[SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

Humberto · 2013-02-07 01:09:08

YOU MAY DOWNLOAD THE WORKING MODEL AT THE END OF THIS POST.

Hello I am posting an example of a Reinforced Concrete beam modeled as POU_D_TGM that is almost working. just one exception on the last command.

I modeled the Steel bars with ELAS and ECRO_LINE for the concrete I did the same thing, although I was thinking of modeling it with CABLE and give it a very low Young's Modulus for tension Et and the normal Youngs for compression. Is this the correct way?

Neverthless I am posting the mesh, command and the salome files If someone could help me get it right I would really appreciate it.

Humberto H.

Last edited by Humberto (2013-02-28 00:15:41)

Attachments:
Beam.7z, Size: 19.44 KiB, Downloads: 514

jeanpierreaubry · 2013-02-07 09:00:54

hello

i would not be so optimistic with the result as you are,
according the 'Message.mess' file
your calculation fails very early in the AFFE_CARA_ELEM command

AFFE_MODELE looks like being no set ok
for POU_D_TGM, AFFE_SECT and AFFE_FIBRE should be used according to U4.42.01

jean pierre aubry

Humberto · 2013-02-07 19:12:42

Thanks so much Jeanpierreaubry, interestingly the keywords AFFE_SECT and AFFE_FIBRE do not exist inside U.4.42.01

do I have to have one mesh (1D) for the beam (concrete) and another for the steel? or is it all taken care with DEFI_GEOM_FIBRE?

Thank you so much for pointing me in the right direction.

Humberto

jeanpierreaubry · 2013-02-07 19:23:42

Humberto wrote:

interestingly the keywords AFFE_SECT and AFFE_FIBRE do not exist inside U.4.42.01

humm! you are right i was looking a very old doc (year 2007)
and the syntax seems to have changed quite a lot since

Humberto wrote:

do I have to have one mesh (1D) for the beam (concrete) and another for the steel? or is it all taken care with DEFI_GEOM_FIBRE?

i guess so
but i cannot help any further as i did not use this element recently
by making a search with POU_D_TGM in this forum you should find some examples

Humberto · 2013-02-07 19:38:11

Thanks, If I manage to make this work I will post the case for other people to use it.

jeanpierreaubry · 2013-02-08 08:28:35

there is no reason not to succeed
instructions may be found here
www.code-aster.org/V2/doc/default/en/man_u/u3/u3.11.04.pdf
and a test case is V6.02.022

Humberto · 2013-02-12 18:47:46

Ok it is almost working, The model goes into the first iteration of time, and gives me an error that honestly I dont understand:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! <S> Exception utilisateur levee mais pas interceptee. !
! Les bases sont fermees. !
! Type de l'exception : error !
! !
! Actuellement, on ne sait dériver que les 'POU_D_E'. !
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Interestingly I am not using any POU_D_E, My modellization is POU_D_TGM
This time my google translator did not help.

Any help will be greatly appreciated.

Humberto.

I am posting the case again. This time it runs on all the instructions without raising any warnings or errors.

Last edited by Humberto (2013-02-12 20:06:52)

Attachments:
Beam.7z, Size: 24.08 KiB, Downloads: 449

RichardS · 2013-02-12 22:59:26

Hello Humbert,

Humberto wrote:

Interestingly I am not using any POU_D_E, My modellization is POU_D_TGM

I think you missunderstood the error message.

   !-----------------------------------------------------!
   ! <EXCEPTION> <SENSIBILITE_52>                        !
   !                                                     !
   ! Actuellement, on ne sait dériver que les 'POU_D_E'. !
   !-----------------------------------------------------!

It states that aster only knows how to derive POU_D_E elements.
It is a bit strange that you get an error concerning sensitivity analysis as I can't see you have it activated in your STAT_NON_LINE.
Perhaps it's a bug or some problem with your installation.

Best regards,
Richard

Last edited by RichardS (2013-02-12 23:00:10)

Humberto · 2013-02-13 01:06:56

RichardS wrote:

Hello Humbert,
It is a bit strange that you get an error concerning sensitivity analysis as I can't see you have it activated in your STAT_NON_LINE.
Perhaps it's a bug or some problem with your installation.
Best regards,
Richard

Richard, thanks for your response. Could you please run this problem on your computer in order to rule out a defective installation on my side?

I would be very grateful.

Humberto

jeanpierreaubry · 2013-02-13 08:16:30

hello

a run on my machine raises the same error
replacing 'POU_D_TGM', by 'POU_D_EM',and it runs ok

one remark: is ever using 'G' beam, with warping, you have to a set a GRX in the DDL_IMPO to restrain the warping otherwise it is not necessary to use this type of beam

finally the error seems to be a limitation of Aster in the present day

jean pierre aubry

Thomas DE SOZA · 2013-02-18 15:05:23

jeanpierreaubry wrote:

hello
a run on my machine raises the same error
replacing 'POU_D_TGM', by 'POU_D_EM',and it runs ok
one remark: is ever using 'G' beam, with warping, you have to a set a GRX in the DDL_IMPO to restrain the warping otherwise it is not necessary to use this type of beam
finally the error seems to be a limitation of Aster in the present day
jean pierre aubry

Indeed the POU_D_TGM model in Code_Aster does not support multiple materials for the moment. That is on one element there must be only one type of material contrary to the POU_D_EM model that does support different materials on each fiber.
An improvement is already underway to extend this feature to all multi-fiber models.

The error message that is being raised is completely out of scope but should be clearer in version 11.

TdS

Humberto · 2013-02-28 00:12:39

Finally the working model posted so everybody can use it.

Humberto

Attachments:
Beam.7z, Size: 31.14 KiB, Downloads: 598

#1 2013-02-07 01:09:08

[SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#2 2013-02-07 09:00:54

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#3 2013-02-07 19:12:42

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#4 2013-02-07 19:23:42

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#5 2013-02-07 19:38:11

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#6 2013-02-08 08:28:35

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#7 2013-02-12 18:47:46

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#8 2013-02-12 22:59:26

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#9 2013-02-13 01:06:56

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#10 2013-02-13 08:16:30

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#11 2013-02-18 15:05:23

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

#12 2013-02-28 00:12:39

Re: [SOLVED] Reinforced Concrete Beam with Pou_D_TGM non linear analysis

Board footer