Search found 93 matches

by esi_opensees
Thu Jan 22, 2009 11:09 am
Forum: OpenSees.exe Users
Topic: critical load
Replies: 5
Views: 1473

The critical load means Euler load…
by esi_opensees
Thu Jan 22, 2009 7:18 am
Forum: OpenSees.exe Users
Topic: critical load
Replies: 5
Views: 1473

critical load

Hello,

Do you know how we can determine the critical load for a simple frame? (2 columns & 1 beam with vertical loads on columns).

Thank you.
by esi_opensees
Thu Jan 15, 2009 8:37 pm
Forum: OpenSees.exe Users
Topic: geometric non-linearity settings
Replies: 3
Views: 1272

geometric non-linearity settings

Hi,

i am modeling a 3D truss. would you please tell me how i can apply the geometric non-linearity settings in opensees.
(i know in ANSYS program this command is: [b]NLGEOM,ON[/b] but how define it in opensees?)
by esi_opensees
Sun Jan 11, 2009 11:02 pm
Forum: OpenSees.exe Users
Topic: force-deflection curve
Replies: 20
Views: 7549

in the hysteretic material command we can assign only 3 points for the negative direction and 3 points for the positive direction.if we want define more points,how can we do it? i used the example which imancivil mentioned above, the opensees gives error. would you please help me? uniaxialMaterial H...
by esi_opensees
Tue Dec 02, 2008 11:47 pm
Forum: OpenSees.exe Users
Topic: Block
Replies: 3
Views: 1224

i think you can block their e-mails. with this, any ip with distinct emails will be blocked.
by esi_opensees
Tue Dec 02, 2008 10:04 am
Forum: OpenSees.exe Users
Topic: force-deflection curve
Replies: 20
Views: 7549

thanks, you are very kind.
:)

now, would you plz tell me the imancivil's opinion is true or false?

tnx.
by esi_opensees
Tue Dec 02, 2008 9:30 am
Forum: OpenSees.exe Users
Topic: force-deflection curve
Replies: 20
Views: 7549

you ridicule me? :cry: i only told my opinions... :(
by esi_opensees
Tue Dec 02, 2008 8:34 am
Forum: OpenSees.exe Users
Topic: force-deflection curve
Replies: 20
Views: 7549

Dear silvia&iman

According to your notions when we applying the behavior of material (Hysteretic material) for entire of structure the value of area is independent (each value is correct). isn’t it?
by esi_opensees
Tue Dec 02, 2008 5:44 am
Forum: OpenSees.exe Users
Topic: force-deflection curve
Replies: 20
Views: 7549

Dear silvia,

would you please tell me why A=1? the area may be greater,equal or less than 1.
by esi_opensees
Mon Dec 01, 2008 6:24 am
Forum: OpenSees.exe Users
Topic: Arc Length settings
Replies: 1
Views: 814

Arc Length settings

Dear friends, i have a problem to set the parameters $arclength $alpha. There is my script at the openSsees community with "Euler load" topic: http://opensees.berkeley.edu/community/viewtopic.php?p=16670#16670 one of the members who is "imancivil" repaired my script and explained about arc-length me...
by esi_opensees
Mon Dec 01, 2008 2:46 am
Forum: OpenSees.exe Users
Topic: Euler load
Replies: 10
Views: 2729

arc-length settings

Dear imancivil

thank you very much. as you mentioned if i use LoadControl integrator, after a few steps analysis fail.

Dear all,

how should i set the $arclength $alpha?
:?:

thnx
by esi_opensees
Sun Nov 30, 2008 11:20 am
Forum: OpenSees.exe Users
Topic: Euler load
Replies: 10
Views: 2729

Daer silvia, in ANSYS to capture the force-deflection curve for a single element it is possible to apply an axial load on a constrained dof. (use BEAM188 element). with doing the nonlinear static analysis the force-deflection curve obtained. but how can i do it in opensees? I look forward to hearing...
by esi_opensees
Sun Nov 30, 2008 10:50 am
Forum: OpenSees.exe Users
Topic: Euler load
Replies: 10
Views: 2729

Dear all,

would u please tell me how i can capture the force-deflection curve for a single element?

what is the problem about my script that attached above? :(

thank u.
by esi_opensees
Sat Nov 29, 2008 10:31 am
Forum: OpenSees.exe Users
Topic: Euler load
Replies: 10
Views: 2729

Euler load

i want to get the Euler load (buckling load). the end supports are hinge. the model has imperfection at the center of element, but the deflection is constant. would u please tell me what the problem is? how can i get Euler load #Units: kg,cm wipe model BasicBuilder -ndm 3 -ndf 6 # nodal coordinates:...
by esi_opensees
Sat Nov 29, 2008 9:08 am
Forum: Soil Modelling
Topic: Elasto-Plastic Material
Replies: 2
Views: 1736

Dear alisa,

thank you for your help. :D