Investigation on the behavior of hybrid pile foundation and its surrounding soil during cyclic lateral loading

Li, Lichen; Líu, Hao; Wu, Wenbing; Wen, Minjie; Naggar, M. Hesham El; Yang, Yuzhe

doi:10.1016/j.oceaneng.2021.110006

Cited by 47 publications

(13 citation statements)

References 19 publications

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“… 32 , 33 The experiments studies were usually conducted using model tests on a model pile with several colored sand bands preset around, which was used to highlight the sand migration pattern. 34 , 35 It was found that the sand moved towards the pile at the initial stage of loading, and the movement continued throughout the loading process. Eventually, the soil will be divided into convective zone and static zone.…”

Section: Introductionmentioning

confidence: 99%

Bearing and deformation characteristics of monopile foundation under monotonic and cyclic horizontal loads

Ma,

Xu,

Fan

et al. 2024

Science Progress

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The bearing and deformation characteristics of monopile foundation under the monotonic and cyclic loads are key factors to consider in the design of the transmission tower structure or offshore wind energy converters. The model tests and numerical simulations of monopile foundation under monotonic and cyclic horizontal loads were performed in sand to explore the bearing characteristics and the deformation characteristics of pile. The potentially affected factors including loading height, relative density of soil, displacement amplitude were analyzed. The results show that with the loading height varies from 1 D to 4 D, the horizontal static bearing capacity of the pile under different the soil relative density decreased by 1.63–1.9 times, and the peak bending moment increased by 22.9%–36.8%. Under the cyclic loads, the peak load on the pile top increased by 31.7%–56.1% for each 1 mm increase in displacement amplitude. The stiffness of soil around pile varies as the number of cycles increases with the development trend of decreases first and then increases gradually. As the horizontal load and cycle number increase, the range of the displacement of soil extends towards the bottom of pile, until it covers the entire lower part of the model.

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Section: Introductionmentioning

confidence: 99%

Bearing and deformation characteristics of monopile foundation under monotonic and cyclic horizontal loads

Ma,

Xu,

Fan

et al. 2024

Science Progress

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“…The investigation into the variable section pile mainly focuses on its bearing mechanism. Li et al [12,13] revealed the migration patterns of sand particles around the piles with footing and bucket. They considered that the footing and bucket could improve the efficiency of soil stress mobilization at shallow depth, and that pile-footing foundation and pile-bucket foundation provide better performance in lateral response.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Branch Spacing and Number on the Uplift Bearing Capacity of a New Squeezed Multiple-Branch Pile: A Numerical Simulation Analysis

Xia

et al. 2023

Modelling and Simulation in Engineering

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The squeezed multiple-branch pile is a variable section pile that was built by adding a bearing branch cavity to a constant section pile using expansion and extrusion equipment. It is widely used in engineering practice for its high bearing capacity, small settlement deformation, high economic benefits, strong adaptability, and simple pile forming process. In this paper, a new type of squeezed multiple-branch pile is proposed and its forming tool is invented. The forming tool of the pile has applied for an invention patent and is authorized by the China National Intellectual Property Administration. Multiple groups of comparison models of the new squeezed multiple-branch piles are established by using FLAC3D numerical simulation software to investigate the influence of the number and spacing of branches on the bearing mechanism in response to uplift load. The results indicated that the number and spacing of branches have a significant effect on the uplift bearing capacity, load–displacement curves, side friction resistance, and stress distribution law in the new pile and soil around the pile. The suitable number and spacing of branches maximize the uplift bearing capacity and minimize the settlement of a single pile.

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“…Piles are widely used for the foundation of various structures, owing to their excellent performance in resisting static as well as dynamic loads. [1][2][3][4][5][6][7][8] Legacy methods for the seismic analysis of pile-supported structures were based on the assumption that piles conform to the free-field soil motion. Numerous studies [9][10][11][12] have demonstrated that this assumption may lead to poor estimates of pile response, as pile vibration alters free-field soil displacements in the vicinity of piles.…”

Section: Introductionmentioning

confidence: 99%

“…Piles are widely used for the foundation of various structures, owing to their excellent performance in resisting static as well as dynamic loads 1–8 . Legacy methods for the seismic analysis of pile‐supported structures were based on the assumption that piles conform to the free‐field soil motion.…”

Section: Introductionmentioning

confidence: 99%

Transverse seismic response of end‐bearing pipe piles to S‐waves

Zheng

Luo

Kouretzis

et al. 2022

Num Anal Meth Geomechanics

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This paper presents a method for the seismic analysis of open-ended pipe piles subjected to vertically propagating S-waves, that considers kinematic interaction between the pipe pile and its external and internal soil. Following the presentation of the elastodynamic continuum model, which is based on the assumptions of linear elastic soil response and uniform soil conditions, we employ the derived solution to investigate the sensitivity of the seismic response of pipe piles to certain key problem parameters, such as pile slenderness or the relative stiffness of the pipe pile compared to its surrounding soil. We demonstrate that the bending stiffness of pipe piles is governing their seismic response, and that thin-walled pipe piles offer the best material usage versus seismic performance ratio. The presented solution offers a low-cost alternative to complex numerical simulations for preliminary seismic design purposes, such as the selection of optimal pipe pile section geometry.

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Investigation on the behavior of hybrid pile foundation and its surrounding soil during cyclic lateral loading

Cited by 47 publications

References 19 publications

Bearing and deformation characteristics of monopile foundation under monotonic and cyclic horizontal loads

Bearing and deformation characteristics of monopile foundation under monotonic and cyclic horizontal loads

The Effects of Branch Spacing and Number on the Uplift Bearing Capacity of a New Squeezed Multiple-Branch Pile: A Numerical Simulation Analysis

Transverse seismic response of end‐bearing pipe piles to S‐waves

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