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Probably the IGS is corrupted. Can you post it here so we try to import and see what happes?

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...

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...

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...

The rectangular fiber section is a special utility that builds a fiber section with 3 groups of fibers: fibers for rebars fibers for core concrete fibers for cover concrete core and cover fibers can have different materials. Now, if you provide the concrete material only for the cover, STKO will aut...

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When you define the Young's Modulus in the Elastic Section, it is meant to be the real elastic modulus of the material. However, in our last webinar of RC frame structure we were dealing with lumped plasticity. In that case I was using a reduced "E" in the Elastic Section to take into account the cr...

Dear Nicola, First, let me explain how you should interpret the results of a zeroLength element: A zero length element is a 2-node element with 1 integration point. So every time you want to visualize results on a zeroLength, use the GaussPlot. The zeroLength element in OpenSees can have up to 6 mat...

No, if you export TCL files and then you modify them manually you can't import them back in STKO. What you could do is to use the AnalysisStep "Custom command" that is basically a TCL script. It is typically used to create operations that are not available in STKO. In this way your TCL script is par...

It is really hard to answer without knowing how the author made its model in OpenSees. If you are using a fiber cross section, you will not observe cyclic degradation (if you are referring to cyclic degradation) unless one of the fiber materials has cyclic degradation in its formulation. For example...