Analysis of laterally loaded pile groups in multilayered elastic soil

The paper presents a semi-analytical method of calculating the response of a pile group. The approach is based on tying the displacement at any point of the soil mass around a pile or group of piles to the displacements experienced by the piles themselves. This is done by multiplying the pile displa...

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Bibliographic Details
Published in:Computers and geotechnics 2014-10, Vol.62, p.136-153
Main Authors: Salgado, R., Tehrani, F.S., Prezzi, M.
Format: Article
Language:English
Subjects:
Decay
Differential equations
Displacement
Elastic analyses
Laterally loaded piles
Mathematical analysis
Mathematical models
Pile foundations
Pile groups
Piles
Potential energy
Soil (material)
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Summary:The paper presents a semi-analytical method of calculating the response of a pile group. The approach is based on tying the displacement at any point of the soil mass around a pile or group of piles to the displacements experienced by the piles themselves. This is done by multiplying the pile displacements by decay functions. Application of the principle of minimum potential energy and calculus of variations to the resulting displacement field formulation leads to the differential equations for the soil and piles. Solution of these differential equations using finite differences and the method of eigenvectors leads to the desired displacement field in the soil and deflection profiles of the piles. The method produces displacement fields that are very close to those produced by the finite element method at a fraction of the cost. To illustrate the ease of application of the method, it is then used to prepare pile group efficiency charts for some typical soil modulus profiles.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2014.07.005