Lateral Static Response of Piles Based on a Full-Fledged Two-Parameter Foundation Model
Publication: International Journal of Geomechanics
Volume 23, Issue 2
Abstract
A rigorous analytical continuum subgrade model translated into an equivalent two-parameter mechanical model of the Pasternak type is used to study the static response of piles to lateral loads. The model fully accounts for the soil shear missing in the conventional Winkler representation. The two parameters of the model are derived in advance. After conducting static analyses of a wide range of cases of the pile–soil system using both the proposed analytical model and finite-element models, closed-form relations are obtained for the adjustment factor left open in the model parameters that are found to mainly depend on the soil’s Poisson’s ratio. Back substitution of this factor showed that the model parameters take simple forms that depend only on a few factors such as the pile–soil stiffness ratio and the pile-end conditions. The model is validated by means of results of finite-element models. Closed-form pile head stiffness coefficients for various pile-end conditions are provided for both infinite- and finite-length piles. Expressions for a newly defined pile critical length are proposed for several combinations of pile-end conditions. It is demonstrated that the analytical approach employed is convenient and avoids the high degree of empiricity inherent in the conventional Winkler-based backward approach. The model has also the unique advantage of being convenient to conduct parametric studies, including the influence of soil shear resistance.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 23 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Oct 22, 2021
Accepted: Aug 8, 2022
Published online: Nov 22, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 22, 2023
ASCE Technical Topics:
- Closed form solutions
- Continuum mechanics
- Design (by type)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Foundations
- Geotechnical engineering
- Lateral loads
- Load factors
- Mathematics
- Methodology (by type)
- Numerical methods
- Parameters (statistics)
- Pile foundations
- Piles
- Solid mechanics
- Statistics
- Stiffening
- Structural behavior
- Structural design
- Structural dynamics
- Structural engineering
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Cited by
- Asrat Worku, Abey Lulseged, Kinematic pile-soil interaction using a rigorous two-parameter foundation model, Soil Dynamics and Earthquake Engineering, 10.1016/j.soildyn.2022.107701, 165, (107701), (2023).