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Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 6,   Pages 915-934 doi: 10.1007/s11709-023-0907-8

Abstract: A fictitious soil pile (FSP) model is developed to simulate the behavior of pipe piles with soil plugsThe developed model simulates the base soil with a fictitious hollow pile fully filled with a soil plugextending at a cone angle from the pile toe to the bedrock., and the propagation of stress waves in the base soil and soil plug is considered.The motions of the pile−soil system are solved by discretizing them into spring-mass model based on the

Keywords： fictitious soil pile     soil plug     pipe piles     high-strain dynamic analysis     one-dimensional wave theory     pile dynamics    

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Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Nishant SHARMA, Kaustubh DASGUPTA, Arindam DEY

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 62-81 doi: 10.1007/s11709-019-0570-2

Abstract: This article describes a novel approach for deciding optimal horizontal extent of soil domain to be usedfor finite element based numerical dynamic soil structure interaction (SSI) studies.SSI model for a 12 storied building frame, supported on pile foundation-soil system, is developed inLateral extent of soil domain, along with the soil properties, were varied exhaustively for a particulardomain is prescribed for various structural widths, soil types and peak ground acceleration levels of

Keywords： soil structure interaction     optimum lateral extent of soil domain length     multi-storyed framed building     pile foundation     OpenSEES     L-K boundaries     dynamic analysis    

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A simplified method for the determination of vertically loaded pile-soil interface parameters in layeredsoil based on FLAC

Jiu-jiang WU,Yan LI,Qian-gong CHENG,Hua WEN,Xin LIANG

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 103-111 doi: 10.1007/s11709-015-0328-4

Abstract: The numerical analysis of pile-soil interaction commonly requires a lot of trial works to determine thesensitivity analysis to figure out the influence of interface parameters on the bearing behavior of a single pileThen, a simplified method for the determination of pile-soil interface parameters in layered soil is

Keywords： determination of interface parameters     pile-soil interaction     FLAC3D     sensitivity analysis     layeredsoil    

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Finite element prediction on the response of non-uniformly arranged pile groups considering progressivefailure of pile-soil system

Qian-Qing ZHANG, Shan-Wei LIU, Ruo-Feng FENG, Jian-Gu QIAN, Chun-Yu CUI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 961-982 doi: 10.1007/s11709-020-0632-5

Abstract: A uniform arrangement of individual piles is commonly adopted in the conventional pile group foundationLarge differential settlement of pile groups will decrease the use-safety requirements of building, evenThis paper presents a finite element analysis on the response of pile groups with different layouts ofindividual piles in pile groups.Furthermore, the response of non-uniformly arranged pile groups, e.g., individual piles with variable

Keywords： numerical simulation     non-uniformly arranged pile groups     differential settlement     pile-soil interaction    

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Development of design charts to predict the dynamic response of pile supported machine foundations

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 4,   Pages 663-679 doi: 10.1007/s11709-024-1024-z

Abstract: 2 × 2 grouped piles under coupled and vertical modes of vibration, for different dynamic forces and pileAs these design charts are derived from model piles, the charts have been validated for prototype pileextends to estimation of the errors in computing frequency–amplitude responses with an increase in pileIt is found that, with an increase in pile length, the errors also increase.estimating the input parameters for continuum approach analysis for determining the nonlinear responses of pile

Keywords： pile foundation     vertical vibration     coupled vibration     continuum approach     soil–pile separation     boundary    

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Shaking table testing of hard layered soil-pile-structure interaction system

LI Peizhen, REN Hongmei, LU Xilin, SONG Heping, CHEN Yueqing

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 346-352 doi: 10.1007/s11709-007-0046-7

Abstract: Shaking table tests on a dynamic interaction system of hard layered soil, pile foundation and frame structureBased on these tests, several key issues about the seismic response of the dynamic soil-structure interactionMagnification or reduction of vibration transferred by soil was related to soil characteristic, excitationGenerally, sand magnifies vibration, while viscous powder soil dampens vibration.

Keywords： super-structure     Generally     Magnification     frequency     different    

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Time-dependent deviation of bridge pile foundations caused by adjacent large-area surcharge loads in

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 2,   Pages 184-201 doi: 10.1007/s11709-024-1047-5

Abstract: TDCs) have been neglected in most previous studies investigating the deviation mechanisms of bridge pileBased on the validated FE model, the time-dependent deformation mechanism of the pile foundation wasThe additional load acting on the pile side caused by soil lateral deformation was mainly concentratedwithin the soft soil layer and increased with the increase in load duration.i>t = 3 d (where t is surcharge time), the maximum lateral additional pressure acting on Pile

Keywords： bridge pile foundation     surcharge load     soft soil     time-dependent deformation     interaction mechanism    

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Numerical analysis on seismic response and failure mechanism of articulated pile−structure system in

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-024-0958-5

Abstract: site by employing a numerical simulation model combined with the shaking-table results of a soil−pileThe pile and soil responses obtained from the numerical simulations agreed well with the experimentalat different positions also exhibited a decreasing trend, indicating that the shear strength of the soilThe peak acceleration of the soil and pile was not clearly amplified in the saturated sand layer butis caused by an excessive bending moment in the middle of the pile shaft if the link between the pile

Keywords： numerical simulation     soil liquefaction     pile foundation     shaking-table experiment     seismic responses    

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Numerical evaluation of group-pile foundation subjected to cyclic horizontal load

Youngji JIN, Xiaohua BAO, Yoshimitsu KONDO, Feng ZHANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 196-207 doi: 10.1007/s11709-010-0021-6

Abstract: In this paper, three-dimensional (3D) finite element analyses of a real-scale group-pile foundation subjectedIn order to consider the influence of an effective stress path on the prediction of the group-pile foundation, the analyses are conducted within the framework of the soil-water coupling method with finite-differenceis quite confident to say that the method can be used to predict the mechanical behaviors of group-pile

Keywords： group-pile foundation     real-scale cyclic loading test     three-dimensional finite element method (3D-FEM)     soil-water coupling analysis     undisturbed and remolded specimens    

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Model test study on surrounding soil stress distribution of DX pile

Tang Songtao,Chen Lihong,Yuan Xiyu

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 105-112

Abstract: of DX piles, so that the load transfer law in the soil can be researched.the straight pile with the same parameters.However, when the bell locates on the lower part of pile shaft, the stress of soil around the pile tipFor two-bell DX pile, the stresses around the two bells are similar, and the range of soil stress inducedFor the DX pile with three bells, the soil stress around the bells spread increasingly, while the amplitude

Keywords： DX pile     earth pressure cell     stress measurement    

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A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 7,   Pages 1021-1032 doi: 10.1007/s11709-023-0952-3

Abstract: Here, we propose an efficient two-stage method that combines a test-verified soil deformation mechanismand Poulos’ solution for pile–soil interaction to investigate the bending behavior of piles supportingbetween the soft and firm ground layers, at mid-depths of the fan zone, and at the boundary of the soilThe location of the bending failure depends on the position and relative stiffness of the given pile.When the embedded length of a pile exceeded a critical value, the bending moment at the interface between

Keywords： bending behavior     pile     embankment     soil−structure interaction     failure mode    

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Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 22-29 doi: 10.1007/s11709-016-0314-5

Abstract: Large open-ended pipe pile has been found to be advantageous for use in transportation projects.A major factor for all the design codes is to properly account for the formation and effects of soilTo close the knowledge gap, discrete element method (DEM) was used to simulate the soil plugging processBesides, nearly 90% of the plug resistance is provided by the bottom half portion of the soil column.The soil-pile friction coefficient has a significant effect on the magnitude of plug resistance, with

Keywords： open-ended pipe pile     soil plug     DEM     base capacity    

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Calculation of Cohesive Stress Along the Fictitious Crack Zone in Concrete Materials

Xu Shilang,Wang Limin

Strategic Study of CAE 2002, Volume 4, Issue 5,   Pages 53-58

Abstract:

Nonlinear fracture behaviors of concrete materials are mainly caused by the cohesive stress along the fracture process zone. Based upon concrete fracture properties and the analytical model of crack with cohesive forces, two simple formulae concisely expressing the cohesive stress distribution are presented through analyzing characteristics of the cohesive force distribution function. One formula has only one undefined parameter. The other one has two undefined parameters. According to the superposition principle of deformation body, a formula for calculating the sole undefined parameter to control the cohesive force distribution function is deduced. Similarly, two algebra equations for solving the two undefined parameters also for controlling the cohesive force distribution are given. As a result, using the test data of crack opening displacement, the cohesive stress distribution is determined. The relevant calculation examples and discussions are given, too, in this paper.

Keywords： concrete     crack opening displacement     fictitious crack cohesive force     algebra equations    

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Study on load bearing characteristic of cast in situ DX group pile with numerical analysis

Zhang Qinglin,Chen Lihong

Strategic Study of CAE 2012, Volume 14, Issue 1,   Pages 51-59

Abstract:

This paper analyzes 4 types of group-pile which contains 4 piles withThe main conclusions are: group pile effect of DX pile increases sharply when pile spacing decreases；the bearing capacity of 3D spacing group-pile is 1.32 times larger than that of 1.5D spacing group-pilethe maximum value of settlement of soil among group-pile occurs between two bearing plates, and it decreaseswhen the spacing of pile increases.

Keywords： DX pile     group-pile     settlement     numerical analysis    

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Prediction of bearing capacity of pile foundation using deep learning approaches

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 6,   Pages 870-886 doi: 10.1007/s11709-024-1085-z

Abstract: accurate prediction of bearing capacity is crucial in ensuring the structural integrity and safety of pileShort-Term Memory (LSTM), and Bidirectional LSTM (BiLSTM) algorithms utilizing a data set of 257 dynamic pileThe prediction of pile-bearing capacity is strongly influenced by ram weight (having a considerable multicollinearitystudy, the recurrent neural network model has the least performance and accuracy in predicting the pile-bearing

Keywords： deep learning algorithms     high-strain dynamic pile test     bearing capacity of the pile    

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Title Author Date Type Operation

Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions

Journal Article

Optimum lateral extent of soil domain for dynamic SSI analysis of RC framed buildings on pile foundations

Nishant SHARMA, Kaustubh DASGUPTA, Arindam DEY

Journal Article

A simplified method for the determination of vertically loaded pile-soil interface parameters in layeredsoil based on FLAC

Jiu-jiang WU,Yan LI,Qian-gong CHENG,Hua WEN,Xin LIANG

Journal Article

Finite element prediction on the response of non-uniformly arranged pile groups considering progressivefailure of pile-soil system

Qian-Qing ZHANG, Shan-Wei LIU, Ruo-Feng FENG, Jian-Gu QIAN, Chun-Yu CUI

Journal Article

Development of design charts to predict the dynamic response of pile supported machine foundations

Journal Article

Shaking table testing of hard layered soil-pile-structure interaction system

LI Peizhen, REN Hongmei, LU Xilin, SONG Heping, CHEN Yueqing

Journal Article

Time-dependent deviation of bridge pile foundations caused by adjacent large-area surcharge loads in

Journal Article

Numerical analysis on seismic response and failure mechanism of articulated pile−structure system in

Journal Article

Numerical evaluation of group-pile foundation subjected to cyclic horizontal load

Youngji JIN, Xiaohua BAO, Yoshimitsu KONDO, Feng ZHANG,

Journal Article

Model test study on surrounding soil stress distribution of DX pile

Tang Songtao,Chen Lihong,Yuan Xiyu

Journal Article

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Journal Article

Design and analyses of open-ended pipe piles in cohesionless soils

Yuan GUO,Xiong (Bill) YU

Journal Article

Calculation of Cohesive Stress Along the Fictitious Crack Zone in Concrete Materials

Xu Shilang,Wang Limin

Journal Article

Study on load bearing characteristic of cast in situ DX group pile with numerical analysis

Zhang Qinglin,Chen Lihong

Journal Article

Prediction of bearing capacity of pile foundation using deep learning approaches

Journal Article