Search found 384 matches

by STKO Team
Mon Jan 18, 2021 9:12 am
Forum: Post processing and data visualization
Topic: Energy dissipation by strcture
Replies: 1
Views: 11

Re: Energy dissipation by strcture

In the new STKO version 2.0.0 (that will be released soon in January) you will have a Python scripting environment that will allow you to extract data from the Output DataBase, and post-process it. For example, you can extract the stress-strain curve for material and numerically compute the bounded ...
by STKO Team
Mon Jan 18, 2021 9:06 am
Forum: Interaction
Topic: soil-structure interaction continuum model
Replies: 21
Views: 1980

Re: soil-structure interaction continuum model

I did not understand your question.
Are you saying that if you use the element's body force it shows pore pressure, whereas if you use equivalent nodal forces (VolumeForce in STKO) it does not?
by STKO Team
Fri Jan 15, 2021 10:33 am
Forum: Post processing and data visualization
Topic: Cannot show pore pressure response
Replies: 3
Views: 19

Re: Cannot show pore pressure response

I can see the water pore pressure. If you refer to the face that you see it only on the corner (8) nodes of the quadratic 20 node element, it's because only the corner nodes have pressure DOFs. This comes from the theory of mixed finite element . Pressure should be interpolated with 1 order less tha...
by STKO Team
Fri Jan 15, 2021 10:24 am
Forum: Interaction
Topic: soil-structure interaction continuum model
Replies: 21
Views: 1980

Re: soil-structure interaction continuum model

Here is the fixed file: pile_YW.zip You correctly understood the concept of the auxiliary surface. In fact, the model was correct. There was only one tiny mistake: Make sure the auxiliary surface has the (possibly) same mesh as the source surface. In your case, I had to impose an EdgeSeed to the bot...
by STKO Team
Fri Jan 15, 2021 9:43 am
Forum: Analysis
Topic: PINCHING IN COLUMN
Replies: 6
Views: 39

Re: PINCHING IN COLUMN

But I have seen, in many papers, people are using steel02. So how come they model the damage using Steel 02.
They can't. Probably they were using a modified Menegotto-Pinto (I think it's called Reinforcing Steel) that has some similar cyclic damage features
by STKO Team
Thu Jan 14, 2021 4:12 pm
Forum: Analysis
Topic: PINCHING IN COLUMN
Replies: 6
Views: 39

Re: PINCHING IN COLUMN

Your steel model does not have damage.
You need to use a steel model that can represent cyclic damage
Here is an example of what I obtain:
U2.png
U2.png (82.3 KiB) Viewed 23 times

Now you can play with the damage parameters to better fit your experimental curve
COLUMN09.zip
(143.59 KiB) Downloaded 1 time
by STKO Team
Thu Jan 14, 2021 3:02 pm
Forum: Interaction
Topic: Element property to Interaction
Replies: 1
Views: 9

Re: Element property to Interaction

Could you please post a screenshot of the whole error messagebox? including the complete traceback
by STKO Team
Thu Jan 14, 2021 10:02 am
Forum: Analysis
Topic: PINCHING IN COLUMN
Replies: 6
Views: 39

Re: PINCHING IN COLUMN

Rather than pinching, it looks like your experimental data is showing cyclic degradation.
You should play with the concrete and steel materials if you are using the fiber section.
Send your file here, I will try to have a look
by STKO Team
Thu Jan 14, 2021 9:59 am
Forum: Post processing and data visualization
Topic: Cannot show pore pressure response
Replies: 3
Views: 19

Re: Cannot show pore pressure response

Can you send us a file (the SCD preprocessor file) so that we can test it?
by STKO Team
Thu Jan 14, 2021 9:57 am
Forum: Interaction
Topic: soil-structure interaction continuum model
Replies: 21
Views: 1980

Re: soil-structure interaction continuum model

When you do not assign any element property to the auxiliary face, STKO will not generate any OpenSees Element in the TCL files, but it will only write the nodes of the auxiliary face. And this is exactly what you want: these "floating" nodes will have 3 DOFs (because they don't have a UP element) s...