Nonlinear wave interaction with curved front seawalls

Chowdhury, S. De; Anand, K.V.; Sannasiraj, S. A.; Sundar, V.

doi:10.1016/j.oceaneng.2017.05.015

Cited by 12 publications

(5 citation statements)

References 37 publications

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“…Furthermore, introducing these overhangs with the existing structure could reduce the freeboard depth [19]. In addition, the benefits of altering the seaward shape of the seawall for efficient reduction of overtopping along with the reduction of impact force experienced by the coastal structure due to the wave loads have been investigated by many-c.f., [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

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It is more common to introduce the parapet/recurve/wave return wall over the existing structure, such as a vertical seawall or composite structure, to reduce the overtopping efficiently. The advantage of a recurve wall on top of the sea wall has been studied in the past in regards to wave interaction and overtopping. However, their efficiency in protecting the inland structure during extreme events such as flooding during a tsunami is unexplored. The present study addresses the effect of a vertical seawall with recurve in reducing the dam break surge simulating tsunami-induced forces on an inland structure. The study compares the momentum transferred on the landward structure behind a Vertical seaWall (VW) and a vertical wall with the Large ReCurve on the top (LRC) during overtopped conditions. The outcome from the numerical simulation shows an insignificant contribution due to the LRC in reducing the force on the inland structure compared to the VW, albeit delaying the impact time. However, the LRC performed slightly better in the case of a low-rise wall located near the inland structure than the VW. Furthermore, a low-rise VW increases the force and overturning moment on the inland structure compared to no-wall conditions. Both the LRC and the VW reduced the horizontal force on the structure linearly with the increase in height. An exponential decrease in the overturning moment was observed on the landward structure with the increase in the height of the VW or the LRC. Design equations are proposed for the forces and overturning moment reduction based on the height of the VW or the LRC.

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Section: Introductionmentioning

confidence: 99%

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

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“…Additional research has undertaken numerical simulations of the propagation, impinging, and overtopping of solitary waves on sloped beaches [22,23]. A comparative study by De Chowdhury et al [24] between two numerical models, the Smoothed Particle Hydrodynamics and ANSYS Fluent software, noted a comparable level of performance between these models.…”

Section: Introductionmentioning

confidence: 99%

“…[26], and Luo et al [27] have scrutinized the impact and surge of a solitary wave over a seawall, adopting the configuration presented by Hsiao and Lin [12]. A series of wave overtopping tests have been executed by Prabu et al [22][23][24][25][26][27][28][29] to explore the propagation, impinging, and overtopping of tsunamis. The decrease in overtopping corresponding to an increase in wall slope was amongst their key findings.…”

Section: Introductionmentioning

confidence: 99%

Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Chergui,

Bouzit

2023

IJSSE

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The urgent necessity to fortify coastal regions and safeguard both the natural environment and key coastal infrastructure underscores the significance of structural measures in coastal engineering. Among these, the seawall reigns as the primary fortification method. This study aims to elucidate the impact of a stepped structure on the propagation and overtopping of solitary waves when they encounter an impermeable seawall. The investigation has been conducted using ANSYS Fluent, a widely recognized commercial software. Although previous researchers have extensively used the two-dimensional volume of fluid (VOF) model, based on the Reynolds-Averaged Navier-Stokes (RANS) equations and the k-ε turbulence closure solver, this study fills the gap in the understanding of the stepped structure's effect. It shows a commendable agreement with experimental results, proving its reliability. Simulations were executed with varied configurations of stepped structures (Step width Sw=0.6 m, 1.2 m, 1.8 m, and Step height Sh=0.3 m, 0.6 m, 0.9 m), emulating tsunami waves of constant wave height and water depth over a stepped structure on a 1:20 sloped beach. Initially, the accuracy of the results was substantiated by comparing them with experimental and numerical data of the free surface and the distribution of the pressure field on the seawall. Numerical simulations, incorporating varying wave heights, water depths, and step heights, were performed to scrutinize the evolution of waves and the pressure exerted by waves impacting the seawall.

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“…Also, the actual impact forces at the site are always less than that measured in laboratories (Cuomo et al) 5 . Hence, a realistic numerical simulation of waves in ANSYS Fluent is expected to predict the pressures reasonably well 6–8 . A seawall with rubcrete has not been analyzed until now, either numerically or experimentally.…”

Section: Introductionmentioning

confidence: 99%

Toughness performance of rubcrete seawalls

Raj

Chelsea

Nagarajan

2020

Mat Design & Process Comms

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Seawalls are structures built parallel to the shoreline as a reinforcement of a part of the coastal profile. Seawalls are generally subjected to impact loads due to wave impact. In order to withstand the impact loads, the concrete seawalls should possess sufficient impact resistance. The use of crumb rubber particles as a replacement of aggregates improves the energy absorption capacity of the concrete structure. The use of rubcrete in concrete seawalls has not been tried in the past. So, this paper presents the feasibility study of using rubcrete in the concrete seawall by assessing the toughness of rubcrete seawalls. The impact strength of seawall was assessed for rubcrete seawalls by replacing 5%, 10%, and 15% of fine aggregate by crumb rubber. Numerical wave simulation was carried out in ANSYS Fluent, and the wave was coupled to the structure by one‐way fluid–structure interaction. The results presented in the paper indicate that the addition of crumb rubber up to 15% shows enhanced toughness performance.

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Nonlinear wave interaction with curved front seawalls

Cited by 12 publications

References 37 publications

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Toughness performance of rubcrete seawalls

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