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Thanks fmk, As you know it is a simple model. I have checked my script. I cannot find the problem and figure out why this happened. I think it is must the same problem which caused there is not deformation in the ModeShape with DisplayPlane.tcl and DisplayModel3D.tcl. Could you please give me some a...

Hi fmk,

Thank you a lot for your reply.

What is ".. rcond() " mean? And could you please give me some advice on that?

Hi fmk, Thanks for your reply. It is a model of bridge, whose cap beam and girder (I used section Elastic to simulate them) have a large stiffness. So I assign them with a large E(Young's Modulus) ,G(Shear Modulus) and J(torsional moment of inertia of section). I found the problem. If the Yong's Mod...

Hi all. I have a problem with eigen command. When I do eigenvalue analysis, why the eigenvalue change a little every time I run the program. OpenSees > source dip.tcl 1st 1.329422e+003 3rd 1.329488e+003 2.944240e+004 3.479694e+004 4th 1.329237e+003 2.979972e+004 3.463235e+004 1.581617e+005 T1 0.1722...

Silvia, thanks for your response.

But I have changed the element to dispBeamColumn, it does not work.

And I need to fix the bottom of the structure, so could you please give me some advice for the constrains conditon?

Thank you

Dear all, I am a newbie for opensees. I want to do a eigen analysis, but the problem is I got negative eigen value. Could you please help me? This is my script: ################################################# # # # Available unit systems: # 1) SI (kN, kPa, m, ton/m3) # 2) English (inch, kip, kip-f...