If I’m studying a frame (it already exists), and critical factor is 1.60 in the first bucking mode (global buckling), I need to calculate in second order with imperfections. The first question is if it’s better to perform the analysis with several load increments.
Then I can check in RF-Steel EC-3.
This is the model.
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If I study the top member in RF-Steel EC3 checking stability with general method (6.3.4) only in minor z-axis (because I’ve already introduced imperfections) and lateral buckling, as it has an I section with a lower cut I-section, RFEM classifies it as class 3 (in the next image, stability is not activated jet):
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So, if I want to use plasticity capacity, I have to use add-on RF-Plasticity that I have recently bought. But if I do that, I can’t use general method (6.3.4):
![5jEQuTi.png Klicke auf die Grafik für eine vergrößerte Ansicht
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So, I have to use 7GDL:
![1NoHgKn.png Klicke auf die Grafik für eine vergrößerte Ansicht
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But, if I’m using a second order analysis in RFEM, load combinations are selected to design in RF-Steel EC3. If I select second order also in warping analysis, is this correct 2º order + 2 order?
What I would like to do is to check with general method but using plasticity capacities, but I don’t know if that’s possible. How should we proceed if we want to use plasticity capacities?
I’m sorry for the extension of the question. I’m a bit lost.
Then I can check in RF-Steel EC-3.
This is the model.
If I study the top member in RF-Steel EC3 checking stability with general method (6.3.4) only in minor z-axis (because I’ve already introduced imperfections) and lateral buckling, as it has an I section with a lower cut I-section, RFEM classifies it as class 3 (in the next image, stability is not activated jet):
So, if I want to use plasticity capacity, I have to use add-on RF-Plasticity that I have recently bought. But if I do that, I can’t use general method (6.3.4):
So, I have to use 7GDL:
But, if I’m using a second order analysis in RFEM, load combinations are selected to design in RF-Steel EC3. If I select second order also in warping analysis, is this correct 2º order + 2 order?
What I would like to do is to check with general method but using plasticity capacities, but I don’t know if that’s possible. How should we proceed if we want to use plasticity capacities?
I’m sorry for the extension of the question. I’m a bit lost.
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