Search found 287 matches

by STKO Team
Fri Apr 10, 2020 2:10 pm
Forum: Analysis
Topic: Pushover static analysis error
Replies: 14
Views: 1886

Re: Pushover static analysis error

Your model is still singular, you see it from the error (some elements on the diagonal of the stiffness matrix is 0). This is because you still have disconnected geometries. Same as I explained before, If you have 2 lines in 2 different geometries, even if one of their nodes share the same position ...
by STKO Team
Fri Apr 10, 2020 10:55 am
Forum: Analysis
Topic: Pushover static analysis error
Replies: 14
Views: 1886

Re: Pushover static analysis error

Dear User, I just downloaded your file and had a look. Your model is not running because it is singular. However it is singular because all geometries in your model are disconnected from one another. Looking at your file I understood that you are trying to model using a "orphane mesh" approach, i.e....
by STKO Team
Thu Apr 09, 2020 10:26 am
Forum: Analysis
Topic: Pushover static analysis error
Replies: 14
Views: 1886

Re: Pushover static analysis error

It is fine if you ask OpenSees question here, no problem.
Now your matrix is singular, however there might be many sources of error.
Could you post the *.SCD file here? so we can have a look.
by STKO Team
Thu Apr 09, 2020 9:14 am
Forum: Analysis
Topic: Pushover static analysis error
Replies: 14
Views: 1886

Re: Pushover static analysis error

Dear User,
I don't see what the error is... could you be more specific?
by STKO Team
Wed Apr 08, 2020 4:08 pm
Forum: Condition
Topic: Question about node mass and input ground acceleration data
Replies: 2
Views: 691

Re: Question about node mass and input ground acceleration data

To assign lumped masses to nodes, or distributed or line/face/solid elements: Condition -> add -> Mass , and choose one of the option there, based on the object you want to assign mass to. For example if you want to apply concentrated masses on vertices, you can choose NodeMass before closing the co...
by STKO Team
Wed Apr 08, 2020 3:53 pm
Forum: Property
Topic: Element modeling at the same nodes
Replies: 4
Views: 869

Re: Element modeling at the same nodes

elasticBeamColumn create a physical property of type " section -> Elastic ". There you can input E and G, and you can choose a cross section for sectional properties create the " beam_column_elements -> elasticBeamColumn " element property assign both the physical property and the element property ...
by STKO Team
Tue Mar 31, 2020 12:57 pm
Forum: Geometry
Topic: Geometry Import
Replies: 1
Views: 645

Re: Geometry Import

Probably the IGS is corrupted. Can you post it here so we try to import and see what happes?
by STKO Team
Tue Mar 31, 2020 11:52 am
Forum: Property
Topic: Element modeling at the same nodes
Replies: 4
Views: 869

Re: Element modeling at the same nodes

Dear User, Please forget about the basic procedure of first creating nodes, and then elements that connect those nodes. This approach is the so called "orphane mesh" apprach (typical in software such as SAP2000 or MidasGEN). STKO instead is geometry-based. That is, you first draw a geometry and then...
by STKO Team
Tue Mar 31, 2020 10:09 am
Forum: Condition
Topic: Free Field & Lysmer Kuhlemeyer Boundary Condition
Replies: 13
Views: 2890

Re: Free Field & Lysmer Kuhlemeyer Boundary Condition

Dear vokums, Yes it is correct, in 2D it is sufficient to increase the thickness Yes in 3D what we did is to increase the material properties. In fact in 2D what the element does is just getting the sigma and tangent tensor from the material and multiply them by the thickness before computing intern...
by STKO Team
Wed Mar 25, 2020 9:22 am
Forum: Installation issues
Topic: Running error
Replies: 2
Views: 841

Re: Running error

Dear user, That is not a bug, it is a normal behavior. Probably the first time you used STKO, you had 2 monitors connected to your PC. If this is the case, probably you moved the Physical Property Editor to the second monitor. Then if later on you switch off the second monitor, and you use only 1 mo...