Topic: Error in LoadElementSelection_beforeStep.bas

Hello!

I get a message after starting analysis from GiD:

Error in base file 'C:/Program Files/GiD/GiD 14.0/problemtypes/Atena/Execute/../include.src.bas/LoadElementSelection_beforeStep.bas' at line number 67: GlobalNodes can't be used in this context. There is no NumFace

The model is available by the link: https://drive.google.com/open?id=1Dnlvm … jfK48is_P4

Re: Error in LoadElementSelection_beforeStep.bas

Dear Pavlo,
1. I don't get the target of your model?

2. Assigning the same material to both 3D and 2D elements does not make much sense (choose Idealisation: Plane Stress or Plane Strain at the Element Geometry tab for membranes). However, if I remember correctly, if you use a 3D material for a 2D element, it gets interpreted like Plane Stress with 1m thickness - is that your intention?

3. Having several separate structures in a single model is not something the numerical solution is designed for.

4. If you only have line supports on 1 edge, the rotational DoF around that edge remains free - a rigid-bopdy motion mode unblocked.

On meshing, I get the message:

Warning: condition 'Load_Force_for_Surface' has flag 'on face elements' and it is applied 'on body elements' for the entity 1

- I suppose this kind of load is only for Surfaces belonging to Volumes in a 3-dimensional model. Maybe Zdenek can explain?

Regards.

3 (edited by pavlo 2019-08-14 15:43:22)

Re: Error in LoadElementSelection_beforeStep.bas

Dear Dobromil,

1. The target is to get an alternative solution of a FE model with inconsistent mesh connected with mster-slave conditions. We've made a comparison of 2 different programs and wanted to have 1 more example. The comparison report is here: https://drive.google.com/open?id=1Y-FKc … 9lyhrRK9vJ
2. I changed to SHELL Concrete-Steel type with base material Elastic.

dpryl wrote:

if you use a 3D material for a 2D element, it gets interpreted like Plane Stress with 1m thickness - is that your intention?

No, I wanted to get bending out of slab plane.
3. This is a linear problem so I don't think it creates any trouble.
4. You are right, I just forgot to lock these DoF.
5.

dpryl wrote:

I suppose this kind of load is only for Surfaces belonging to Volumes in a 3-dimensional model

I redefined the load with the use of self weight.

However, now the model cannot reach convergency... I don't understand why since all materials are elastic... I assigned all possible restraints but it doesn't help... Would you please check revised model: https://drive.google.com/file/d/1PWGfYW … sp=sharing