Numerical Analysis on Stability of Caisson-Type Breakwaters under Tsunami-Induced Seepage

Sawada, Yutaka; Miyake, Michio; Miyamoto, Junji; Kawabata, Toshinori

doi:10.1007/s40515-015-0022-y

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Sawada et al. 9 carried out a study based on the Discrete Element Method (DEM) to examine the stability of a caisson breakwater, in which particles were used to represent the rubble mound. Latham et al.…”

Section: Introductionmentioning

confidence: 99%

“…For this purpose, various computational approaches are proposed to analyze the motion of caisson and armour units. Sawada et al 9 carried out a study based on the Discrete Element Method (DEM) to examine the stability of a caisson breakwater, in which particles were used to represent the rubble mound. Latham et al 10 combined DEM and computational fluid dynamics (CFD) to analyze the wave dynamics of a granular solid skeleton.…”

Section: Introductionmentioning

confidence: 99%

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Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Ding

Ouahsine

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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A numerical study using the Discontinuous Deformation Analysis (DDA) method is proposed to analyze the effect of the caisson sliding subjected to a hydrodynamic loading in the stability of the rear side of the caisson-type breakwater. The study takes into account the slope inclination of the breakwater as well as the contact between the armour units constituting the shoreward of the breakwater, where the contact stresses are imposed through a penalty method. A dimensionless displacement parameter, [Formula: see text], is defined to investigate the instability of armor units. The results of the simulation show that the shape of the armour units plays an important role in the stability of the breakwater, where the tetrapods and the acropods give better stability than the cubic shapes, with a clear superiority of the tetrapods. They also show that the reduction in the slope clearly contributes to the stability of caisson up to a slope of 1: 2, but below this ratio of 1: 2 this stability is no longer obvious. Furthermore, a new relation of the displacement of the armour units according to the slope is established.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Ding

Ouahsine

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Remarkable progress has been made in the past 20 years on the aspect of numerical analysis. Many scholars have studied the stability of various types of breakwaters and the dynamic response of their seabed foundation by adopting elastoplastic finite element model developed by themselves or the commercial companies [6][7][8][9][10][11][12][13]. However, the deformable seabed foundation was often regarded as a permeable but rigid medium in these models.…”

Section: Introductionmentioning

confidence: 99%

Physical Modeling of the Stability of a Revetment Breakwater Built on Reclaimed Coral Calcareous Sand Foundation in the South China Sea—Regular Wave

2021

Applied Sciences

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In the past several years, a series of artificial islands have been constructed on the top of coral reefs by China in the South China Sea by way of reclamation. A large number of revetment breakwater also has been built along the margin of these artificial islands. The stability of these revetment breakwater is the precondition for the normal service performance of these reclaimed coral sand islands. In this study, taking the reclamation engineering in the South China Sea as the background, a series of wave flume physical model tests (geometrical similarity scale is set to 1:10) are performed to investigate the dynamics and the stability of the revetment breakwater and its reclaimed coral sand foundation under the impact of regular wave. Experimental results show that the revetment breakwater has a maximum final settlement of 6 mm if built on loose coral sand foundation. Furthermore, there is indeed excess pore pressure generated in the reclaimed coral foundation with a maximum magnitude of 1.5 kPa. It is found that the excess pore pressure has not caused liquefaction in the coral sand foundation due to the fact that the accumulation of excess pore pressure only occurred in the first 10 cycles of wave loading. Finally, it is concluded that the revetment breakwater and its reclaimed coral sand foundation basically are stable under regular wave impacting. However, excessive water overtopping would be a potential threat for the vegetation behind the breakwater, as well as for the desalinated underground water of the reclaimed lands.

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Physical modeling of the dynamics of a revetment breakwater built on reclaimed coral calcareous sand foundation in the South China Sea—tsunami wave

2021

Bull Eng Geol Environ

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Numerical Analysis on Stability of Caisson-Type Breakwaters under Tsunami-Induced Seepage

Cited by 6 publications

References 7 publications

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Physical Modeling of the Stability of a Revetment Breakwater Built on Reclaimed Coral Calcareous Sand Foundation in the South China Sea—Regular Wave

Physical modeling of the dynamics of a revetment breakwater built on reclaimed coral calcareous sand foundation in the South China Sea—tsunami wave

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