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Thanks again. Now, for a 2 dof system I got ONE period; how can I get 2 periods? wipe #input set m [expr 100.0/386.0] set numModes 1 # create data directory file mkdir modes; #--------------------------------- #model builder model BasicBuilder -ndm 1 -ndf 1 # nodal coordinates: node 1 0. ; node 2 0....

Thank you very much for your attention; I changed the manuscript as follows; but it gives error message, yet. Would you please guide me? wipe #input set m [expr 100.0/386.0] set numModes 2 # create data directory file mkdir modes; #--------------------------------- #model builder model BasicBuilder ...

Hi, I am going to model a 2-story shear building using Mass-Spring model. The real mode is: http://opensees.berkeley.edu/wiki/index.php/Eigen_analysis_of_a_two-story_shear_frame when I convert it to Mass-Spring model, I face with this error: ArpackSolver : Error with_ saupd info = -9999 Would you pl...

Hi all i want to do a cyclic analysis in a simple frame (1story-1span). when i run the script, opensees gives this error message: expected floating-point number but got "[expr" ... but as you can see in my script, i have defined floating-point numbers for load pattern ($peak). would you pleas guide ...

hi

how much difference between opensees and theorical results is reasonable? (What percentage?)

Hi, I am trying to model a non-prismatic section for a pile. I have used the “element dispBeamColumn”. Section of this pile is increased linearly from top to bottom. When I run my script, output files are empty. Would you please guide me? Tnx. Here is my script: wipe model BasicBuilder -ndm 2 -ndf 3...

Hi

I think that If you use an imperfection about 1/500-1/1000 of member length and plot the load-displacement curve, you can calculate buckling load.

As you know, the Euler beam theory is not suitable for deep beams. In these cases we may use Timoshenko beam theory. The formulation of Timoshenko beam theory for linear analysis is available in the literature. But I have not looked at the nonlinear formulation of Timoshenko beam theory myself and d...

Hi all

Does opensees consider the influence of shear forces in nonlinear analysis formulation?

tnx.

hi all

is it possible to model a steel panel zone in opensees? it seems that BeamColumnJoint Element is used only for RC joint.

tnx.

dear vesna

the guideline for C++ programming which has been referred in http://opensees.berkeley.edu/OpenSees/d ... /style.php is not found. how can we see it?

Hi all

when i run BeamColumnJoint Example http://opensees.berkeley.edu/wiki/index ... intExample , it gives several error messages. would u plz tell me what wrong is?

tnx

Hi

when i run my script, the opensees.exe is closed, suddenly, why?

why not?!

The pattern of loading is determined by pattern command.
For doing a cyclic analysis, refer to manual examples.