The OpenSees Community

Hi everybody I want to conduct IDA analysis in OpenSees and I want to proceed the dynamic analysis for each record until a control parameter does not exceed a limit. For example I have the time history of lateral displacement and I want to continue the analysis for each record until Max Displacement...

Hi everybody I have just studied "Modeling SCB frames using beam-column elements" that is one of the examples of "Discovering OpenSees" but I have some questions: 1) about the parameters using to simulate fatigue in the braces I see that the adopted values for $E0 and $m are base...

thank you very much

Hi everybody I want to know what is the difference between "eval recorder" and "recorder command" in OpenSees, e.g. in the following commands of SCBF example in Discovering Opensees? What will happen if we omit eval from the second command? recorder Element -xml "$dataDir/$s...

I have modeled a steel braced frame subjected to earthquake ground motion. In order to simulate buckling response, I used two fiber-based force BeamColumn elements for each bracing member with an imperfection value. But in some large scale factors I have got the following warning messages related to...

Dear vesna I modified the code and managed to get results for the case alpha=1 and harmonic excitation, but I obtained an unexpected result for the hysteretic loop( I mean some fluctuations in the oval shape). Would you mind please give me your e-mail adress so that I send you the code and the obtai...

Dear vesna
I am using the version 2.2.2
Is that command does not work in this version?

Dear all I have a question about using multiple region command for rayleigh damping. I have studied the following Wiki example: http://opensees.berkeley.edu/wiki/index.php/Pushover_and_Dynamic_Analyses_of_2-Story_Moment_Frame_with_Panel_Zones_and_RBS In the above example the rayleigh damping is defi...

Dear vesna
Thank you very much for your kindness and reply
I am going to use it

Dear vesna
Thanks a lot for your reply. I will wait for you to send that model, but I want to know did you notice any problem in my code resulting to such suspect results?

Dear everyone I have some problems in Running the the Maxwell Calibration model (http://opensees.berkeley.edu/wiki/index.php/Calibration_of_Maxwell_Material) I have copied all of the three files but I receive the warning "could not create uniaxialMaterial Maxwell while executing ...." Do I...

Dear all I used the file matTest.tcl in the opensees manual to obtain a force-displacement response of a viscous element. But the results are zero force for the case. Can anyone help to tackle this problem? ---------------------------------------------------------------------------------------------...

Dear vesna Thanks a lot for your reply I should mention that I agree that it is better to define fix boundary condition and rigid beams for gusset plate. About your comment on modeling the imperfection I am not sure to get exactly what you mean. Do you mean there is any other way rather than what I ...

Hi everyone I have a problem with modeling CBF bracing assembly. I know how to model a single strut or bracing members in order to capture its buckling behavior, i.e. dividing it into at least two segments and using beam column elements and assigning an appropriate imperfection value ..., and the re...

Hi everyone I want to know is there any effective way in opensees to assign 2 earthquake records in a sequence with a gap existing between them, like in the case of an aftershock, other than manipulating the earthquake record input file? For example, first earthquake record A is entered and after 1 ...