Modelling wave-induced 3D non-homogeneous seabed response

Zhang, Chi; Sui, Titi; Zheng, Jinhai; Xie, Ming; Thanh, Nguyen Viet

doi:10.1016/j.apor.2016.10.008

Cited by 33 publications

(14 citation statements)

References 36 publications

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“…Most previous studies [28,29] have neglected the soil distribution gradient terms by simply adopting the assumption of a layered seabed. A few studies [30,33] considered the gradient terms when simulating the non-homogeneous seabed response; however, the corresponding effect was not quantitatively investigated. The study herein fills this gap by carefully examining the effect of the distribution gradient of soil properties on the dynamic response of a non-homogeneous seabed.…”

Section: Discussionmentioning

confidence: 99%

“…where S 1 is the distance from the interface to the middle line of the pile (Figure 9b), which is depth-dependent in this study. Note that Zhang et al [33] only adopted a linear wave theory in which wave transformations around the mono-pile were not considered. In this study, the non-homogeneous seabed response is investigated while considering wave reflection and diffraction.…”

Section: D Non-homogeneous Seabed Around a Mono-pilementioning

confidence: 99%

“…More recently, Chen et al [32] applied a 3D model for a non-homogeneous seabed, but they only considered the non-homogeneous properties and retained the gradient term in the vertical (z−) direction. Using the FD model equations, Zhang et al [33] developed a 3D numerical model for the non-homogeneous seabed response. Their study retained all the gradient terms of the soil parameters, but the gradient terms in the governing equations were not fully separated out.…”

Section: Introductionmentioning

confidence: 99%

“…This study focuses on the non-homogeneous seabed, in which the effects of the soil distribution gradient are emphasized. Compared with the authors' previous work in Zhang et al [33], the contributions of this study are summarized: (1) the distribution gradient terms of non-homogeneous soil properties are separated out on the basis of the original governing equations of the soil dynamic response; (2) the effects of the distribution gradient on the soil dynamic response (pore water pressures, soil effective stresses) and liquefaction are examined. In a word, the previous studies in Jeng and Lin [30] and Zhang et al [33] compared the soil responses between the homogeneous seabed and non-homogeneous seabed, while this study focuses on the non-homogeneous seabed and compares cases with and without the property distribution gradient terms.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the Soil Property Distribution Gradient on the Wave-Induced Response of a Non-Homogeneous Seabed

Sui

Wang

et al. 2019

JMSE

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The seabed is usually non-homogeneous in the real marine environment, and its response to the dynamic wave loading is of great concern to coastal engineers. Previous studies on the simulation of a non-homogeneous seabed response have mostly adopted a vertically layered seabed, in which homogeneous soil properties are assumed in the governing equations for one specified layer. This neglects the distribution gradient terms of soil property, thus leading to an inaccurate evaluation of the dynamic response of a non-homogeneous seabed. In this study, a numerical model for a wave-induced 3D non-homogeneous seabed response is developed, and the effects of the soil property distribution gradient on the wave-induced response of a non-homogeneous seabed are numerically investigated. The numerical model is validated, and the results of the present simulation agree well with those of previous studies. The validated model is applied to simulate an ideal two-dimensional (2D) vertical non-homogeneous seabed. The model is further applied to model the practical wave-induced dynamic response of a three-dimensional (3D) non-homogeneous seabed around a mono-pile. The difference in pore pressure and soil effective stresses due to the soil distribution gradient is investigated. The effects of the soil distribution gradient on liquefaction are also examined. Results of this numerical study indicate that (1) pore pressure decreases while soil effective stresses increase (the maximum difference of the effective stresses can reach 68.9 % p 0 ) with a non-homogeneous seabed if the distribution gradient terms of soil properties are neglected; (2) the effect of the soil property distribution gradient terms on the pore pressure becomes more significant at the upper seabed, while this effect on the soil effective stresses is enhanced at the lower seabed; (3) the effect of the soil distribution gradient on the seabed response is greatly affected by the wave reflection and diffraction around the pile foundation; and (4) the soil distribution gradient terms can be neglected in the evaluation of seabed liquefaction depth in engineering practice.

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Section: Discussionmentioning

confidence: 99%

Section: D Non-homogeneous Seabed Around a Mono-pilementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of the Soil Property Distribution Gradient on the Wave-Induced Response of a Non-Homogeneous Seabed

Sui

Wang

et al. 2019

JMSE

Self Cite

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“…However, not much consideration has been given to the oscillatory wave-induced seabed response around these structures. In most recent time, the numerous investigation on 3-dimensional numerical studies on wave-induced response around pile structures has focused most of their attention around the monopile structure [15][16][17][18][19][20][21]. However, some few studies have carried out on gravity-based support structure [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

3-Dimensional numerical study of wave-induced seabed response around three different types of wind turbine pile foundations

et al. 2019

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In this paper, preliminary study is conducted on oscillatory wave-induced seabed response around three configuration cases of pile support foundations applying a 3-dimensional integrated numerical model to study and comparatively analyzed them. In the past, numerous studies have been conducted into exploring the wave-seabed-structure interaction (WSSI) mostly around monopile. However, attention on other pile support structure foundations is minimal. In this present study, Reynolds-Average Navier-Stokes equations with k-turbulence closure as well as Biot's poroelastic theory are employed to govern the wave motion and porous seabed foundation respectively. The present numerical model is compared with available physical experimental data to determine its capability of simulating the WSSI around pile structures. Results analysis indicate that the impact of wave forces and wave pressure on the gravity-based support foundation is relatively higher than that of the monopile and tripod support pile due to the large peripheral area it occupied. Result of the momentary wave-induced liquefaction depth for the three configuration cases of pile structures at the upstream side in the seabed foundation shows that the tripod support pile has higher tendency resistance against wave-induced liquefaction, which may perhaps be due to the additional legs.

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Assessing soil fractal and sorting characteristics based on geostatistics and modeling approaches in a typical basin of North China plain

Dai

Wang

2021

Earth Sci Inform

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Modelling wave-induced 3D non-homogeneous seabed response

Cited by 33 publications

References 36 publications

Effects of the Soil Property Distribution Gradient on the Wave-Induced Response of a Non-Homogeneous Seabed

Effects of the Soil Property Distribution Gradient on the Wave-Induced Response of a Non-Homogeneous Seabed

3-Dimensional numerical study of wave-induced seabed response around three different types of wind turbine pile foundations

Assessing soil fractal and sorting characteristics based on geostatistics and modeling approaches in a typical basin of North China plain

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