Seismic analysis of laterally loaded pile under influence of vertical loading using finite element method

Chatterjee, Kaustav; Choudhury, Deepankar; Poulos, Harry G.

doi:10.1016/j.compgeo.2015.03.004

Cited by 61 publications

(10 citation statements)

References 34 publications

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“…Bhattacharya et al proposed a simplified method based on a unified dynamic and buckling approach to characterize the free vibration analysis of pile supported structures in liquefiable soil, whereas Bhattacharya and Goda used probabilistic approach for buckling analysis of axially loaded piles under seismic conditions. Chatterjee et al performed pseudostatic analysis of single piles subjected to vertical and lateral loads using an analytical procedure based on finite element technique. These experimental and analytical methods enabled the formulation of various empirical correlations for computing permanent ground displacement and determination of lateral pressure exerted by the spreading soil due to liquefaction.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum ground surface acceleration at various depths of the soil deposit, due to different earthquake motions, is multiplied by the allowable pile capacity along with the lateral load coefficient ( α ) to obtain the equivalent lateral loads ( H ) acting along the pile depth, as performed by Chatterjee et al The lateral load coefficient ( α ) may be defined as the percentage of vertical load acting at various depths along the pile length. In the present study, the lateral load coefficient is considered to remain constant along the depth of the pile for a particular problem, and parametric variation is performed by varying α as 25%, 50%, 75%, and 100% for various cases, as discussed later in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Influence of seismic motions on behavior of piles in liquefied soils

Chatterjee

Choudhury

2017

Num Anal Meth Geomechanics

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Summary In the present study an analytical procedure based on finite element technique is proposed to investigate the influence of vertical load on deflection and bending moment of a laterally loaded pile embedded in liquefiable soil, subjected to permanent ground displacement. The degradation of subgrade modulus due to soil liquefaction and effect of nonlinearity are also considered. A free headed vertical concrete elastic nonyielding pile with a floating tip subjected to vertical compressive loading, lateral load, and permanent ground displacement due to earthquake motions, in liquefiable soil underlain by nonliquefiable stratum, is considered. The input seismic motions, having varying range of ground motion parameters, considered here include 1989 Loma Gilroy, 1995 Kobe, 2001 Bhuj, and 2011 Sikkim motions. It is calculated that maximum bending moment occurred at the interface of liquefiable and nonliquefiable soil layers and when thickness of liquefiable soil layer is around 60% of total pile length. Maximum bending moment of 1210 kNm and pile head deflection of 110 cm is observed because of 1995 Kobe motion, while 2001 Bhuj and 2011 Sikkim motions amplify the pile head deflection by 14.2 and 14.4 times and bending moment approximately by 4 times, when compared to nonliquefiable soil. Further, the presence of inertial load at the pile head increases bending moment and deflection by approximately 52% when subjected to 1995 Kobe motion. Thus, it is necessary to have a proper assessment of both kinematic and inertial interactions due to free field seismic motions and vertical loads for evaluating pile response in liquefiable soil.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of seismic motions on behavior of piles in liquefied soils

Chatterjee

Choudhury

2017

Num Anal Meth Geomechanics

Self Cite

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“…However, when the pile tip is supported on the rock, the pile tip resistance should be considered, and the bearing capacity of the pile is mainly controlled by the material strength of the pile mass [42][43][44][45][46]. Australian engineers have proposed a semi-empirical and semi-theoretical root pile design theory.…”

Section: Vertical Load Bearingmentioning

confidence: 99%

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

Ding¹,

Su²,

Lai³

et al. 2017

CEJ

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Over the past couple of decades, root piles as the new tool for addressing a number of tough problems have been gaining a continually increasing interest in tunnel, especially for complex geological conditions. Therefore, in order to promote the development and application of root piles in tunnel engineering, this paper systematically sorts out the research status and development prospect of root piles from the application in foundation underpinning to reinforcement of tunnel foundation. Firstly, the type and development process of root piles are discussed. Secondly, the reinforcement mechanism of the root piles in the tunnel base is refined and combed: the reinforcement mechanism analysis focuses on frictional resistance of soil around pile, soil among piles, and piles. Thirdly, the calculation method of reinforced tunnel foundation is studied from the bearing of vertical load, horizontal load and pile reinforcement design. And through the engineering case, the paper illustrates the reinforcement effect of the root pile in ensuring the stability of the tunnel and the concrete process of the root piles in the tunnel construction. Finally, the problem and development prospect of root piles are discussed, so as to provide new perspectives and fundamental data for the research on tunnel engineering.

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“…Yi et al [20] studied wind turbine offshore models supported by mono-pile, and found that the natural frequency was more significantly affected by the equivalent load amplitude, and the jacket-supported offshore wind turbine is more robust in terms of the consistency of the natural frequency under different equivalent load amplitudes and uncertain soil conditions, at water depths between 20 and 30 m. Durante et al [21] concluded that the complex seismic pile-soil interaction phenomenon can be efficiently investigated by testing models on a shaking table. Chatterjee et al [22] studied the seismic analysis of a laterally loaded pile applying a pseudo-static methodology and concluded that if the soil is saturated, the bending moment at the pile top is amplified by around 4 and 7.8 times (for two specific seismic motions respectively), and that with a reduction in the l/d ratio of the pile, the normalized moment at the pile head is increased while the normalized displacement is reduced. Ukritchon et al [23] concluded that in a pile group, the maximum effect happens at the corner piles and it decreases as the location of the pile gets closer to the center but increases again below the applied vertical load.…”

Section: Introductionmentioning

confidence: 99%

3D FEM Analysis of a Pile-Supported Riverine Platform under Environmental Loads Incorporating Soil-Pile Interaction

Kontoni

Farghaly

2018

Computation

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An existing riverine platform in Egypt, together with its pile group foundation, is analyzed under environmental loads using 3D FEM structural analysis software incorporating soil-pile interaction. The interaction between the transfer plate and the piles supporting the platform is investigated. Two connection conditions were studied assuming fixed or hinged connection between the piles and the reinforced concrete platform for the purpose of comparison of the structural behavior. The analysis showed that the fixed or hinged connection condition between the piles and the platform altered the values and distribution of displacements, normal force, bending moments, and shear forces along the length of each pile. The distribution of piles in the pile group affects the stress distribution on both the soil and platform. The piles were found to suffer from displacement failure rather than force failure. Moreover, the resulting bending stresses on the reinforced concrete plate in the case of a fixed connection between the piles and the platform were almost doubled and much higher than the allowable reinforced concrete stress and even exceeded the ultimate design strength and thus the environmental loads acting on a pile-supported riverine offshore platform may cause collapse if they are not properly considered in the structural analysis and design.

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Seismic analysis of laterally loaded pile under influence of vertical loading using finite element method

Cited by 61 publications

References 34 publications

Influence of seismic motions on behavior of piles in liquefied soils

Influence of seismic motions on behavior of piles in liquefied soils

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

3D FEM Analysis of a Pile-Supported Riverine Platform under Environmental Loads Incorporating Soil-Pile Interaction

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