TheThe Seismic Seismic MechanicalMechanical …risedr.tongji.edu.cn/5th_Kwang-Hua_Forum/downfile/2A/C. BERGE... · Alternative Energies & Alternative Energies & Atomic Atomic EnergyEnergy

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


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


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


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.)


� 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


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.


___________________

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]


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

Se

ism

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Iso

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Pro

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sC. Berge-Thierry, Shanghai, China, December 8-10 2012 | PAGE 16

THANK YOU FOR ATTENTION


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TheThe Seismic Seismic MechanicalMechanical …risedr.tongji.edu.cn/5th_Kwang-Hua_Forum/downfile/2A/C. BERGE... · Alternative Energies & Alternative Energies & Atomic Atomic EnergyEnergy