04-setra gual expose - code aster
TRANSCRIPT
www.setra.developpement-durable.gouv.fr
Projet ChamoaProjet ChamoaProjet ChamoaProjet Chamoa
Using Code_Aster to calculate Sétra standard bridges
Service d’études sur les transports, les routes et leurs aménagements
2
2
Chamoa - Sétra
07/07/20112
www.setra.developpement-durable.gouv.fr
Sétra
3
3
Chamoa - Sétra
07/07/20113
www.setra.developpement-durable.gouv.fr
Sétra standard bridges�Close or Open Frame Bridge
� Reinforced or Prestressed Slab Bridge
4
4
Chamoa - Sétra
07/07/20114
www.setra.developpement-durable.gouv.fr
Bridge Design softwares
Evolutions
Fortran 77 Fortran 90 +
BAEL/BPEL Eurocode 2
+
Loads Fas 61 Eurocode 1
Chamoa Project
5
5
Chamoa - Sétra
07/07/20115
www.setra.developpement-durable.gouv.fr
Structural analysis�Slightly sqewed bridge (>70 gr)
2D Beam analysis
+
Guyon-Massonet to slab effect
Axe de l’ouvrage
Ligne d’appui 1 Ligne d’appui 2 Ligne d’appui 3
AAP
Biais
P1 P2 Ag Ad
6
6
Chamoa - Sétra
07/07/20116
www.setra.developpement-durable.gouv.fr
Structural analysis�Médium sqewed bridge (> 50 et < 70 gr)
FEM analysis with plate elements
Axe de l’ouvrage
Biais
LGg LGd
E
Epg
Epd
7
7
Chamoa - Sétra
07/07/20117
www.setra.developpement-durable.gouv.fr
FEM criterion choice
�Lounched by « shell script» in batch mode
�Civil engineering scope
�Knowed
�Open
�Free
�Supported
�Documented
8
8
Chamoa - Sétra
07/07/20118
www.setra.developpement-durable.gouv.fr
Specifications�Finite Elements
� Elements DSQ
�Permanent loads� Load functions f(x,y)
�Variable loads � Influence aréa
� Sétra internal component : Trafic
�Aster and Trafic Parallelization
9
9
Chamoa - Sétra
07/07/20119
www.setra.developpement-durable.gouv.fr
Influence area
Slab bridge bending moment influence aréa
10
10 Chamoa - Sétra
07/07/201110
www.setra.developpement-durable.gouv.fr
Parallelization
� Waiting for files .com
� launch Aster by file and by processor(*)
� End of Aster process
(*)on 4*4 processors
� Generate files .com
� waiting for results
� Read files (.med)
� Reinforcing design
Shell Aster
Parallelized
(Back ground task)
Process
Chamoa
(Program C++)
11
11 Chamoa - Sétra
07/07/201111
www.setra.developpement-durable.gouv.fr
Parallelization �Big agregate parallelization without partaging memory
�Global CPU fraction not parallelized : 5%
�Good Amdahl law
�Global reduction factor réduction quasi equal number of processors
�But global elapsed time greater than more bigagregate cpu time.
12
12 Chamoa - Sétra
07/07/201112
www.setra.developpement-durable.gouv.fr
Planning
�Forces validation => 2010
�Reinforcing validation => 2011
�First release => 2012