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Durham e-Theses
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Analytical methods for predicting load-displacement behaviour of piles

HASHEM-ALI, SALMA,FIDEL (2014) Analytical methods for predicting load-displacement behaviour of piles. Doctoral thesis, Durham University.

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PDF (Thesis) - Accepted Version
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[img]Other (code for calculating dynamic response of laterally loaded pile) - Accepted Version
Available under License Creative Commons Attribution 3.0 (CC BY).

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[img]Other (code for calculating static response of laterally loaded pile) - Accepted Version
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[img]Other (code for calculating lateral displacement of pile in nonlinear soil) - Accepted Version
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Abstract

Abstract
This thesis presents new methods for predicting pile response under different loading and soil conditions. The new methods offer practs engineers with a simple, quick and reliable tool for designing piles and ensuring that both safety and serviceability requirements are satisfied.
In this thesis, an energy-based analytical approach for determining the dynamic response of piles subjected to dynamic loads is presented. The kinematic and potential energies of the pile-foundation system are minimized by a variational principle to obtain the governing equations of the pile-foundation system, along with the appropriate boundary conditions. Comparison with field data demonstrates the success of the new approach for predicting the resonant frequencies of laterally loaded piles.
Energy-based methods are also developed for piles subjected to combined static loading. These methods are formulated for different constitutive models: linear-elastic, non-linear elastic and elasto-plastic models. In addition to energy-based methods, simple similarity methods have been developed to predict pile displacements. In the similarity methods, the load-displacement curve of a pile foundation can be obtained directly by scaling the stress-strain response obtained from a triaxial test on a representative soil sample. Linear scaling factors are presented and extensive verification is carried out against field data, centrifuge models and nonlinear finite element analysis.

Item Type:Thesis (Doctoral)
Award:Doctor of Philosophy
Keywords:Laterally loaded pile, linear elastic soil, axial loaded pile, nonlinear elastic soil, elasto plastic soil, similarity method, energy method.
Faculty and Department:Faculty of Science > Engineering and Computing Science, School of
Thesis Date:2014
Copyright:Copyright of this thesis is held by the author
Deposited On:12 Dec 2014 14:45

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