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Hi all!

I want to ask someone about my "problem". I defined an element recorder and I experienced, that Opensees doesnt records the zeroLength element internal forces. Why? I use it to define the elastic support and I want to use the results for modal Pushover analysis.

And where can we find this report?

Oh, and in the envelope recorder I have 13 columns? How???

Note: This is recording a ForceBeamColumn3d element.

Dear all! I have a question about the Element and EnvelopeEnvelope recorder. I've tried to get a column internal forces, but I cannot figure out the output file format. I tried to record 13 elements (14 nodes) internal forces, but in the output file, I get 78 column datas, but I wait 13(elements)*2(...

Hi! I'm working on this method too and I have found a lot of problems solution. Use [nodeEigenvector $node $mode $dir] and write it into a file. Calculate the modal participation ratios and you can sort the mode shapes by the ratios. Here's my script to calculate the modal participation ratios: &quo...

Do you looking for this? I wrote a code which is model independant: proc calculate_modalmass { modeNum dir } { ################################################# #Calcuates modal masses in $modeNum at $dir with: # #(fi_transpose * M * fi)^2 #fi: eigenvector #M: mass diagonal matrix ##################...

Thank you very much McKenna for the fast reply and fast uploading!

Dear all! I've updated the latest Opensees and I wanted to use my scripts to my thesis work. They based on the nodeMass command. From the previous versions, this command's output was the nodal mass + some memory garbage. The nodeMass command with the newer version of opensees now only returns only m...

Does opensees.exe and the tcl file are in the same folder?
If it is not, you has to source like this in opensees:
source d:/tclfiles/example.tcl
Hope it helps!

Thank you for your reply. I made it right to get the correct results. I had to decrease the displacement increment if the solution is not converge. This is an interesting thing. If I want to model the P-Delta effect, I HAD to set the transformation to PDelta. In this case I can lose the geometric st...

I really need an answer pls!

Dear All! I have a lot of experiment about using opensees, because I'm using opensees for my thesis work modeling bridges with nonlinear RC columns for modal pushover analysis. I want to find my errors and I defined a very simple model to check what am I modeling wrong. The model is: - HEA200 steel ...

If you send your email I could give you. It is a bit difficult model, it has a lot of files, I got this from the Standford University.
mhscott wrote:
> Can you post more of your script, like how you define NODES, PX, and PY
> arrays/lists?

I need an answer pls!

And another note for this.
If I change the nodal load row to:
load $node $px $py 0.0 0.0
the following appears:
Node::addunbalLoad - load to add of incorrect size 4 should be 3
This is the opposite of the previous one.