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We couldn't get the eigen vectors, could we?

Thank you Dr. McKenna I wnat to get mode shapes from the recorder files. I could get mode shepas on Dos screen but i don't know how can i use these format. I mean this code recorder Node -node NodeTags -dof 1 \"eigen 1\" " shows mode shapes on screen but I couldn't use this results. i...

Hi Dr. Frank I realize that in new version of OpenSEES I couldn't get the Recorder results such as Eigen vectors and node displacements during the analysis whereas in older version I could. I mean the Recorder's Files don't fill until the process completed. What should I do to get recorder's results...

Hi You should remove your loadPattern at each step, like : for {set j1 1} {$j1<=$nStep} {incr j1 +1} { remove loadPattern 1; eigen $nMode; pattern Plain 1 Constant { sp ...; }; set ok [analyze 1]; }; This script can get eigen values at each step but actually I don't know is it correct or not.

I'm sorry. I think I made a mistake at my writing. :oops: I performed a "Forced-Based (use loads) Displacement-control (integrator was DisplacementControl)" at first, then with using the displacement results of that analysis I performed a "Displacement-Based (use sp's) with using Forc...

Thank you very much Dr.Frank I used this code : constraints Transformation; numberer RCM; system BandGeneral; test NormDispIncr 1.e-8 1000 0; algorithm Newton -initial; integrator LoadControl 1000; analysis Static; for {set j1 1} {$j1<=$nStep} {incr j1 +1} { remove loadPattern 1; ****some codes to o...

Thank you for replying

But I don't think so.
In 2 analysis (force-based and displacement-based) "recorders" record the same displacement in each stage but only the first stage of shear records accommodated and other remainder stage didn't accommodate.

Thanks a lot

Hi I performed a Force-Based pushover analysis and I got the displacements results for the nodes that I had been applied force on them. After that I performed a Displacement-Based pushover with the displacement results of previous analysis on the same nodes. I expected the same shears in the columns...

Thanks a lot; it works well Just as a note for others I summarize what you said and write here the code. Also I used high stiffness “elasticBeamColumn” instead of rigid link. [code] pattern Plain 1 Linear { sp 51 1 $Displacement(5) sp 11 1 $Displacement(1); sp 21 1 $Displacement(2); sp 31 1 $Displac...

Dear Dr. Francis, Thank you very much for reply Conducting a displacement-based pushover, I mean that in each analysis step, I am going to control lateral displacement of each floor to be a pre-defined percent of top floor’s (node 51), in spite of conventional pushover in which nodal control is appl...

Hi Dears, I Modeled a 5 Story MRF. I want to apply a set of lateral displacement to perform a Displacement-Based Pushover. But I couldn't do this. As mentioned Dr. McKenna I can't use 'Transformation' as my constraints Handler and nor 'penalty' handler didn't converged. now I want to know how I can ...

Thank you Dr. McKenna You mean that error with Transformation-Handler is bug? I received current source and compiled it and used, but the problem is already exists. So currently, how can I apply nodal displacement? I got convergence error using “Lagrange” C-Handler, although using “Transformation” t...

I modeled a 5-story 2-d moment resisting frame. I applied a set of lateral displacement to it. When I change a constraints from Lagrange to Transformation an error took place. "domainChanged has not been called" I dont know when I must call the domainChange function or why did this error o...

Hi basir This is your code i tried to compress your code :wink: [code]wipe set dataDir Data file mkdir $dataDir model basic -ndm 2 -ndf 3 node 1 0.0 0.0 node 2 0.0 3.96 node 3 0.0 7.92 node 4 0.0 11.88 node 5 9.15 0.0 node 6 9.15 3.96 node 7 9.15 7.92 node 8 9.15 11.88 node 9 18.3 0.0 node 10 18.3 3...