"Offshore tower or platform foundations: numerical analysis of a laterally loaded single pile or pile group in soft clay and analysis of actions on a jacket structure"

Tedesco, Giacomo (2014) "Offshore tower or platform foundations: numerical analysis of a laterally loaded single pile or pile group in soft clay and analysis of actions on a jacket structure". [Laurea magistrale], Università di Bologna, Corso di Studio in Ingegneria civile [LM-DM270]
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Abstract

Laterally loaded piles are a typical situation for a large number of cases in which deep foundations are used. Dissertation herein reported, is a focus upon the numerical simulation of laterally loaded piles. In the first chapter the best model settings are largely discussed, so a clear idea about the effects of interface adoption, model dimension, refinement cluster and mesh coarseness is reached. At a second stage, there are three distinct parametric analyses, in which the model response sensibility is studied for variation of interface reduction factor, Eps50 and tensile cut-off. In addition, the adoption of an advanced soil model is analysed (NGI-ADP). This was done in order to use the complex behaviour (different undrained shear strengths are involved) that governs the resisting process of clay under short time static loads. Once set a definitive model, a series of analyses has been carried out with the objective of defining the resistance-deflection (P-y) curves for Plaxis3D (2013) data. Major results of a large number of comparisons made with curves from API (America Petroleum Institute) recommendation are that the empirical curves have almost the same ultimate resistance but a bigger initial stiffness. In the second part of the thesis a simplified structural preliminary design of a jacket structure has been carried out to evaluate the environmental forces that act on it and on its piles foundation. Finally, pile lateral response is studied using the empirical curves.

Abstract
Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Tedesco, Giacomo
Relatore della tesi
Scuola
Corso di studio
Indirizzo
Curriculum: Ingegneria geotecnica
Ordinamento Cds
DM270
Parole chiave
P-y curves, offshore foundation, pile foundation, jacket structures, Plaxis3D 2013
Data di discussione della Tesi
17 Marzo 2014
URI

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