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Seismic analysis of the soil-foundation interface: physical and numerical modelling of global tilting an

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Thesis topic details

General information

Organisation

The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.

Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.

The CEA is established in ten centers spread throughout France
  

Reference

SL-DES-25-0088  

Thesis topic details

Category

Engineering science

Thesis topics

Seismic analysis of the soil-foundation interface: physical and numerical modelling of global tilting and local detachment

Contract

Thèse

Job description

Rocking foundations offer a potential mechanism for improving seismic performance by allowing controlled uplift and settlement, but uncertainties in soil-foundation interactions limit their widespread use. Current models require complex numerical simulations, which lack accurate representation of the soil-foundation interface.
The main objective of this thesis is to model the transition from local effects (friction, uplift) to the global response of the structure (rocking, sliding, and settlement) under seismic loads, using a combined experimental and numerical approach. Hence, ensure reliable numerical modeling of rocking structures. Key goals include:
• Investigating sensitivity of physical parameters in seismic response of rocking soil-structure systems using machine learning and numerical analysis.
• Developing and conducting both monotonic and dynamic experimental tests to measure the soil-foundation-structure responses in rocking condition.
• Implementing numerical simulations to account for local interaction effects and validate results with experimental results.
Finally, this research aims to propose a reliable experimental and numerical framework for enhancing seismic resilience in engineering design. This thesis will provide the student with practical engineering, along with expertise in laboratory tests and numerical modeling. The results will be published in international and national journals and presented at conferences, advancing research in the soil and structure dynamics field.

University / doctoral school

Ecole Doctorale de l’Institut Polytechnique de Paris (IP Paris)
IP. Paris

Thesis topic location

Site

Saclay

Requester

Position start date

01/10/2025

Person to be contacted by the applicant

Fares Reine reine.fares@cea.fr
CEA
DES/DM2S/SEMT/EMSI
CEA-Saclay | Bât. 603 PCE 6
Laboratoire d’Etudes Mécaniques Sismique
01 69 08 22 53

Tutor / Responsible thesis director

SEMBLAT Jean-François jean-francois.semblat@ensta-paris.fr
ENSTA Paris, Institut Polytechnique de Paris
Institute of Mechanical Sciences and Industrial Applications
Dépt Mécanique & énergétique / IP-Paris (Resp./Head)
Unité de Mécanique / ENSTA (Dir. Adj./Dep.Head), IMSIA
https://perso.ensta-paris.fr/~semblat/
Tél./Ph. : +33 (0)1 69 31 99 94

+33 (0)1 69 31 99 94

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