Scour effects on vertical effective stresses and lateral responses of pile groups in sands

Jiang, Wenyu; Lin, Cheng

doi:10.1016/j.oceaneng.2021.109017

Cited by 11 publications

(3 citation statements)

References 36 publications

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“…discussed the influences of scattered wave on the vertical vibration characteristics of piles in layered media. Jiang and Lin 6 investigated the scour impacts on the vertical interaction behavior of the sand and pile group. It is noteworthy to mention that the dynamic response analysis of pile‐soil interaction system under moving loads has not been performed.…”

Section: Introductionmentioning

confidence: 99%

3D analytical modeling of moving‐loading induced pile‐group behavior in stratified cross‐anisotropic poroelastic water‐saturated soils based on two stage theory

Yang,

Jia

2024

Num Anal Meth Geomechanics

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The aim of this paper is to propose a two‐stage theory‐based analytical method for the dynamic performance of pile groups in layered poroelastic saturated cross‐anisotropic soils induced by moving loadings. Among them, the free‐field vibrational analysis of saturated soils is performed by the analytical element‐layer approach (ALEA) and Fourier transformation. Based on the free‐field response, the boundary element (BE) solution for the soil resistance at the soil‐pile interface is derived utilizing the two‐stage theory. Simultaneously, the finite element (FE) solutions for the pile shaft resistance and deformation of pile groups are derived based on the Timoshenko beam theory. Finally, the FE‐BE coupled dynamic equation for deformations and internal loadings of the soil‐pile system is obtained. Thereafter, the reliability of the proposed method is validated by comparing with existing solutions and FE data from ABAQUS. Based on the derived solutions, a comprehensive parametric study is performed to examine the effects of loading amplitude, force speed, soft soil‐layer stiffness, soil anisotropy, and pile length on the dynamic responses of pile groups.

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Section: Introductionmentioning

confidence: 99%

3D analytical modeling of moving‐loading induced pile‐group behavior in stratified cross‐anisotropic poroelastic water‐saturated soils based on two stage theory

Yang,

Jia

2024

Num Anal Meth Geomechanics

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“…In terms of scouring influence, with the help of three-dimensional finite element models of pile foundations and field tests, the effects of fluid-structure interactions on bridge pile foundations [1], scour depth and width concerning the responses of laterally loaded piles in soft clay [2], and scour holes on the lateral responses of piles [3] have been studied. In addition, Jiang et al [4] proposed a method for calculating the size of the scour hole. The influence of earthquakes, the nonlinear behavior of pile foundations [5,6], the pile-soil interaction of pile foundations under earthquake motions [7,8], and the liquefaction-induced settlement of buildings [9] have been studied.…”

Section: Introductionmentioning

confidence: 99%

Condition Diagnosis of Long-Span Bridge Pile Foundations Based on the Spatial Correlation of High-Density Strain Measurement Points

Liu

2021

Sustainability

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Pile foundations of long-span bridges are often deeply buried in soil, and their structural condition is difficult to accurately diagnose by conventional methods. To address this issue, a method for diagnosing the structural condition of bridge pile foundations based on the spatial correlation of high-density strain measurement points is proposed. The strain data of the high-density measurement points of a bridge pile foundation are obtained by using distributed optical fiber sensing technology based on Brillouin scattering, and then an algorithm for diagnosing the structural condition of the pile foundation based on geographically weighted regression analysis is presented. On this basis, aiming at the scour of the pile foundation of long-span bridges, an algorithm for estimating the scour depth of the pile foundation based on sliding plane clustering is proposed. Finally, the effectiveness of the proposed method is verified by numerical simulation and actual bridge data.

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“…Lin et al [14] demonstrated the importance of considering the stress history of cohesionless soil to accurately determine the lateral behavior of pile. Jiang et al [15] proposed an improved analytical method (IAM) to analyze laterally loaded pile groups in sand considering various scour hole dimensions. Liang et al [16] studied the effects of extreme scour on the buckling of bridge piles considering the stress history of soft clay.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Local and Combined (Global) Scours on Piers-on-Bank Bridges

et al. 2021

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This paper examines the scour problems related to piers-on-bank bridges resulting from frequently flooded and/or constricted waterways. While local scour problems for bridge piers in riverine channels have been addressed extensively in the literature, there have been few studies addressing piers-on-bank scour scenarios. A comprehensive three-dimensional finite element analysis using the element removal (ER) technique has been performed on a recently constructed bridge with an observable scour problem on multiple piers. The analysis is further extended to study the effect of “combined scour” or extensive erosion of soil between adjacent piles. Three different loading cases were considered in the study, and the results demonstrated that the effects of local and combined scours on bridge drilled shaft foundations can be significant under the combined actions of axial, lateral loads and bending moments. Specifically, the most critical case of combined scour is when maximum moment effect is applied to the piers. The results of this study show that the interaction of soil displacement fields between adjacent piles should be investigated for bridge crossings with piers-on-bank, with a high risk of flooding during the moderate-to-low probability of the occurrence of precipitation events, as they can increase the pile head displacements and the bending moments in the soil and result in the early failure of bridges.

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Scour effects on vertical effective stresses and lateral responses of pile groups in sands

Cited by 11 publications

References 36 publications

3D analytical modeling of moving‐loading induced pile‐group behavior in stratified cross‐anisotropic poroelastic water‐saturated soils based on two stage theory

3D analytical modeling of moving‐loading induced pile‐group behavior in stratified cross‐anisotropic poroelastic water‐saturated soils based on two stage theory

Condition Diagnosis of Long-Span Bridge Pile Foundations Based on the Spatial Correlation of High-Density Strain Measurement Points

An Analysis of Local and Combined (Global) Scours on Piers-on-Bank Bridges

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