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Inverse analysis on in situ geotechnical measurement using a genetic algorithm
Malécot, Yann; Levasseur, Séverine; Boulon, Marc et al.
2004In Pande, G. N.; Pietruszczak, S. (Eds.) Numerical Models in Geomechanics
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Abstract :
[en] This paper is dedicated to the identification of constitutive parameters of the Mohr-Coulomb constitutive model from in situ measurements. A general definition of an objective function is proposed. A direct approach of inverse analysis is used to identify the shear modulus and the friction angle in four different situations. The first two examples deal with a “numerical” and with a real pressuremeter curve. A difficult convergence and a strong non unicity of solution is observed, which is classical in inverse analysis (ill posed problems). In a second stage, the horizontal displacements related to two excavation problems are used for identifying the two mechanical parameters. A clear minimum of the objective function is detected, giving a unique solution. The reasons of these differences are discussed and some ways of improving the interpretation of the pressuremeter test results are proposed.
Disciplines :
Civil engineering
Author, co-author :
Malécot, Yann;  Université Joseph Fourier - Grenoble 1 - UJF > Laboratoire 3S
Levasseur, Séverine ;  Université Joseph Fourier - Grenoble 1 - UJF > Laboratoire 3S
Boulon, Marc;  Université Joseph Fourier - Grenoble 1 - UJF > Laboratoire 3S
Flavigny, Etienne;  Université Joseph Fourier - Grenoble 1 - UJF > Laboratoire 3S
Language :
English
Title :
Inverse analysis on in situ geotechnical measurement using a genetic algorithm
Publication date :
2004
Event name :
NUMOG IX
Event organizer :
G.N. Pande & S. Pietruszczak
Event place :
Ottawa, Canada
Event date :
25 au 27 août 2004
Audience :
International
Main work title :
Numerical Models in Geomechanics
Editor :
Pande, G. N.
Pietruszczak, S.
Publisher :
Balkema
Peer reviewed :
Peer reviewed
Available on ORBi :
since 12 August 2009

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