set the deformations to zero for a new load step 1

[jiligeo]

How can I set the deformations to zero before starting a new load step?

In plaxis program it is possible with an option (Reset displacement to zero) in every load step. Is it possible in ANSYS too?
I have to reset the deformations causing the self weight to zero because in reality the dimensions of structure are considering (after) the effect of self weight and in soil mechanics this deformations are high.

Regards
Jili

 

[Drej]

Jiligeo - Resetting all of the displacements in your model to zero is easy:

/solu
alls
d,all,all,0.
solve
save
fini

Since displacement is relative, the above command should return the displacement values back to their original (undeformed) setting. Whether this is realistic or not is another matter, but I don't completely understand your question.


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[jiligeo]

Dear Drej,
thank you for your answer.
I am modelling the effect of a tunnel construction on a building. I have two load steps and I need the difference deformation between them.

In the first load step I define the self weight of soil and structure and it cause about 10 cm deformation. Actually, these deformations had done 50 years before and have not any effect because the dimensions of model are after these deformations but the stresses are important because I use the DP material model and the soil material has internal friction.

In the second load step: I define the tunnel construction using element dead. Displacements in this step are important for me and it is less than 2 cm.
If I do not set the deformations after first load step to zero the results are not true (more than 10 cm) because most of them are from fist load step.

Actually I need the difference deformation between two load steps.
In plaxis program it is possible with an option (Reset displacement to zero) for every load step.
I hope to explain my problem well.

Regards
Jili

 

[Drej]

The command you need to zero the displacements is UPCOORD. Please see the help file for a description.


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