steel frames

[negin]

hi,

i am trying to analyze some simple steel frames and i want to record
the force at the occurrence of first plastic hinge and the total strength
of frame when the system became a mechanism.
please help me.

thanke you

[silvia]

you'd had to do this in post-processing.

[ahmetalperparker]

Hi,
what you have to do is first read the manual carefully, I know reading it may be time consuming but it defines all the concepts to define your model. Also you can look at the examples, which involves similar models to your model.
Hope it is usefull....
Ahmet Alper Parker

[negin]

dear friends
thank you for ur helps, sorry bcaz i am a new user and i don't have enough detailed informations about OPENSEES
please explain more about post-processing steps or other user guide or solved examples.
thank you very much

[silvia]

please review the user manual and use recorders to record data where you want it -- the critical sections.

[azari]

hi negin,
did you find how to find the 1st occurance of plastic hinge?
Hoda


Sharif University of Technology

[negin]

Hi Hoda

Sorry, I saw your message this morning. I had some problems!

You know, I couldn’t find special tools in this regard. In fact, it seems that OpenSees don’t show plastic hinge formation automatically like some other finite element packages. So, I think you yourself should determine plastic hinge formation by checking the stresses or moments in the probable places.

Thank you
Negin