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FORMATION ITechCode_Aster et Salomé-
Méca –
module 4 : Génie Civil(ARN3960)
Recherche & Développement
24-25 mai 2018
Copyright © EDF 2018 – S. Michel-Ponnelle
| 3Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 4Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 5Aster Génie Civil | 24/05/2018
« STATIC » ANALYSIS
Linear or non-linear thermal calculation (THER_LINEAIRE, 3D/PLAN/COQUE
or THER_NON_LINE, PLAN/3D only)
Thermo-hydration of the concrete (THER_NON_LINE, PLAN/3D only)
Drying of the concrete (THER_NON_LINE (diffusion only) / STAT_NON_LINE THH
calculations, PLAN/3D only)
Linear or non-linear static calculation (MECA_STATIQUE or STAT_NON_LINE)
Chained calculationsThermal + static analysis (including structural elements)
Thermal + thermo-hydration + static analysis
Thermal + drying analysis + static analysis (excluding structural elements)
Thermal + Thermo-hydration + drying analysis + static analysis
Coupled THHM calculations for porous media (STAT_NON_LINE, concrete
only, 2D/3D)
| 6Aster Génie Civil | 24/05/2018
SEISMIC ANALYSIS
Spectral method by modal synthesis COMB_SISM_MODAL
“Design“ method
Linear calculations only
Vibration dynamics DYNA_VIBRA
By Harmonic methods
By Transient methods
With modal basis
With physical basis
Localized nonlinearities : shock, friction
Transient dynamics DYNA_NON_LINE
Behavior nonlinearities : plasticity
Geometric nonlinearities : large displacements, friction
| 7Aster Génie Civil | 24/05/2018
OTHERS
Calculation of reinforcement by the
Capra and Maury method CALC_FERRAILLAGE
CODIFICATION =‘EC2’ or ‘BAEL’ or ‘UTILISATEUR’
Impact analysis in explicit dynamic
CALC_EUROPLEXUS (interface with EUROPLEXUS)
Flow of a fluid in a cracked concrete structure
in 2D MACR_ECREVISSE
Injection of a hot gaz in a cracked concrete :
temperature
Reinforcement map of a floor
2018
| 8Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 9
THE FINITE ELEMENTS MODELS (MECHANICS)
Several types of finite elements for describing concreteThe isoparametric finite elements : 2D (triangle or quadrangle, linear or quadratic)
or 3D (hexahedron, tetrahedron, pentahedron, pyramid, linear or quadratic)
Plates : DKT (triangle or quadrangle linear),
(DST or Q4G for elastic simulation)
Shells : COQUE_3D (quadrangle or triangle square) or SHB
Euler beams : POU_D_E
Timoshenko beams : POU_D_T
If you need help to choose the best formulation : cf. [U2.02.01]
Aster Génie Civil | 24/05/2018
| 10
THE FINITE ELEMENTS MODELS (MECHANICS)
Several types of finite elements for describing steel3D/2D
1D elements: BARRE (3D), 2D_BARRE (2D) or beam elements ( POU_D_T,
POU_D_E)
Plate elements: GRILLE_MEMBRANE (3D), MEMBRANE (3D), GRILLE_EXCENTREE
(DKT)
Models for reinforced concreteMulti-fiber beams (POU_D_EM, POU_D_TGM)
DKTG plates
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| 11Aster Génie Civil | 24/05/2018
CONSTITUTIVE LAWS FOR CONCRETE
Elasticity with shrinkage optionally taken into account
Thermal strains
Drying shrinkage
Endogenous shrinkage
The temperature T, the water concentration C and the hydration x
are control variables.
Be careful ! T is the only control variable for the structural elements
)( refth TT
x
re
rd CC )( 0 K_DESSIC and/or B_ENDO
with DEFI_MATERIAU/ELAS_FO
ALPHA with
DEFI_MATERIAU/ELAS or
ELAS_FO
| 12
BETON_GRANGER(_V) [R7.01.01]
basic creep (+ aging effect & humidity effet )
group in series of Kelvin models (8) (linear viscoelasticity)
𝜺𝒇𝒍 𝒕 = 𝒌 𝒕𝒄 𝑱(𝒕, 𝒕𝒄) 1+ 𝝊𝒇 ℎ𝝈 − 𝝊𝒇 𝑡𝑟 ℎ𝝈 𝑰
𝑱 𝒕, 𝒕𝒄 =
𝒔=𝟏
𝟖
𝑱𝒔 𝟏− 𝒆𝒙𝒑 −𝒕 − 𝒕𝒄𝑻𝒔
BETON_UMLV [R7.01.06]
Basic creep + drying creep + shrinkage
Non-linear model based on the work of F. Bendboudjema in Marne-la-Vallée
+ Bazant model for drying creep
Aster Génie Civil | 24/05/2018
CONSTITUTIVE LAWS FOR CREEP OF
CONCRETE (1/2)
fle
fdfd
i
fd
r
fs
i
fs
r
rerdthe )()(
).( ss h ).( dd σh
| 13
BETON_BURGER [R7.01.35]
Basic creep + drying creep + shrinkage
Non-linear model developed by EDF+ Bazant model for drying creep
Better control of the 3D- effect and the long-term evolution of the creep
FLUA_PORO_BETON [R7.01.36]
Basic creep + drying creep + shrinkage
Non-linear model developed by A. Sellier, LMDC
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CONSTITUTIVE LAWS FOR CREEP OF
CONCRETE (2/2)
fdfd
i
fd
r
fs
i
fs
r
rerdthe )()(
Plug-in Salomé
ARCADE for the
identification (in
Salome-
Meca2017)
).( ss h ).( dd σh
| 14
CONSTITUTIVE LAWS FOR CONCRETE :
CRACKING
Modeling damage or cracking of the concrete is not easy.
Problems of reliability, robustness and performance !
No universal model - choose your model according to the problem you
want to solve !
Aster Génie Civil | 24/05/2018
Biaxial strength envelop [Lee et al.] Cyclic response (1D)
| 15
CONSTITUTIVE LAWS FOR CONCRETE :
CRACKING
Non-linear elasticity
Cohesive zone model
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Constitutive law Model Remarks
BETON_REGLE_PR
[R7.01.27]
2D (local) 2*1D variation of regulatory law
BAEL91
Constitutive law Model Remarks
CZM_EXP_MIX
[R7.02.11]
3D_INTERFACE,
PLAN_INTERFACE,
AXIS_INTERFACE
Paths of cracking are pre-defined
| 16
CONSTITUTIVE LAWS FOR CONCRETE :
CRACKING
Isotropic damage
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Constitutive law Model Remarks
ENDO_FISS_EXP
[R5.03.18]
GRAD_VARI Isotropic damage tension /
compression + restoration of
stiffness in compression (V13)
ENDO_ISOT_BETON
[R7.01.04]
Local/GRAD_VARI Isotropic damage in tension +
restoration of stiffness in
compression
MAZARS [R7.01.08] Local
3D or D_PLAN or C_PLAN
Isotropic damage tension /
compression
MAZARS_GC [R5.03.09] Local
1D or C_PLAN
Isotropic damage tension /
compression
Restoration of stiffness in
compression for 1D
| 17
CONSTITUTIVE LAWS FOR CONCRETE :
CRACKING
Orthotropic damage
Plasticity
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Constitutive law Model Remarks
ENDO_ORTH_BETON
[R7.01.09]
Local Orthotropic damage + restoration of
stiffness in compression
Constitutive law Model Remarks
BETON_DOUBLE_DP
[R7.01.03]
Local (regularization with the
Hillerborg method)
Plasticity
| 18
CONSTITUTIVE LAWS FOR CONCRETE :
CRACKING
Orthotropic damage + plasticity
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Constitutive law Model Notes
BETON_RAG
[R7.01.26]
local Visco-elastoplastic damage model
under the effect of the alkali-
aggregate reaction
ENDO_PORO_BETON
[R7.01.36]
local + regularization with the
Hillerborg method
Visco-elastoplastic damage model
| 19Aster Génie Civil | 24/05/2018
CONSTITUTIVE LAWS FOR REINFORCED
CONCRETE
Constitutive law Model Remarks
GLRC_DM
[R7.01.32]
DKTG For a moderate damage,
Symetrical reinforcements
GLRC_DAMAGE
[R7.01.31]
DKTG For impacts
DHRC
[R7.01.33]
DKTG Damage + residual strains
Plug-in Salomé for the identification of DHRC
(in progress)
| 20Aster Génie Civil | 24/05/2018
CONSTITUTIVE LAWS FOR STEELS
Grid reinforcement of concreteGRILLE_CINE_LINE, GRILLE_ISOT_LINE, GRILLE_PINTO_MEN
and ... all the 1D constitutive laws
if 1D not possible : ALGO_1D =‘DEBORST’
1D elementsELAS, VMIS_ISOT_LINE, VMIS_CINE_LINE, PINTO_MENEGOTTO
[R5.03.09] (elasto-plasticity + Bauschinger effect), CORR_ACIER [R7.01.20]
(damageable elasto-plasticity with plastic deformation at fracture depending on the
rate of corrosion)
and ... all the constitutive laws through ALGO_1D =‘DEBORST’
Pinto-Menegotto behavior
| 21
HELP TO CHOOSE THE BEHAVIOR LAW ?
CF. [U2.03.07]
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GRANGER_V[R7.01.01]
GRANGER[R7.01.01]
BETON_UMLV[R7.01.06]
BETON_BURGER[R7.01.35]
Fluage propreok ok ok ok
Fluage de
dessiccation nook nook ok ok
Dilatation
thermique/ Retrait
endogène/
Retrait de
dessiccation
nook nook ok ok
Activation
thermiqueok ok nook nook
Influence du
« vieillissement »(hy
dratation,
polymérisation,...)
ok nook nook nook
Influence de l'âge du
béton au moment du
chargementnook nook nook nook
Influence de la
teneur en eau ok ok v ok
Phénomènes
BE
TO
N_
DO
UB
LE
_D
P
[R7
.01
.03
]
MA
ZA
RS
[R7
.01
.08
]
EN
DO
_S
CA
LA
IRE
[R5
.03
.18
]
GR
AD
_V
AR
I
EN
DO
_IS
OT_
BE
TO
N
[R7
.01
.04
]
EN
DO
_O
RTH
_B
ETO
N
[R7
.01
.09
]
EL
AS
+Z
M_
OU
V_
MIX
[R7
.02
.11
]
BE
TO
N_
RA
G
[R7
.01
.26
]
BE
TO
N_
RE
GL
E_
PR
(X_
PL
AN
ou
DK
T)
[R7
.01
.27
]
MA
ZA
RS
_G
C
(1D
ou
C_
PL
AN
)
[R5
.03
.09
]
Grandeur représentant la
fissuration (et v ariable interne
associée) :
𝑝𝑡,𝑐: plasticité
𝐷𝑡 ,𝑐: endommagement scalaire
𝐵𝑡,𝑐 : endommagement tensoriel
dn : saut de déplacement
Elas: élasticité non-linéaire
𝑝𝑡et 𝑝𝑐(V1 et
V2)
𝐷 (V1) 𝐷𝑡 (V1) 𝐷𝑡 (V1)
𝐵𝑡(V1 à
V6)
et 𝐷𝑐 (V7)
𝛿𝑛 (V7)
𝐵𝑡(V15 à
V20)
et 𝐷𝑐 (V21)
Elas 𝐷 (V3)
Nombre de paramètres
(hors élasticité)6(+3) 6 3(+3) 3 6 4 31(+2) 4 6(+2)
Modélisations disponibles :
L : locale
GV : GRAD_VARI
L L GV L/GV L so L so L
Régularisation énergétique
incluseok nook so nook nook so ok nook nook
Endommagement en traction ok ok ok ok ok ok ok ok ok
Endommagement en
compressionok ok ok ok 7 ok
nook
(élastiq
ue)
ok ok ok
Comportement en cisaillement ok ok ok ok ok nook ok nook so / ok
Restauration de rigidité en
compressionok nook nook ok ok ok ok nook
ok(1D)/noo
k (2D)
Déformations résiduelles
(plastiques)ok nook nook nook nook nook nook nook nook
Paramètres v ariables av ec la
températureok ok nook nook nook nook nook nook nook
Description de la Réaction
Alcali-Granulat (RAG)nook nook nook nook nook nook ok nook nook
Couplage avec d'autres lois via
KIT_DDI :
G : GRANGER_FP
UMLV : BETON_UMLV_FP
G UMLV nook UMLV nook nook ok nook nook
Type de chargement adapté :
M : monotone
C : cyclique
I: impact
M M M M/C M/C M M M C/M
Niv eau de dégradation
atteignable :
- M : Modéré
- R : Ruine
M M R R M R M M M
Type de Modèles :
- R : réglementaire
- I : ingénieur
- E : expertise
E E E E E E E R I/R
Robustesse (facilité de
conv ergence)NS NS M S/NS NS S NS S
M (1D)/NS
(2D)
Some examples from [U2.03.07]
| 22Aster Génie Civil | 24/05/2018
NOTE : JOINT FINITE ELEMENTS
Possibility of using joint (or interface) elements to represent
interfaces
Concrete-steel bond: constitutive law JOINT_BA (fine model) [R7.01.21] : D_PLAN or AXIS for steel and
concrete
constitutive law : CZM_LAB_MIX [R7.01.21] : (GRILLE_)MEMBRANE for steel and
3D for concrete
Joints between dams elements in 2D or 3D [R7.01.25] – in statics and dynamics :JOINT_MECA_RUPT laws based on a cohesive formulation of failure
JOINT_MECA_FROT : elastoplastic version of the Mohr-Coulomb friction law
| 23Aster Génie Civil | 24/05/2018
CONSTITUTIVE LAWS FOR SOILS : CONSISTENT
WITH THM MODELS
Behavior of soils/clayELAS_GONF
CAM_CLAY, BARCELONE
CJS, HUJEUX, MOHR_COULOMB
Elastoplastic behavior of rocksMOHR_COULOMB
DRUCK_PRAGER, DRUCK_PRAG_N_A
LAIGLE, HOEK_BROWN (_EFF) (_TOT)
Viscoplastic behavior of rocksVISC_DRUC_PRAG, LETK, LKR
Thermo-hydro-mechanical coupling (porous media)KIT_HM, KIT_HHM, KIT_THM, KIT_THHM (hyp : isotropy or orthotropy)
| 24
SOME REMARKS
Help for the identification of some behavior laws
Macro-command DEFI_MATER_GC for MAZARS and ENDO_FISS_EXP
Macro-command CALC_ESSAI_GEOMECA to easily simulate typical test (0D)
Plug-in for BETON_BURGER and DHRC (in progress)
V&V file for paraseismic computations : see [A4.01.04]
Behaviour laws concerned : GLRC_DM, MAZARS_GC and ENDO_ISOT_BETON (in
progress)
Structures : SMART model, benchmark SAFE, a fuel building, ….
Aster Génie Civil | 24/05/2018
| 25Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 26
SOIL-STRUCTURE / STRUCTURE-SOIL-STRUCTURE
INTERACTION
Meshing the soil ->behaviour : ELAS, MOHR-COULOMB, HUJEUX,…
Ground springs method : RIGI_PARASOL, to define with AFFE_CARA_ELEM (model
DIS_T or DIS_TR)
Coupling MISS3D / Code_Aster : RIGI_MISS_3D, to define with AFFE_CARA_ELEM
(model DIS_T)
Aster Génie Civil | 24/05/2018
If you need help to choose the best option : cf. [U2.03.07]
| 27
LOADINGS/BC WITH TO 0D ELEMENTS
contact with impact or friction :
model DIS_T or DIS_TR with the behaviour DIS_CHOC or DIS_CONTACT
To take into account some equipments on a surface through distribute masses :
model DIS_T with CARA_ELEM/MASS_REP
To connect 2 models with AFFE_CHAR_MECA :
- Keyword LIAISON_ELEM : 3D_POU, 2D_POU, COQ_POU, PLAQ_POU_ORTH,
LIAISON_DDL,
- Keyword LIAISON_MAIL : TYPE_RACCORD:’COQUE_MASSIF’, ‘MASSIF_COQUE’
- Keyword LIAISON_COQUE
Aster Génie Civil | 24/05/2018
| 28
Possibility of "automated" treatment of the tendons
especially for the tensioning phase (phasing possible) for 1D
elements thanks to :
DEFI_CABLE_BP / CALC_PRECONT
BARRE modeling
For describing grouted tendons (perfect cable-concrete bond)
Tension to be applied in tendons calculated by BPEL91 or ETCC-2010
formula
CABLE_GAINE modeling
For describing slipping tendons (with or without friction)
Tension obtained by the simulation of the tensioning procedure
Aster Génie Civil | 24/05/2018
TENSIONING PRESTRESSING TENDONS
| 29Aster Génie Civil | 24/05/2018
Tension profil for a « circular » tendon :
Comparison of different modelings
More details in the slides « Modeling of the
prestressed reinforced concrete »
| 30Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 31Aster Génie Civil | 24/05/2018
PRE/POST-PROCESSING TOOLS
Visualization of some characteristics of the structural elements :
section, material, etc. see [U7.05.21]
Command IMPR_RESU(FORMAT=‘MED’,
CONCEPT=_F(CARA_ELEM=cara),
_F(CHAM_MATER=champmat),
_F(CHARGE = charg1) )
+ open with Paravis
| 32
PRE/POST-PROCESSING TOOLS
Vizualisation of the stress field or strain field with Paravis for
multi-fiber elements (POU_D_EM) and multi-layer elements (DKT)
Command IMPR_RESU_SP
-> archive tar.tgz
- open with Paravis the file .pvd
Example : crossarm of a lattice tower
SSNL135A/SV1.01.01 §7
Aster Génie Civil | 24/05/2018
| 33
PRE/POST-PROCESSING TOOLS
Vizualisation of the orientation of structural elements
Command IMPR_RESU(FORMAT=‘MED’,
CONCEPT=_F(CARA_ELEM=cara, REPERE_LOCAL=‘OUI’, MODELE=MO) )
->resu.med
open with Paravis :
- CellCenter Filter
- Glyph Filter for REPLO_1,
REPLO_2,
REPLO_3
Aster Génie Civil | 24/05/2018
| 34
PRE/POST-PROCESSING TOOLS
Vizualisation of (Fint,Mint) for structural elements; see [U7.05.21], §6
IMPR_RESU(FORMAT=‘MED’, CONCEPT=_F(CARA_ELEM=cara,
REPERE_LOCAL=‘ELNO’, MODELE=‘MO’))
+ IMPR_RESU(FORMAT=‘MED..) of the field EFGE_ELNO
open with Paravis
Aster Génie Civil | 24/05/2018
| 35Aster Génie Civil | 24/05/2018
PRE/POST-PROCESSING TOOLS
Calculation of strains (CALC_CHAMP), see [U2.01.05]
EPSI_ELGA / EPSI_ELNO : total strains
EPME_ELGA / EPME_ELNO : mechanical strains
EPVC_ELNO or EPVC_ELGA : strains due to control variables (hydration,
drying, temperature)
EPFP_ELGA / EPFP_ELNO : creep strains (BETON_UMLV, BETON_BURGER
or BETON_GRANGER laws)
EPFD_ELNO / EPFD_ELGA : drying creep strains (BETON_UMLV,
BETON_BURGER laws)
DEGE_ELNO : generalized strains (linear elasticity)
| 36Aster Génie Civil | 24/05/2018
PRE/POST-PROCESSING TOOLS
For stresses calculation, see [U2.01.05]
SIEF_ELGA / SIEF_ELNO : stresses
EFGE_ELGA / EFGE_ELNO : generalized forces
SIPO_ELNO : Computation of the stresses in the section of beam broken
up into contributions of each generalized force.
SIRO_ELEM : the normal and tangential stresses to the faces of the
elements, calculated at the center of faces (SIG_N, SIG_T1,SIG_T2)
Visualization of stresses
| 37Aster Génie Civil | 24/05/2018
PRE/POST-PROCESSING TOOLS
For the calculation of stresses in structural elements, see
[U2.01.05]
SIGM_ELNO
EFGE_ELNO : structural efforts
EFCA_ELNO : structural efforts in the global coordinate
SIPO_ELNO : stresses in the beam section decomposed into contribution
of each structural effort in the local coordinate system (SN, SMFY, SMFZ,
SVY, SVZ, SMT)
SIPM_ELNO : stresses min and max in the beam section (linear elasticity))
SICO_ELNO : stresses in a layer of shell elements
A commandPOST_COQUE : to extract the efforts at any point of a shell (SSLS126B)
| 38Aster Génie Civil | 24/05/2018
PRE/POST-PROCESSING TOOLS
Energy calculations (total energy, kinetic energy, ...)
Work in progress
Dissipation (DISS_ELNO / DISS_ELGA) for the GLRC_DM law
Calculation of masses (POST_ELEM / MASSE )
For dynamic calculations :Keyword OBSERVATION to accurately track the evolution of a quantity in the
calculation without storing all time steps
| 39Aster Génie Civil | 24/05/2018
HOW-TO DOCUMENTS
Panorama of the tools available to carry out civil engineering analysisU2.03.07
General tips for using the operator STAT_NON_LINE/DYNA_NON_LINEU2.04.01 / U2.06.13
General tips for structural elementsU2.02.01 (plates,shells,…), U2.02.03 (discrete elements)
Strains, stresses, generalized forces,…U2.01.05
A civil engineering study with tendonsU2.03.06
A civil engineering study with seismic loadingU2.06.10
Several documents for modeling the Soil-structure interaction (SSI) U2.06.05, U2.06.07, U2.06.08 [restricted access], U2.06.12 [restricted access]
Performing damage calculations in quasi-static analysisU2.05.06
Etc …
| 40Aster Génie Civil | 24/05/2018
OUTLINE
Types of analysis
Modeling and constitutive laws
Special Loadings/Boundary conditions
Pre/Post Processing tools
Some examples
| 42Aster Génie Civil | 24/05/2018
SIMULATE THE AGING OF A REINFORCED
CONCRETE STRUCTURE OVER 60 YEARS
3D concrete
Reinforcing steel
Prestressing tendons
| 43Aster Génie Civil | 24/05/2018
SIMULATE THE AGING OF A REINFORCED
CONCRETE STRUCTURE OVER 60 YEARS
Applied loads over time
Tension CH
Dome
Tension CV
VC1
VD1
VD2
VD3
VD4
VD5
VD6
7000 400 949058402190760 2044013140 16790 24090
Building (6 years) Operation (60 years)
Thermal dilatation
Drying shrinkage
Creep / drying creep (BETON_UMLV_FP)
Endogenous shrinkage
| 44Aster Génie Civil | 24/05/2018
SIMULATE THE AGING OF A REINFORCED
CONCRETE STRUCTURE OVER 60 YEARS
Evolution de la concentration en eau dans l'épaisseur, au cours du temps
40
50
60
70
80
90
100
110
120
130
0,00 0,20 0,40 0,60 0,80 1,00 1,20
épaisseur (m)
co
ncen
trati
on
(l/m
3)
0
29
182,25
400
758
1474
2190
4035
5840
7687,5
9490
11337,5
13140
14987,5
16790
18637,5
20440
24090
Perte de tension dans les câbles
0,00E+00
1,00E+06
2,00E+06
3,00E+06
4,00E+06
5,00E+06
6,00E+06
7,00E+06
8,00E+06
9,00E+06
0 5000 10000 15000 20000 25000
temps (jour)
ten
sio
n N
(N)
câble horizontal (H3) câble vertical (V1)
déformation orthoradiale à coeur
-3,00E-03
-2,50E-03
-2,00E-03
-1,50E-03
-1,00E-03
-5,00E-04
0,00E+00
5,00E-04
0 5000 10000 15000 20000 25000
temps (jour)
EP
Stt
déformation totale déformation fluage propre déformation fluage dessiccation
Evolution of the water content
Evolution of the tension in the tendons
Evolution of the strains
| 45
SIMULATE THE AGING OF A REINFORCED
CONCRETE STRUCTURE: VERCORS MOCK-UP
Ø ~ 15 m
H ~
20
m
Geometry and mesh via Salomé : concrete (3D), tendons (1D)
Thermic + Drying (SECH_GRANGER) + delayed strains (BETON_BURGER)
>300 000 noeuds
Version 12.4 Code_Aster®
Duration : ~13h (ther) ~4j (meca)
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| 46
Creep overestimated with
actual parameters before the
heating inside the mock-up
Interest
Zone
CIRCONFERENTIAL STRAINS = F(TIME)
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| 47Aster Génie Civil | 24/05/2018
BEHAVIOR IN CASE OF SEVERE ACCIDENT
First step : strain at 60 years
(creep)
Second step : stress with high pressure (~0,5 MPa)
and high temperature (150°C)
| 49Aster Génie Civil | 24/05/2018
SIMULATION OF A BEAM AT EARLY AGE
+ 4-POINTS FLEXION TEST
Free shrinkage beam : 4-point flexion test
48 days after casting
The results are satisfying for
temperature at early age
Results obtained with Code_Aster
(local isotropic damage model)
| 50
Mean opening for cracks: 234 µm
SIMULATION OF A 3 - POINTS BENDING TEST
ON A REINFORCED BEAM WITH CZM
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MECHANICAL BEHAVIOR OF CONCRETE PIPES
WITH METAL WEB
Cracking
Plastification of reinforcement bars
Corrosion of the metal pipe web
(CORR_ACIER)
Impact of corrosion on the mechanical resistance
0
5
10
15
20
25
30
0 2 4 6 8 10 12 14 16 18
Flexion (mm)
Force (
ton
nes)
Tuyau 5 - Partiellement corrodée
Tuyau 5 - exp. - Partiellement corrodée
Tuyau 5 - Corrosion variable
Map of damage + deformations
force / bending curve (tests / calculation)
Test device
| 52
UNDERGROUND EXCAVATION
2D modeling using convergence-confinement method
Mechanical law : specific elasto-visco-plastic law (LKR)
Coupling or not with hydraulic (HM simulation)
Using of a regularization modelPlastic strain hardening
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SIMULATION OF THE ALKALI-AGGREGATE
REACTION (RAG)
Validation on an industrial case : an existing dam segment (BETON_RAG)
| 54Aster Génie Civil | 24/05/2018
SIMULATION OF A CONCRETE DAM
Modeling of the joining up(*) and the friction between arch dam
segments
Hydromechanical modeling of the joint between the rock and the
dam foundation
* The joining up consists to fill the joints between the blocks at the end of construction of dam by grouting, to ensure the transmission of forces to the rock
| 56Aster Génie Civil | 24/05/2018
STUDY OF COOLING TOWERS
Amplified displacement of a
cooling tower under wind load
(shell)
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A TGV ON AN AGING PRESTRESSED
CONCRETE BRIDGEVertical accelerations at ballast
multifiber beam
cracking
dynamic
rolling load
| 58Aster Génie Civil | 24/05/2018
BENCHMARK SMART
Reinforced concrete structuresnonlinear GLRC_DM constitutive law
| 59Aster Génie Civil | 24/05/2018
SEISMIC CALCULATION OF DAMS
Taking into account the energy dissipated in the soil and dam
waters : Soil-Structure Interaction, Soil-Fluid-Structure Interaction
Mode of an arch damStresses in a dam under seismic loading
| 60Aster Génie Civil | 24/05/2018
EARTH-FILLED DAM SIMULATION
-3
-2,5
-2
-1,5
-1
-0,5
0
0,5
1
1,5
2
2,5
3
3,5
0 0,5 1 1,5 2 2,5 3 3,5 4 4,5 5
TIME [S]
ACC [M/S/S]
ACCELERO
N36
N109
N237
N1099
N950N36
N109
N237
N1144
Layered construction Watering Seismic loading
| 62Aster Génie Civil | 24/05/2018
End of presentation
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