Experimental study on irregular wave-induced pore-water pressures in a porous seabed around a mono-pile

Zhang, Qibo; Zhai, Hualing; Wang, Pandi; Shao-hua, Wang; Duan, Lei; Chen, Linya; Liu, Yifei; Jeng, Dong‐Sheng

doi:10.1016/j.apor.2019.102041

Cited by 24 publications

(13 citation statements)

References 34 publications

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“…The test cases are summarized in Table 3. It is noted that the considered frequencies, i.e., f = 0.1, 0.3 and 0.5 Hz, are the typical loading frequencies of energy rich waves [28]. Furthermore, the force outputs at all the considered displacement amplitudes are within the ultimate bearing capacity F u of the model foundation, as will be shown later.…”

Section: Test Casesmentioning

confidence: 73%

Model Test Study on Bearing Capacity and Deformation Characteristics of Symmetric Pile–Bucket Foundation Subjected to Cyclic Horizontal Load

Wang

et al. 2021

Symmetry

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The pile–bucket foundation that features a bucket slipped onto a monopile is a new type of symmetric offshore foundation supporting the wind turbine. Its load bearing and deformation resistance capacity are unclear, especially when subjected to cyclic horizontal loadings. In this paper, a model test has been designed and carried out for investigating the cyclic behavior of the pile–bucket foundation embedded in soft marine clay. Cyclic horizontal loads are applied in a displacement-controlled manner with different amplitudes and frequencies. The influences of cyclic loading parameters, including the amplitude, the frequency and the cycle number, have been studied from the perspectives of stiffness-degradation and damping effect that are evaluated from the recorded horizontal force–displacement relationships at the loading point. In addition, the influences of cyclic horizontal loading on the bending moment distribution and on the p–y curve have been presented and discussed. The results show that significant reductions in the foundation stiffness and in the soil resistance may be observed during the first few cycles when the loading displacement is relatively high.

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Section: Test Casesmentioning

confidence: 73%

Model Test Study on Bearing Capacity and Deformation Characteristics of Symmetric Pile–Bucket Foundation Subjected to Cyclic Horizontal Load

Wang

et al. 2021

Symmetry

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“…Bring the selected initial value x k = [z k , α k , β k ] T into the Jacobian matrix on the left and right of the (24), and use the method of solving the linear equation system to obtain the value of the error vector δ, and then solve according to (22) to get x k+1 . This solution is better than x k .…”

Section: B Inverse Kinematicsmentioning

confidence: 99%

“…This solution is better than x k . Then use x k+1 as the initial value to repeat the solution and use (24) to correct it, and iterate repeatedly until f (x k+r ≤ ε). ε is the predetermined deviation value, and the corresponding x k+r = [z k+r , α k+r , β k+r ] T is the result of the solved kinematics solution for the given length of the limb.…”

Section: B Inverse Kinematicsmentioning

confidence: 99%

“…Luo et al [22] propose a coupling type parallel platform, which utilizes the coupling characteristics of a marine vessel to apply the platform to a landing of a Marine helicopter. To further study the motion of cargo and ship in the marine environment, the Pierson-Moscowitz (P-M) spectrum [23], [24] can be used to construct the ocean wave model. This article studies the kinematics analysis of 3UPU_UP coupled parallel platforms in the marine environment.…”

Section: Introductionmentioning

confidence: 99%

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Kinematics Analysis of 3UPU_UP Coupling Parallel Platform in the Marine Environment

Xiong

Tang

2020

IEEE Access

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A study of the kinematic characteristics of a 3UPU_UP coupling parallel platform that has three-degree-of-freedom(3-DOF). In this article, a novel 3UPU_UP parallel platform is presented, which is based on the 5-DOF 3UPU parallel platform by adding a UP followed limb. The DOFs and motion constraints of the platform are analyzed by the screw theory, and the coupling constraint equation of the platform is obtained through coordinate transformation. The inverse kinematics equation of the platform is derived by the closed-loop method, and the forward kinematics equation of the platform is solved by Netwon-Rapson iteration. The trajectory of the platform in space is obtained and the correctness of the coupling constraint equation of the platform in other DOFs is verified. Considering that the motion of a ship on the sea is multi-DOF and complicated, the motion of the cargo on the ship can be compensated by using a coupling characteristic of the platform to improve the safety of marine operations. INDEX TERMS 3UPU_UP parallel platform, coupled constraint equation, Kinematic analysis, ocean wave model.

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“…As the most commonly-used infrastructure for marine structures, pile foundations have been intensively studied, as the dynamic seabed response around a single pile could greatly affect the stability of offshore structures. A series of experimental studies in terms of the soil response around embedded mono-pile under the loading of regular waves [10], regular waves plus current [11,12], irregular waves [13] and breaking waves [14] were conducted in a specially-designed flume. With the aid of numerical analysis methods, Li et al [15] used the finite element software ABAQUS to analyse the variation law of pore water pressure near the single pile, not accounting for the influence of wave reflection and diffraction.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Modelling of Non-Linear Wave-Induced Seabed Response around Offshore Open-Ended Pile

Liu

Chen

Li³

et al. 2021

JMSE

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This paper analyses the fluid–seabed–structure interactions (FSSI) around the open-ended pile by applying the in-house solver established on the open-source Computational Fluid Dynamics (CFD) platform. The Reynolds-averaged Navier–Stokes (RANS) equations are solved to simulate the hydrodynamic interactions between waves and open-ended piles. Biot’s poro-elastic theory (quasi-static model) is used to reproduce the wave-induced seabed responses. The parameter analysis indicates that the wave period, degree of saturation of seabed and pile diameter have a great influence on the development of the transient seabed liquefaction depth around the pile. In addition, the distribution of the pore water pressure vs soil depth in the inner zone of the pile presents a “V” shape rotated 90 degrees counterclockwise.

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Experimental study on irregular wave-induced pore-water pressures in a porous seabed around a mono-pile

Cited by 24 publications

References 34 publications

Model Test Study on Bearing Capacity and Deformation Characteristics of Symmetric Pile–Bucket Foundation Subjected to Cyclic Horizontal Load

Model Test Study on Bearing Capacity and Deformation Characteristics of Symmetric Pile–Bucket Foundation Subjected to Cyclic Horizontal Load

Kinematics Analysis of 3UPU_UP Coupling Parallel Platform in the Marine Environment

Three-Dimensional Modelling of Non-Linear Wave-Induced Seabed Response around Offshore Open-Ended Pile

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