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van der Vegt, N. (author), Klerk, W.J. (author), Peters, D.J. (author), van Gent, M.R.A. (author), Hofland, Bas (author)Initial damage, caused by previous wave loading or other events, might affect the hydraulic stability of pattern-placed revetments. Three common types of damage are considered in this study. The effect of this assumed initial damage on the hydraulic stability and failure probability of revetments is quantified using a FEM model. This model is...journal article 2024
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de Almeida Sousa, E. (author)Hydraulic structures are crucial for navigation, water management and flood protection in low-lying coastal and delta regions. Their importance is expected to continue growing in the coming years, because of the consequences of climate change and the continuous development and urbanization of these regions combined with more strict safety...doctoral thesis 2023
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Scharnke, Jule (author), van Essen, S.M. (author), Seyffert, Harleigh C. (author)In the assessment of wave-in-deck loads for new and existing maritime structures typically model tests are carried out. To determine the most critical conditions and measure sufficient impact loads, a range of sea states and various seeds (realisations) for each sea state are tested. Based on these measurements, probability distributions can...journal article 2023
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Holkema, K. J. (author), Aalbers, C. (author), Wellens, P.R. (author)In head waves, water jet impacts due to run up can occur as a result of the structural configuration of some floating structures, reducing workability. Wave attenuation near the floater may reduce the risk of water jet impacts. This paper presents a numerical study of the performance and attenuation mechanisms of various plate type fixed free...journal article 2023
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van Essen, S.M. (author), Scharnke, Jule (author), Seyffert, Harleigh C. (author)For the design of maritime structures in waves, the extreme values of responses such as motions and wave impact loads are required. Waves and wave-induced responses are stochastic, so such responses should always be related to a probability. This information is not easy to obtain for strongly non-linear responses such as wave impact forces....journal article 2023
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Tieleman, O.C. (author)Flood gates form an essential part of many flood defence systems in coastal areas. During storm events, these gates are subjected to extreme loads from various sources. This dissertation addresses the dynamic behaviour of flood gates induced by wave impacts. A semi-analytical fluid-structure interaction model is developed to predict vertical...doctoral thesis 2022
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Kleiberg, T.N.J. (author), Tieleman, Orson (author), Versluis, Marco (author), Kortlever, Wim (author), ten Oever, Erik (author), Hofland, Bas (author)This paper presents a novel design method to predict fatigue of flood gates due to dynamic wave loading. The accumulation of fatigue damage is predicted probabilistically over the entire lifetime of the structure rather than with a set of normative events. Load events are defined using a joint probability distribution of historical wind and...journal article 2022
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van Meerkerk, M. (author)The prospect of stricter national and international emission standards for the shipping industry are a driving force in the search for alternative shipping fuels, such as liquefied natural gas (LNG). However, new challenges arise with the widespread use of LNG. For example, there is a desire to use LNG cargo containment...doctoral thesis 2021
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de Almeida Sousa, E. (author), Hofland, Bas (author)This study focuses on standing wave impacts on vertical hydraulic structures with relatively short overhangs. It addresses the demand for extended knowledge and loading prediction expressions for these structures. Based on laboratory experimental data from 146 tests, this paper works on two complementary objectives. Firstly, this study extends...journal article 2021
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Bakker, W. (author), Hofland, Bas (author), de Almeida Sousa, E. (author), Oldenziel, G. (author), Overmars, E.F.J. (author)In this paper the development of a high-power pulsed LED line light and its use to apply particle image velocimetry (PIV) during wave impact measurements are described. An electrical circuit that generates high-current pulses is designed and built, which is used to overdrive a number of commercially available LEDs. The limit for this...journal article 2021
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Pappas, Athanasios (author), D'Ayala, Dina (author), Dassanayake, Darshana T. (author), Antonini, A. (author), Raby, Alison (author)This study describes the structural response of historic lighthouses to extreme wave impacts. Located offshore on exposed rocks, 19th Century lighthouses were built with large interlocked granite blocks and have survived weathering for nearly two centuries. Under extreme wave impacts, lighthouses of this structural typology may uplift and...journal article 2021
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Tieleman, Orson (author), Hofland, Bas (author), Tsouvalas, A. (author), de Almeida Sousa, E. (author), Jonkman, Sebastiaan N. (author)This paper establishes a computationally efficient model to predict flood gate vibrations due to wave impacts including fluid–structure interaction. In contrast to earlier models, composite fluid domains are included to represent the situation of a flood gate in a dewatering sluice with the presence of an overhang that causes the confined-wave...journal article 2021
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Gruwez, Vincent (author), Altomare, Corrado (author), Suzuki, T. (author), Streicher, Maximilian (author), Cappietti, Lorenzo (author), Kortenhaus, Andreas (author), Troch, Peter (author)Three open source wave models are applied in 2DV to reproduce a large-scale wave flume experiment of bichromatic wave transformations over a steep-sloped dike with a mildly-sloped and very shallow foreshore: (i) the Reynolds-averaged Navier–Stokes equations solver interFoam of OpenFOAM® (OF), (ii) the weakly compressible smoothed particle...journal article 2020
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de Almeida Sousa, E. (author), Hofland, Bas (author)The applicability of pressure-impulse theory is evaluated for predicting wave impact loading magnitudes for non-breaking standing wave impacts on vertical hydraulic structures with relatively short overhangs. To this end, tests were carried out on a schematized but realistic configuration with low steepness regular wave impacts on a straight...journal article 2020
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van Meerkerk, M. (author), Poelma, C. (author), Hofland, Bas (author), Westerweel, J. (author)We present an experimental study on the variation in wave impact location and present a mechanism for the development of free surface instabilities on the wave crest for repeatable plunging wave impacts on a vertical wall. The existence of free surface instabilities on an impacting wave is well known, but their characteristics and formation...journal article 2020
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Gruwez, Vincent (author), Altomare, Corrado (author), Suzuki, T. (author), Streicher, Maximilian (author), Cappietti, Lorenzo (author), Kortenhaus, Andreas (author), Troch, Peter (author)In this paper, a Reynolds-averaged Navier-Stokes (RANS) equations solver, interFoam of OpenFOAM®, is validated for wave interactions with a dike, including a promenade and vertical wall, on a shallow foreshore. Such a coastal defence system is comprised of both an impermeable dike and a beach in front of it, forming the shallow foreshore...journal article 2020
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de Almeida Sousa, E. (author), Hofland, Bas (author)This study focusses on increasing the understanding on vertical hydraulic structures with relatively short overhangs subjected to standing wave impacts. To this end, the impact velocity and the entrapped air are studied in detail, given their influence on the impulsive loading characteristics and consequently on the structural dynamic response....journal article 2020
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Hofland, Bas (author), Passos, Marlon (author), de Almeida Sousa, E. (author)Flood gates in storm surge barriers or outlet sluices can be prone to violent wave impacts. When an obstruction is present at the sea side above the gate, confinement of the incoming waves can lead to impulsive wave loads, even when the waves are non-breaking. The large loads can increase the stresses in the gate and structure considerably. One...conference paper 2019
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de Almeida Sousa, E. (author), Hofland, Bas (author), Jonkman, Sebastiaan N. (author)The study of wave impact physics and magnitudes are key for the design of vertical coastal hydraulic structures. This research addresses the study of standing wave impacts on vertical coastal hydraulic structures with a relatively short horizontal overhang, which is especially relevant for structures such as lock gates, sluice gates, dewatering...conference paper 2019
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Tieleman, Orson (author), Tsouvalas, A. (author), Hofland, Bas (author), Peng, Y. (author), Jonkman, Sebastiaan N. (author)A model is developed to predict bending vibrations of flood gates with fluid on both sides. The liquid flow is three-dimensional and the gate is represented as a thin plate. The fluid response is considered within the linear potential flow theory including the effect of compressibility and the generation of free surface waves. This way, the...journal article 2019
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