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In this forum we'll talk about P.P. for BeamColumn: how to define and assign it to the element.

Hello to everybody!
I would know how to use element properties for Beamcolumn element. I tried to assign them to the element but I have the following error in STKO:

“Python error : Error: cannot find "Option" attribute: File "C:/Program Files/STKO\external_solvers\opensees\mpc_solver_write_input.py", line 247, in write_tcl write_tcl_int(out_dir) File "C:/Program Files/STKO\external_solvers\opensees\mpc_solver_write_input.py", line 175, in write_tcl_int write_element.write_geom(doc, pinfo) File "C:/Program Files/STKO\external_solvers\opensees\utils\write_element.py", line 105, in write_geom __write_geom_domain(pinfo, mesh_of_geom.edges, phys_prop_asn.onEdges, elem_prop_asn.onEdges) File "C:/Program Files/STKO\external_solvers\opensees\utils\write_element.py", line 92, in __write_geom_domain elem_module.writeTcl(pinfo) File "C:/Program Files/STKO\external_solvers\opensees\element_properties\beam_column_elements\dispBeamColumn.py", line 124, in writeTcl internalBeamColumnElement.writeTcl_internalBeamFunction(pinfo) File "C:/Program Files/STKO\external_solvers\opensees\element_properties\beam_column_elements\internalBeamColumnElement.py", line 475, in writeTcl_internalBeamFunction raise Exception('Error: cannot find "Option" attribute') Abort Command: RunAnalysis”

How can I solve it?? Any video tutorial about this topic?

Hi Sabino!
No panic! That error is due to the fact that you assigned the wrong p.p. to the dispBeamElement.
For example, you cannot directly assign an Elastic Section or a Fiber Section or a Section Aggregator. You need to create a Physical Property -> Special Purpose -> Beam-Column -> BeamSectionProperty. In that special purpose property, you can choose the section that you want to assign (i.e. the one that you assigned before in the wrong way), and the integration rule.
Anyway I attached a video of STKO basic workflow from the pre-processor to the post processor:

https://www.youtube.com/watch?v=0lLeIZpLwlQ

Hi Sabino!
No panic! That error is due to the fact that you assigned the wrong p.p. to the dispBeamElement.
For example, you cannot directly assign an Elastic Section or a Fiber Section or a Section Aggregator. You need to create a Physical Property -> Special Purpose -> Beam-Column -> BeamSectionProperty. In that special purpose property, you can choose the section that you want to assign (i.e. the one that you assigned before in the wrong way), and the integration rule.
Anyway I attached a video of STKO basic workflow from the pre-processor to the post processor:

I just want to ask at the moment you have no version of your library for MacOS. Is it possible to release it?

I just want to ask at the moment you have no version of your library for MacOS. Is it possible to release it?

We are currently working on releasing STKO on other operating systems, including MacOS. For the moment however you should use a virtual machine.

Hello,
I hope you can guide me with this question. What is the difference between E of a Material Uniaxial Elastic and Section Elastci. According to your tutorials I see that in the second one the E is the elastic modulus of concrete, however the E in the first one is 100 times greater than the elastic modulus. Could you give me some literature for that?
Thanks,
Nicola

Hi, I believe you add a rigid material (great E) because it is related to the hinge and not to the elastic element.

NicolaTarque wrote: ↑

Thu Mar 12, 2020 5:57 pm

Hello,
I hope you can guide me with this question. What is the difference between E of a Material Uniaxial Elastic and Section Elastci. According to your tutorials I see that in the second one the E is the elastic modulus of concrete, however the E in the first one is 100 times greater than the elastic modulus. Could you give me some literature for that?
Thanks,
Nicola