TheThe SeismicSeismic MechanicalMechanical
StudiesStudies LaboratoryLaboratory «« EMSIEMSI » » atat the French the French
Alternative Energies & Alternative Energies & AtomicAtomic EnergyEnergy
Commission: Commission: overviewoverview of missions, R&D of missions, R&D
activitiesactivities, and , and perpectivesperpectives..
C. BERGEC. BERGE--THIERRY THIERRY
[email protected] [email protected]
The Fifth Kwang-Hua Forum, Sanghai, China, December 8-10, 2012| PAGE 1
C. Berge-Thierry, Shanghai, China,
December 8-10 2012, ,
The French Alternative Energies & Atomic Energy Commission
1945 : CEA creation � Atom and its applications for France : defense, energy, health, research, industry
Today and tomorrow
C. Berge-Thierry, Shanghai, China, December 8-10 2012, PAGE 2
CEA 2009 06 25
Today and tomorrow� Reference institution at worldwide level for nuclear energy and other low carbon energies
� One of the leading European organization for technological research
� Key actor of the French nuclear policy
� Currently ~ 16 000 permanent engineers, researchers, technicians and staff
Civil research centers
Military applications
research centers
CEA centers versus Seismic Hazard
CEA sites’ Map
French recent (20 years)seismicity
M<2
2≤≤≤≤ M <3
3≤≤≤≤ M <4
4≤≤≤≤ M <5
M ≥≥≥≥5
Each CEA’s site houses several nuclear facilities
Example for Cadarache:
• 13 active nuclear plants,
• 3 under construction
(RJH, Agate –radioactive wastes treatment,
Magenta - nuclear material deposits site),
• 3 currently making clean. C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 3
CEA UNIT’S IMPLIED IN SEISMIC RISK
Active faults study, wave propagation, soil behavior : CEA/DAM/DASE
http://www-dase.cea.fr/
Mouvement = Source * Propagation * Site =
Installation
Mouvement = Source * Propagation * Site =Mouvement = Source * Propagation * Site =
Installation
Motion
Seismic Risk for
CEA installations
Supervised by CEA/
Structure & Components seismic behavior study: CEA/DEN/DANS/SEMT/EMSI
http://www-tamaris.cea.fr/
Ondes sismiquesOndes sismiquesSeismic waves
Supervised by CEA/
Protection and Safety
Division (DPSN)
Civil Eng. Design for
new plants done by
CEA/DAM/DP2I
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 4
EMSI laboratory’s mission: contribution to earthquake risk mitigation for nuclear and non nuclear structures/systems
R&D R&D in seismic mechanical engineeringin seismic mechanical engineering based on ~ 40 years of experience
� Better understand the behaviour of structures under seismic loadings,
� Validation of computer codes and numerical models,
� Validation of building code, and provide methodologies to diagnose existing facilities
ExpertiseExpertise on nuclear plants regarding seismic regulation (design, re-assessment),
Seismic Qualification on components
StrategyStrategy : Combination of experimental campaigns and numerical simulations
� Improve models to account for complex physical phenomena
and complex structures seismically sollicitated,
� Work on innovative solutions ( base isolation, hybrid tests …).
Experimental installation: TAMARIS Experimental installation: TAMARIS (4 shaking tables, 1 pit, 1 reaction wall).
Simulations: Simulations: multi-physical and multi-scale FiniteFinite ElementsElements code code CAST3MCAST3Mdeveloped by CEA, www-cast3m.cea.fr
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 5
Combining Experiments & Numerical simulations
Seismic experiments(shaking tables)
Numerical SimulationsCAST3M CEA’s code
www-cast3m.cea.fr
Seismic qualification
Complex modellings (geometrical and rheological
structural complexities, materiel non-linearities (steel and
concrete, physical phenomena formulations))
Existing structures: seismic diagnostic,
strengthening, margin assessment
New Plants: regulations improvements, simplified
Methods, criteria and guidelines
Seismic qualification
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 6
4 shaking tables, 1 reacting wall
& a pit
•Azalée : 6 dofs, 100 tons, 6 m x 6 m
Displacement: 0,125 m (horiz.) , 0,1 m (vert.)Vitesse max.: 1 m/sMax Accel: 1 g (horizontal) 1.6 g (vertical)
•Vésuve :
THE « TAMARIS » EXPERIMENTAL FACILITY
•Vésuve : 1 dof, 20 tons, 3,1m x 3,1m
•Tournesol : 3 dofs, 10 tons, 2 m x 2 m
•Mimosa : 1 dof, 10 tons, 2 m x 2 m
•Iris : Hexagonal Pit (allowing to test
elongated structures )
Depth: 15 m Face to face : 4,2 m
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 7
More information … www-tamaris.cea.fr
� 16 permanent positions
� head of lab,� secretary� 5 technicians + 4 engineers on Experimental Platform Tamaris� 5 researchers devoted to numerical analyses & R&D� 1 post doctoral researcher,
Currently 7 Ph.D students,
EMSI TEAM
Currently 7 Ph.D students,
� on Interaction Fluid & Structure Interaction (Paris VI Univ.)� on Civil Eng. Modeling of complex structures
(3D, torsion, non-linearities …) ( )� on seismic isolators (active and semi-active control) (Supelec)� on hybrid-tests (combining experience & modeling) ( )� on Soil & Structure Interaction (seismic field incoherence,
non-linearities…) ( )� on Probabilistic Risk Assessment Methods ( )� on Sliding and Tilting Components (Clermond Ferrand Univ.)
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 9
� Experimental tests valued in safety reports:
• Nuclear Systems & Components « qualification » tests,
• Specific experimental tests as fluid & structure
interactions in reactor core,
• Deformation of fuel assemblages, control rods
performance under seismic vibrations,
• Tanks, stability of waste containers (…)
EXAMPLES OF EMSI’S CONTRIBUTIONS (FROM R&D TO NUCLEAR INSTALLATION SAFETY)
Core reactor (FSI) Tank (FSI) Waste Containers
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 10
IMPROVING CODIFICATION
� Combining Experimental Tests and Modelings (CAST3M):
• Campaigns on concrete walls with various reinforcements:
lessons integrated to regulation evolution (Eurocodes),
• Behavior of piping lines : CEA R&D enables to codify seismic stresses
and update regulation (RCCM and RCCM-X, 2009),
• Carbon Fiber Fabric potential for reinforcement,
Camus 1 (1998) Piping Line testFinite elements modelC. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 11
Assess the seismic tri-dimensional effects (such as torsion)And non-linear response of nuclear reinforced concrete buildings
2 mock-ups (1/4) representative of a half-part nuclear building
Height : 3.6 m - Mass : 44 T (inc. 33 T add. masses)
Design of the specimen according to the French Nuclear Practice
Seismic inputs: 13 Seismic Bi-directionnel tests performed
More than 220 measurements channels (global and local behavior)
SMART PROGRAM (2007 - 2014) – CEA/EDF and IAEA
Experimental campaign 2008 and international benchmark (35 teams from 20 countries) :
• Blind predictive benchmark (conventional design and best estimate methods),
• Predictive benchmark : Comparaison with test results at various levels of seismic excitation including ‘under-design’ and high ‘over-design’ levels,
• Probabilistic approaches (sensitivity and fragility curves).
Two international workshops organised at CEA (2008 and 2010)
SMART 2008 campaign, benchmark & results published in a special Issue of JEE, 2013.
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 12
___________________
INTERNATIONAL BENCHMARK
SMART 2013SMART 2013Seismic design and best-estimate Methods
Assessment for Reinforced concrete buildings subjected to Torsion and non-linear effects
First Announcement
___________________C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 13
Scope .
� Continuation of the International Benchmark SMART 2008 (2008-2010)
� New reinforced concrete mock-up (1/4th scale)
� Natural seismic loadings using AZALEE-CEA 3D - shaking table
� Blind nonlinear numerical computations
� Vulnerability analysis
SMART PROGRAM (2007 - 2014) – CEA/EDF and IAEA
Schedule .
� Kick-off February 2013
� Final workshop : June 2014
Contact: [email protected]
C. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 14
5 initial members
Shared Goals :
Create a R&D community to obtain scientific consensus needed to develop coordinated
approaches for "common" and "special risk" buildings for the best balance between costs
and risk management
Seismology and Earthquake engineering for rISk assessMentParis Saclay Research: SEISM Institute
and risk management
Common wish to create an European scientific reference Center “from the fault to the
structure” with transfer to engineering after integration in the regulation
Create synergies, by bringing together research teams
An opportunity : Paris-Saclay Campus
Wish to open to other partners
21st October 2011 : first scientific seminar
19th December 2012 : official creation of the Institute
Contact: [email protected]
• Multi-partners research (academic teams, end users ..): France (…), Europe (SERIES, E-Fast-,
IRIS), International (OECD, IAEA – Kashiwazaki-KariFrench wa Benchmark, IAEA-ISSC, …)
• R&D – Expertise (including qualification) –
• Conventional / and Special Risk structures & equipments
• Integrated Approach, from the Fault to the Structure (hazard – vulnerabilty & risk),
• Experimental and Numerical Approaches
• Link R&D – Expertise – and Regulation Up Date
• Open to International collaborations & Benchmarks
CONCLUSION – KEY POINTS
Seismic hazard
Soil-Structure Interaction
Structures
Reliability
Equipements
reliability
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sC. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 16