Search found 93 matches

by esi_opensees
Fri Oct 03, 2014 11:24 am
Forum: OpenSees.exe Users
Topic: MDOF Mass-Spring model
Replies: 4
Views: 2229

Re: MDOF Mass-Spring model

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....
by esi_opensees
Fri Oct 03, 2014 10:29 am
Forum: OpenSees.exe Users
Topic: MDOF Mass-Spring model
Replies: 4
Views: 2229

Re: MDOF Mass-Spring model

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 ...
by esi_opensees
Fri Oct 03, 2014 3:51 am
Forum: OpenSees.exe Users
Topic: MDOF Mass-Spring model
Replies: 4
Views: 2229

MDOF Mass-Spring model

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...
by esi_opensees
Wed May 29, 2013 11:38 pm
Forum: OpenSees.exe Users
Topic: floating-point number
Replies: 1
Views: 1249

floating-point number

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 ...
by esi_opensees
Thu Sep 06, 2012 9:09 pm
Forum: OpenSees.exe Users
Topic: percentage difference
Replies: 1
Views: 314

percentage difference

hi

how much difference between opensees and theorical results is reasonable? (What percentage?)
by esi_opensees
Fri Apr 13, 2012 12:04 am
Forum: OpenSees.exe Users
Topic: non-prismatic section
Replies: 1
Views: 547

non-prismatic section

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...
by esi_opensees
Fri Apr 06, 2012 8:02 pm
Forum: OpenSees.exe Users
Topic: buckling load
Replies: 3
Views: 454

Re: buckling load

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.
by esi_opensees
Wed Feb 22, 2012 8:51 pm
Forum: OpenSees.exe Users
Topic: shear in nonlinear formulation
Replies: 3
Views: 369

Re: shear in nonlinear formulation

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...
by esi_opensees
Wed Feb 22, 2012 2:46 am
Forum: OpenSees.exe Users
Topic: shear in nonlinear formulation
Replies: 3
Views: 369

shear in nonlinear formulation

Hi all

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

tnx.
by esi_opensees
Tue Feb 14, 2012 7:38 am
Forum: OpenSees.exe Users
Topic: steel connection
Replies: 7
Views: 1435

steel connection

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.
by esi_opensees
Sat Feb 11, 2012 10:06 am
Forum: OpenSees.exe Users
Topic: error in loading a page
Replies: 2
Views: 339

error in loading a page

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?
by esi_opensees
Fri Feb 10, 2012 11:22 am
Forum: OpenSees.exe Users
Topic: BeamColumnJoint Example
Replies: 1
Views: 434

BeamColumnJoint Example

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
by esi_opensees
Mon Jan 16, 2012 6:46 am
Forum: OpenSees.exe Users
Topic: opensees.exe is closed, suddenly
Replies: 1
Views: 273

opensees.exe is closed, suddenly

Hi

when i run my script, the opensees.exe is closed, suddenly, why?
by esi_opensees
Fri Dec 16, 2011 9:24 am
Forum: OpenSees.exe Users
Topic: beamWithHinges
Replies: 2
Views: 742

Re: beamWithHinges

why not?!
by esi_opensees
Fri Dec 16, 2011 9:18 am
Forum: OpenSees.exe Users
Topic: cyclic load
Replies: 2
Views: 749

Re: cyclic load

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