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Great day to all, I have classic moment frames with elastic beam and column element and concentated plasticity at both element ends represented by rotational spring. I want to set the moment-rotation relationship in such a way to be proper for the strength and stiffness degradation (or pinching) of ...

Great day to all, I have classic moment frames with elastic beam and column element and concentated plasticity at both element ends represented by rotational spring. I want to set the moment-rotation relationship in such a way to be proper for the strength and stiffness degradation (or pinching) of ...

No idea!

Hi, In most opensees examples the xDamp (damping ratio) is assumed 0.02 for both steel and RC moment resisting frames. I thought 0.05 is the typical damping among engineers. I wish to know the damping ratio for different structural systems, i.e. steel MRF, RC MRF, wall-frame and braced frame. Can an...

Hi,
I am using tclEditor ver 0.3.1 (2001). I wish to know if a newer version is available. Do you use tclEditor for opensees programming?
Thanks

I didn’t think about it. I test it on the cantilever column you said. It seems “The number of parameters I have to create will be equal to number of elements not to number of integration point”. The code is below. I have the message even when the free end displacement of the cantilever beam was corr...

I’ve followed your comments by detail. The frame is analyzed, but the following message appears before analysis. What does it mean? DispBeamColumn2D::setParameter<> - could not set parameter. Parameter::Parameter 1 – no objects were able to identify parameter Section 1 Iz Parameter::Parameter 2 – no...

Thanks for your complete and brief reply. A great help. I will try it
Best Wishes,
Horr

Hi, 1. I wish to know if "geomTransf PDelta" or "geomTransf Corotational" can consider the "Large P-Delta" effect, or it can consider just "small P-delta" in element. 2. If they can't, which procedure is proposed in general? 3. And At the end, what 's the orig...

Thank you, very much. I don't know how to use updateParameter command. All of examples are about soil and permeability. My model is a frame with elastic beams and columns with rotational springs at beam ends (representing concentrated plasticity). The spring behavior is elastic-perfect-plastic. I wa...

Hi,
I want to change one of the beams moment of inertia during the analysis steps. Is it possible?
Thanks

That's exactly what I need.
Thank you, very much.

I emphasize "No Peak-Oriented model, Just a trilinear model like bilinear Steel01".

Thank you

But I had tested these parameters. Now, I 've tested again. Here is the code and the result. It 's not what I need. I wish I could send a stress-strain diagram (JPG file). Is there anyway to attach a file? please run and look at the result. There is stiffness degradation after load vector shifting (...

Dear Vesna,

Thanks for your reply. But I need a material like steel01 (without pinching or damage). Is it possible by hesteretic material. I couldn't match the parameters to gain correct stress-strain relation.