Numerical study of the 3D failure envelope of a single pile in sand

Lei, Zheng; Kotronis, Panagiotis; Escoffier, Sandra

doi:10.1016/j.compgeo.2014.06.004

Cited by 44 publications

(26 citation statements)

References 41 publications

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“…The bending stiffness E p I p of the pile section is equal to 5.05×10 8 N·m 2 . According to the classification introduced by Poulos and Davis, the pile can thus be considered as flexible . The hypoplastic model proposed by von Wolffersdorff with the intergranular strain concept of Niemunis and Herle is adopted to describe the behavior of dense Fontainebleau sand NE34 under monotonic and cyclic loading conditions.…”

Section: Behavior Of a Single Batter Pile In Sandmentioning

confidence: 99%

“…The loading function Y ( t ), which controls the degree of nonlinearity of the system response, increases monotonically with the distance of the current stress state t to the assumed ultimate failure surface of the soil‐pile system:

F false(bold-italict false) = F false(V, H, M false/ D false) = 0

in the generalized loading space …”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

“…For the specific case of single vertical pile in sand (Fontainebleau sand NE34), Li et al proposed the following equation for the failure surface , shown in Figure :

F false(bold-italict false) = {((), \frac{H}{H_{0}})}^{2} + {((), \frac{D M}{D M_{0}})}^{2} - α ((), \frac{H}{H_{0}}) ((), \frac{D M}{D M_{0}}) - 1 + ({}, scriptH false(V false) {((), \frac{V_{t 0}}{V_{c 0}})}^{2} + scriptH false(- V false)) {((), \frac{V}{V_{t 0}})}^{2} = 0,

where the constants H 0 , M 0 , V c 0 , and V t 0 represent the failure loads under pure horizontal, bending, axial compression, and axial tension; α is a model constant controlling the orientation of the failure surface in the H : M / D plane, and

scriptH false(x false)

is the Heaviside step function, defined by

H (x) = \{\begin{matrix} 1 & if x > 0 \\ 0 & if x \leq 0 \end{matrix} .

…”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

“…Failure surface of a single vertical pile in sand, Equation , after Li et al [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

“…In Li et al, 58,61 the authors have successfully made a series of nonlinear FE simulations to investigate the behavior of a single vertical pile in dense sand (Fontainebleau sand NE34). The same modeling approach is adopted hereafter for a single batter pile in Fontainebleau NE34 sand.…”

Section: Three-dimensional Fe Model Of a Single Batter Pilementioning

confidence: 99%

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A hypoplastic macroelement formulation for single batter piles in sand

Kotronis

Escoffier³

et al. 2018

Num Anal Meth Geomechanics

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Summary Batter piles are widely used in geotechnical engineering when substantial lateral resistance is needed or to avoid the interference with existing underground constructions. Nevertheless, there is a lack of fast numerical tools for nonlinear soil‐structure interactions problems for this type of foundation. A novel hypoplastic macroelement is proposed, able to reproduce the nonlinear response of a single batter pile in sand under monotonic and cyclic static loadings. The behavior of batter piles (15°, 30°, and 45°) is first numerically investigated using 3D finite element modeling and compared with the behavior of vertical piles. It is shown that their response mainly depends on the pile inclination and the loading direction. Then, starting from the macroelement for single vertical piles in sand by Li et al (Acta Geotechnica, 11(2):373‐390, 2016), an extension is proposed to take into account the pile inclination introducing simple analytical equations in the expression describing the failure surface. 3D finite element numerical models are adopted to validate the macroelement that is proven able to reproduce the nonlinear behavior in terms of global quantities (forces‐displacements) and to significantly reduce the necessary computational time.

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Section: Behavior Of a Single Batter Pile In Sandmentioning

confidence: 99%

F false(bold-italict false) = F false(V, H, M false/ D false) = 0

in the generalized loading space …”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

“…For the specific case of single vertical pile in sand (Fontainebleau sand NE34), Li et al proposed the following equation for the failure surface , shown in Figure :

F false(bold-italict false) = {((), \frac{H}{H_{0}})}^{2} + {((), \frac{D M}{D M_{0}})}^{2} - α ((), \frac{H}{H_{0}}) ((), \frac{D M}{D M_{0}}) - 1 + ({}, scriptH false(V false) {((), \frac{V_{t 0}}{V_{c 0}})}^{2} + scriptH false(- V false)) {((), \frac{V}{V_{t 0}})}^{2} = 0,

scriptH false(x false)

is the Heaviside step function, defined by

H (x) = \{\begin{matrix} 1 & if x > 0 \\ 0 & if x \leq 0 \end{matrix} .

…”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

“…Failure surface of a single vertical pile in sand, Equation , after Li et al [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Hypoplastic Macroelement For Batter Pilesmentioning

confidence: 99%

Section: Three-dimensional Fe Model Of a Single Batter Pilementioning

confidence: 99%

See 3 more Smart Citations

A hypoplastic macroelement formulation for single batter piles in sand

Kotronis

Escoffier³

et al. 2018

Num Anal Meth Geomechanics

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show abstract

Macroelements for Soil–Structure Interaction

Salciarini¹,

Grange²,

Tamagnini³

et al. 2021

Deterministic Numerical Modeling of Soil–Structure Interaction

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Centrifuge modeling of batter pile foundations under sinusoidal dynamic excitation

Escoffier²,

Kotronis

2015

Bull Earthquake Eng

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International audienceBatter pile (or inclined pile) foundations are widely used in civil engineering structures. However, their behavior under dynamic loadings is not yet thoroughly understood. This paper presents an experimental work on the behavior of batter and vertical piles considering dynamic soil-pile-superstructure interactions. A series of dynamic centrifuge tests were performed using sinusoidal excitations. The influence of the base shaking (frequency content and amplitude) and of the height of the center of gravity of the superstructure is investigated. Seismic responses are analyzed considering the pile cap displacements and forces (total base shear, overturning and residual moments, axial forces). It is found that in certain cases batter piles play a beneficial role on the dynamic behavior of the pile foundation system. This novel experimental work provides an important database on the behavior of batter pile foundations under dynamic loadings

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Numerical study of the 3D failure envelope of a single pile in sand

Abstract: International audienc

Cited by 44 publications

References 41 publications

A hypoplastic macroelement formulation for single batter piles in sand

A hypoplastic macroelement formulation for single batter piles in sand

Macroelements for Soil–Structure Interaction

Centrifuge modeling of batter pile foundations under sinusoidal dynamic excitation

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