão de riscos; Sistema de previsão
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ANÁLISE TEMPORAL DE REGISTOS DA ELEVAÇÃO DA SUPERFÍCIE LIVRE E DE VELOCIDADE EM ENSAIOS EXPERIMENTAIS
N/A
Year: 2014
Number Pages:
107p.
Author(s): Ramos, A.; Gabriel. S.; Simão, J.; Passarinho, A.; Lemos, R.; Fortes, C. J. E. M.
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Relato da missão a Bruxelas (28 a 30 de Outubro de 1998) para participação na 10ª Reunião da Acção Concertada Added Value Services in VTMIS do Programa Comunitário de I&D TRANSPORTS . Relatório efe
N/A
Year: 1998
Number Pages:
3 p.
Author(s): Covas, J. A.
Editor: ******
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Short-term stochastic numerical and physical simulation of sea waves - Proposta de Projecto de Investigação apresentada ao Programa PRAXIS XXI, na área científica de Engenharia Civil
N/A
Year: 1998
Number Pages:
53 p.
Author(s): Capitão, R.; Pires Silva, A.; Medina, J. R.; Carvalho, M. M.
Editor: ******
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Transformações Não-Lineares de Ondas Marítimas em Zonas Costeiras - Proposta de Projecto de Investigação apresentada ao Programa PRAXIS XXI , na área científica de Engenharia Civil
N/A
Year: 1998
Number Pages:
50 p.
Author(s): Covas, J. A.; Fortes, C. J. E. M.
Editor: ******
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V Programa Quadro da União Europeia. Preparação da discussão dos Programas Específicos. Documento de trabalho da Comissão (COM (97) 553 Final). Grupo de Trabalho 6 Sustainable Mobility and Intermod
N/A
Year: 1998
Number Pages:
2 p.
Author(s): Covas, J. A.
Editor: ******
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Valores extremos da agitação marítima no Algarve - Proposta de Projecto de Investigação apresentado ao Programa de Intervenção nos Laboratórios do Estado (MCT-FCT), sub-projecto Valorização e Protec
N/A
Year: 1998
Number Pages:
11 p.
Author(s): Carvalho, M. M.; Capitão, R.
Editor: ******
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