Numerical analysis of the response of battered piles to inclined pullout loads

Mroueh, Hussein; Shahrour, Isam

doi:10.1002/nag.765

Cited by 39 publications

(16 citation statements)

References 18 publications

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“…It can be seen that the pull‐out capacity is decreasing with increasing pile inclination. This is in accordance with experimental and numerical results found in the literature …”

Section: Behavior Of a Single Batter Pile In Sandsupporting

confidence: 93%

“…This is in accordance with experimental and numerical results found in the literature. 5,10,11,15,18 Hanna and Afram 10 proposed the following relation for the axial pull-out capacity V t0 of batter piles, as a function of the pull-out capacity of an identical vertical pile V t0 and of pile inclination (in radians):…”

Section: Pull-out and Bearing Capacitiesmentioning

confidence: 99%

“…Mroueh and Shahrour studied numerically the pull‐out capacity of batter piles and Padrón et al the kinematic internal forces using a coupled boundary element–finite element (FE) method. Numerical studies on the dynamic/seismic behavior of batter piles are also reported in previous studies .…”

Section: Introductionmentioning

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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“…It can be seen that the pull‐out capacity is decreasing with increasing pile inclination. This is in accordance with experimental and numerical results found in the literature …”

Section: Behavior Of a Single Batter Pile In Sandsupporting

confidence: 93%

Section: Pull-out and Bearing Capacitiesmentioning

confidence: 99%

See 1 more Smart Citation

A hypoplastic macroelement formulation for single batter piles in sand

Kotronis

Escoffier³

et al. 2018

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

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“…This happened possibly due to a large contact surface area of the square-shaped pile compared with the circular pile. This assumption is supported by [15].…”

Section: Influence Of Pile Shapementioning

confidence: 76%

“…One of the main advantages of the 3D finite element simulation is the personification of the shape effect. The previous investigations show that the response of pile to lateral load is moderately affected by the shape of cross section [15]. Therefore, this study includes mainly the effect of pile shape on the lateral pile response on both cohesionless and cohesive soils.…”

Section: Influence Of Pile Shapementioning

confidence: 99%

Modelling and Assessment of a Single Pile Subjected to Lateral Load

Abbas

Chik

Taha

2018

Studia Geotechnica Et Mechanica

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A three-dimensional finite element technique was used to analyse single pile lateral response subjected to pure lateral load. The main objective of this study is to assess the influence of the pile slenderness ratio on the lateral behaviour of single pile. The lateral single pile response in this assessment considered both lateral pile displacement and lateral soil resistance. As a result, modified p-y curves for lateral single pile response were improved when taking into account the influence lateral load magnitudes, pile cross sectional shape and flexural rigidity of the pile. The finite element method includes linear elastic, Mohr-Coulomb and 16-nodes interface models to represent the pile behaviour, soil performance and interface element, respectively. It can be concluded that the lateral pile deformation and lateral soil resistance because of the lateral load are always influenced by lateral load intensity and soil type as well as a pile slenderness ratio (L/D). The pile under an intermediate and large amount of loading (in case of cohesionless soil) has more resistance (low lateral displacement) than the pile embedded on the cohesion soil. In addition, it can be observed that the square-shaped pile is able to resist the load by about 30% more than the circular pile. On the other hand, pile in cohesionless soil was less affected by the change in EI compared with that in cohesive soil.

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A coupling method for soil structure interaction problems

Souli¹,

Shahrour

2012

Num Anal Meth Geomechanics

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International audienceThis paper describes a soil-structure coupling method to simulate blast loading in soil and structure response. For the last decade, simulation of soil behavior under blast loading and its interaction with semi buried structure in soil becomes the focus of computational engineering in civil and mechanical engineering communities. In current design practice, soil-structure interaction analysis often assumes linear elastic properties of the soil and uses small displacement theory. However, there are numerous problems, which require a more advanced approach that account for soil-structure interaction and appropriate constitutive models for soil. In simplified approaches, the effect of soil on structure is considered using spring-dashpot-mass system, and the blast loading is modeled using linearly decaying pressure-time history based on equivalent trinitrotoluene and standoff distance, using ConWep, a computer program based on semi-empirical equations. This strategy is very efficient from a CPU time computing point of view but may not provide accurate results for the dynamic response of the structure, because of its significant limitations, mainly when soil behavior is strongly nonlinear and when the buried charge is close to the structure. In this paper, both soil and explosive are modeled using solid elements with a constitutive material law for soil, and a Jones-Wilkins-Lee equation of state for explosive. One of the problems we have encountered when solving fluid structure interaction problems is the high mesh distortion at the contact interface because of high fluid nodal displacements and velocities. Similar problems have been encountered in soil structure interaction problems. To prevent high mesh distortion for soil, a new coupling algorithm is performed at the soil structure interface for structure loading. The coupling method is commonly used for fluid structure interaction problems in automotive and aerospace industry for fuel sloshing tank, and bird impact problems, but rarely used for soil structure interaction problems, where Lagrangian contact type algorithms are still dominant. Copyright © 2012 John Wiley & Sons, Ltd

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Numerical analysis of the response of battered piles to inclined pullout loads

Abstract: SUMMARYThis paper presents a three-dimensional finite element analysis of the response of battered piles to the combined lateral and vertical pullout loads. Analyses are carried out using an elastoplastic constitutive law based on the non-associated Mohr-Coulomb criterion.

Cited by 39 publications

References 18 publications

A hypoplastic macroelement formulation for single batter piles in sand

A hypoplastic macroelement formulation for single batter piles in sand

Modelling and Assessment of a Single Pile Subjected to Lateral Load

A coupling method for soil structure interaction problems

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