Laurent Vulliet

FORMATION 2016 Board Member Certificate, Swiss Board School, Switzerland 2008 AMP (Advanced Management Program), INSEAD, Fontainebleau, France 1986 PhD (Dr sc. tech.), EPFL, Lausanne, Switzerland 1980 Ms, Civil Engineering (Dipl. Bauing. ETH), ETHZ, Zurich, Switzerland ACTIVITES PROFESSIONNELLES 2008 - 2015 CEO, BG Consulting Engineers, Lausanne, Switzerland. 2001 - 2008 Dean, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole polytechnique fédérale, Lausanne (EPFL) 1999 - 2001 Head, Civil Engineering Department, EPFL 1994 - Present Professor, EPFL. Director of the Soil Mechanics Laboratory (1994-2008). Promoted from Associate to Full Professor in 1996. Part-time position since 2008 1989 - 1993 Senior Engineer, De Cérenville Géotechnique SA, Ecublens, Switzerland 1987 - 1989 Lecturer, Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, USA 1986 Invited Researcher, Laboratoire central des ponts et chaussées (LCPC), Paris, France 1981 - 1986 Research assistant, and PhD student, Soil Mechanics Laboratory (LMS), EPFL. Thesis on the modeling of natural creeping slopes. Co-advisors Prof. E. Recordon (EPFL) and Prof. K. Hutter (TU Darmstadt) BOARDS / COUNCILS - Member of the Board of Directors, Implenia, Dietlikon, Switzerland (2016 - present) - Member of the Board of Directors, BG Consulting Engineers, Lausanne (2006 - 2015) - Vice-President, Swiss Society of Engineers and Architects (SIA). 2009-2013. - Member, Foundation Council, Foundation Les Bois Chamblard, financing research in Environmental Sciences at EPFL (focusing on bio-diversity). 2003-present - Member, Foundation Council of the Presses Polytechniques et Universitaires Romandes (PPUR), Lausanne. 1995-present - Member, Stiftungsrat der Präventionsstiftung der KGV (a Swiss foundation for the financing of applied research in the domain of natural risks from Cantonal Building Insurances). 2003-2008 - Member of the Board of Directors, Stump Bohr AG, Nänikon. 1998 2001 PROFESSIONAL SOCIETIES - Swiss Society of Engineers and Architects (SIA) - American Society of Civil Engineers (ASCE) - International Association for Computer Meth. and Advances in Geomechanics (IACMAG) - International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE) - International Society for Rock Mechanics (ISRM) - Swiss Society for Soil and Rock Mechanics (SSMSR) - Swiss Society for Earthquake Engineering and Structural Dynamics (SGEB) SCIENTIFIC COMMITTEES - Swiss National Science Foundation (NSF): member of the Foundation Council and of the Electoral Commission (1996-2003) - Extra-Parliamentary National Commission on Natural Disasters (PLANAT): member of the Commission 1997-2007 (member of the Executive Board from 1997 to 2000) - Natural Hazards Competence Centre CENAT (ETH Domain): founder member and member of the Board of Directors (1995-2007) - Alliance of European Research Laboratories (ALERT), member of the Board of Directors (1995-2009) - Beratende Kommission Swiss Federal Institute for Forest, Snow and Landscape Research (WSL): member (2000-2004) - Centro Stefano Franscini (CSF, Monte Verità): member of the Scientific Advisory Committee (1997-2007) - EPFL Press and Information Commission (CPI). Member 1994-94, President 1995-2000 EDITORIAL BOARDS - Adjunct Editor-in-Chief, Revue française de génie civil (Hermès); founder member (1996-Present). Cette revue est devenue "European Journal of Environmental and Civil Engineering" - Editorial Advisory Board, Int. J. Num. Analyt. Meth. in Geomech., John Wiley (1997-2009). - Editorial Board, Int. J. of Geomechanics (2000-2009). - Editorial Board, Computer & Geotechnics, Elsevier (2001-2009). - Editorial Board, Rivista Italiana di Geotecnica (1997-2009).

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Le cours donne les bases de la mécanique des sols et des écoulements souterrains. Il aborde les notions de caractérisation expérimentale des sols, les principales théories pour les relations constitutives et les écoulements des fluides. Les problèmes types de géotechnique y sont également traités.

Le cours vise à donner les outils permettant d'appréhender de manière fondée et scientifique la question de l'analyse et de la gestion des risques technologiques et naturels, avec une attention particulière portée au domaine du Génie civil.

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Sol (pédologie)

vignette|Le sol recèle un trésor vivant insoupçonné qui représente 50 % de la biodiversité spécifique sur la terre. En région tempérée, chaque mètre carré (sur de profondeur) abrite en moyenne anima

Parameter

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Numerical modeling and neural networks to identify model parameters from piezocone tests: II. Multi-parameter identification from piezocone data

Rafal Filip Obrzud, Andrzej Truty, Laurent Vulliet

This paper completes the study presented in the accompanying paper, and demonstrates a numerical algorithm for parameter prediction from the piezocone test (CPTU) data. This part deals with a development of neural network (NN) models which are able to map multi-variable input data onto typical geotechnical characteristics and constitutive parameters of the modified Cam clay model, which has been applied in this study. The identification procedure is designed for the coupled hydro-mechanical boundary value problem in normally-and lightly overconsolidated clayey soils including partially drained conditions that may appear during cone penetration. The NN models are trained with pseudo-experimental measurements derived with the aid of the numerical model of the piezocone test, presented in the accompanying paper. Different input configurations containing CPTU measurements and some complementary data are studied with respect to the accuracy of predicted parameter values. Finally, the performance of the developed NN predictors is tested with field CPTU data which are derived from three well-documented characterization sites, and the obtained predictions are compared with benchmark laboratory results.

Wiley-Blackwell2012

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Analytical and numerical analyses of the load-bearing capacity of retaining walls laterally supported at both ends

Vincent Labiouse, Aurelio Muttoni, Sylvain Plumey, Laurent Vulliet

This paper investigates the load-bearing capacity of a perfectly smooth retaining wall laterally supported at both ends assuming that the wall fails by the development of three plastic hinges. The study considers the case of a cohesionless elastic–perfectly plastic backfill with a Mohr–Coulomb yield criterion and an associative flow rule in drained conditions. A kinematically admissible soil–structure failure mechanism is proposed and compared with the conventional solutions and with results from a numerical finite element modelling. The study shows that the proposed solution and the numerical solution are in good agreement. These solutions are found to be much more favourable for the wall than the conventional solutions.

Wiley-Blackwell2011

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Numerical modeling and neural networks to identify model parameters from piezocone tests: I. FEM analysis of penetration in two-phase continuum

Rafal Filip Obrzud, Andrzej Truty, Laurent Vulliet

This study presents a numerical approach designed for material parameter identification for the coupled hydro-mechanical boundary value problem (BVP) of the piezocone test (CPTU) in normally and lightly overconsolidated clayey soils. The study is presented in two related papers and it explores the possibility of using neural networks (NNs) to solve the complex inverse problem of the penetration test, including partially drained conditions. It has been demonstrated that the development of NN-based inverse models can be based on training data sets that consist of pseudo-experimental measurements derived from numerical simulations of the piezocone test. The first paper presents the development of the FE model of the studied problem, which can be used to generate a training data population corresponding to typical piezocone measurements that are obtained for clayey soils. The paper contains a detailed description of the numerical model with a sensitivity analysis with respect to different model parameters including the effect of partial drainage. The analysis also includes the model verification by means of a comparative analysis with numerical models of penetration proposed in the literature, as well as experimental evidence. Finally, owing to the loss of accuracy observed when applying a 'rough' frictional interface in the Updated Lagrangian formulation, an equivalent semi-numerical model for the piezocone test is proposed, taking into account a possible occurrence of partial drainage during penetration. Copyright (C) 2010 John Wiley & Sons, Ltd.

Wiley-Blackwell2011

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