Christelle Abadie

Research Assistant

Christelle Abadie

Office: Room 10.04, Jenkin building
Phone: +44 (0)1865 2 73129
Fax: +44 (0)1865 2 83301
Email: Contact Search
Address: Department of Engineering Science,
Parks Road,
Oxford,
OX1 3PJ,
U.K.
College: St Catherine's College

 

 

Academic background

After the French “Classes préparatoires aux grandes écoles”, I completed an engineering degree in the French engineering school ENSTA ParisTech (Ecole Nationale Supérieure de Techniques Avancées) and specialised in solid mechanics. In parallel with my third year engineering school, I attended a Masters of Science at ENS Cachan, specialised in structures and materials (TACS), and graduated with first-class honours.

In 2011, I joined the civil engineering research group of Oxford as a DPhil student. My research project is titled “Cyclic loading response of monopile foundations in cohesionless soils” and is detailed below. It is sponsored by EDF Energies Nouvelles and EDF R&D who fund and provide technical support to the project. More information on my academic and professional background can be found on my Linkedin webpage

Research interests

My research is concerned with offshore wind turbine foundation design, exploring experimental and numerical modelling of laterally loaded rigid monopiles. My research project is currently divided into two main phases that are described below: 

1) Laboratory floor model testing of rigid monopiles in cohesionless soils: I am researching the key mechanisms driving the pile response to cyclic lateral loading. The experimental tests involve a range of targeted load cases that provide new insights on the behaviour of a rigid pile to cyclic lateral loading with the aim of improving current design methodology for cyclic loading. The tests are performed with a cyclic loading rig designed in 2004 by Rovere (see picture below) and mimic a typical 2MW offshore wind turbine foundation. The model tests comprise:
- Continuous cyclic loading, up to a 100,000 cycles
- Multi-amplitude cyclic loading tests studying the evolution of the soil-pile interaction during and after storm-type load series
- Damping tests

Experimental test set up
Experimental test set-up

2) Development of a constitutive model that captures the key response of the monopiles: The key mechanisms identified with the laboratory floor tests are integrated within a constitutive model that can lately be used in design, either within the p-y approach or in most sophisticated calculations, such as FEM analysis. This constitutive model is embedded within the hyperplasticity framework developed by Houlsby and Puzrin (2006) and captures trends such as shown in the Figures below in a simple, yet rigorous manner.  

mergedgraphs
Typical moment-rotation results from (a) continuous and (b) multi-amplitude cyclic tests

Publications:

Abadie, C. N. (2015). Cyclic Lateral Loading of Monopile Foundations in Cohesionless Soils. DPhil Thesis, Department of Engineering Science, The University of Oxford. abstract | thesis as pdf

Abadie, C. N., Byrne, B.W. & S. Levy-Paing (2015). Model pile response to multi-amplitude cyclic lateral loading in cohesionless soils. 3rd International Symposium on Frontiers in Offshore Geotechnics (ISFOG). Oslo, Norway. paper | poster

Abadie, C. N. & Byrne, B.W. (2014). Cyclic loading response of monopile foundations in cohesionless soils. International Conference of Physical Modelling in Geotechnics (ICPMG). Perth, Australia. pp. 779–784.

Abadie, C. (2011), Study of the long-term cyclic loading response of piled foundations for offshore wind turbines. Twelfth BGA Young Geotechnical Engineers’ Symposium, Leeds.