Wave‐induced soil response in an unsaturated anisotropic seabed of finite thickness

Hsu, John R. C.; Jeng, Dong‐Sheng

doi:10.1002/nag.1610181104

Cited by 289 publications

(191 citation statements)

References 12 publications

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“…(5) for a set of soil and wave properties. It is apparent that numerical results excellently coincide with the previous analytical solution [22]. This is the numerical model developed to investigate the influence of wave angle of incidence on seabed responses near a submarine buried pipeline.…”

Section: Validationsupporting

confidence: 73%

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3D Modeling of Wave-Seabed-Pipeline in Marine Environments

Shabani¹,

Jeng²

2008

TOCIEJ

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Abstract:In this study, a three-dimensional numerical model is developed, based on the Finite Element Method, to analyse the behaviour of soil under the wave loading. The pipeline is assumed to be rigid and anchored within a trench. The influence of wave obliquity on seabed responses, the pore pressure and soil stresses, are studied, which cannot be handled by the existing 2D models. It is revealed that three-dimensional characteristics systematically affect the distribution of soil response around the circumference of the underwater pipeline. Based on new 3D model, the effects of wave and soil characteristics and trench configuration on the wave-induced seabed instability are discussed in detail.

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Section: Validationsupporting

confidence: 73%

“…For this purpose, a possible option is to consider the simplified case of the wave-induced response of a seabed in the absence of a structure. The exact solution for the interaction between a progressive wave and the naked seabed has been proposed by Hsu and Jeng [22].…”

Section: Validationmentioning

confidence: 99%

3D Modeling of Wave-Seabed-Pipeline in Marine Environments

Shabani¹,

Jeng²

2008

TOCIEJ

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“…1664 Lagrangian brick elements of 27-noded are used in the analysis, and the finite element mesh. An excellent agreement between the numerical results (solid symbols and lines) and the analytical solution (hollow symbols and lines) [6] is shown in Fig. 2.…”

Section: Validationssupporting

confidence: 61%

“…First, a 3D linear elastic analysis on wave-induced soil response in finite thickness soil bed was performed and the numerical results were compared with the analytical solution [6]. All degrees of freedom at the two ends of the seabed are totally tied to form a repeated boundary condition appropriately reflecting the infinite lateral extent of the seabed.…”

Section: Validationsmentioning

confidence: 99%

Three-dimensional poro-elasto-plastic model for wave-induced seabed response around submarine pipeline

Zhang

Han

2015

Soil Dynamics and Earthquake Engineering

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a b s t r a c tThe evaluation of the wave-induced excess pore pressure around a buried pipeline is particularly important for pipeline engineers involved in the design of offshore pipelines. Existing models for the wave-induced seabed response around submarine pipeline have been limited to poro-elastic soil behavior and de-coupled oscillatory and residual mechanisms for the rise in excess pore water pressure. To overcome the shortcoming of the existing models, in this study a three-dimensional poro-elastoplastic soil model with submarine pipeline is established, in which both oscillatory and residual mechanisms can be simulated simultaneously. With the proposed model, a parametric study is conducted to investigate the relative differences of the predictions of the wave-induced pore pressure with poro-elasto-plastic model. Based on numerical examples, it can be concluded that the poro-elastoplastic behaviors of soil have more significant influence on wave-induced pore pressure of seabed around submarine pipeline. As the seabed depth increases, the normalized pore pressures decrease rapidly at the upper part of seabed, and then change slightly at the lower part of the seabed. Soil permeability and wave period have obvious influence on the wave-induced normalized pore pressure.

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“…On the basis of the three-dimensional (3D) consolidation theory of Biot, 2 Yamamoto et al 3 developed a semi-analytical solution for wave-induced seabed response in a seabed of infinite thickness. Later, Hsu and Jeng 4 obtained a closeform analytical solution for wave-induced seabed response in a seabed of finite thickness. In addition to 1 theoretical studies, many experimental studies have also been carried out.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of wave-driven pore-water pressure and wave attenuation in a sandy seabed

Zhang

Ding

et al. 2016

Advances in Mechanical Engineering

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Wave-seabed interaction has become a big concern of coastal researchers and engineers in the past decades as it may largely contribute to the seabed instability and failure of marine foundations. A series of laboratory experiments are carried out in a wave flume to study the wave-driven pore-water pressure in a sandy seabed and the attenuation of wave height. Waves propagating over a sandy seabed lead to oscillatory excess pore-water pressures within the porous seabed. Amplitude of pore-water pressure within the seabed decreases toward the bottom. A phase lag of pore-water pressure is clearly observed, and it contributes to net upward pressure related to seabed instability. Height of the incident wave is reduced as part of wave energy is dissipated by bottom friction, and a maximum attenuation of the incident wave height is up to 7.23% in the experiments. The influences of wave period and height of the incident wave on porewater pressure and wave attenuation are also analyzed and discussed.

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Wave‐induced soil response in an unsaturated anisotropic seabed of finite thickness

Cited by 289 publications

References 12 publications

3D Modeling of Wave-Seabed-Pipeline in Marine Environments

3D Modeling of Wave-Seabed-Pipeline in Marine Environments

Three-dimensional poro-elasto-plastic model for wave-induced seabed response around submarine pipeline

Experimental investigation of wave-driven pore-water pressure and wave attenuation in a sandy seabed

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