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Dear Frank,

I have tried to run my bridge model using the new release of Opensees, but the problem still remains!

I apologize if I waste your time with my continuous request, but really I don't know what can I do!..
Please, can you suggest me something?

Thanks!!!

Thank you very much, as ususal, for your kind answer! I will wait for your suggestion!

Have a nice weekend!

Giacomo

I sent it!
Thank you very much!!!

I sent it!
Thank you very much!!!

Dear Frank, I continued to look for some solution to my problem. In the imposed motion, I have also defined time series for velocity and acceleration, in addition to displacement. Now it tells me that it cannot finde compatibility between forces and deformations of some elements, even if the behavio...

Dear Frank,

Thank you very much for your kind answer! I will wait for your new suggestion!

Thank!!



Giacomo

Dear Frank,

Thank you very much for your kind answer! I will wait for your new suggestion!

Thank!!



Giacomo

Dear Frank,

I have tried an analysis without Rayleigh damping, but no convergence is got even in this case.

What else can I do?!

Thanks very much for yout kind answer.

Giacomo

Dear Frank,

I have tried an analysis without Rayleigh damping, but no convergence is got even in this case.

What else can I do?!

Thanks very much for yout kind answer.

Giacomo

Thanks for yor your kind answer! Yes. I have used Rayleighdamping (proportional to the mass and initial stiffness matrix), and have calculated the constant considering the first mode and the 75th mode (this correspond, in the linear case, to the mode with non-negiglible modal mass in one of the thre...

Thanks for your reply, Frannk. I'm using in fact some earthquake acceleration recored, from which I have determined the displacement by band pass filtering and double integration with respect to time. The time histories of displacement seem to be good. Moreover, I have in output stresse and strain i...

Dear all, I made a model of a bridge and performed successfully a seismic analysis with a uniform excitation pattern (in terms of acceleration). Now I have moved to analysing the same structure with different support excitation, imposed in term of displacement, and I cannot manage to get convergence...

Thanks Silvia!

Hi all!

How can apply a concentrated viscous damper to a certain dof?
I only know how to define Rayleigh viscous damping.

Thanks!!!

Hi all,

How is it polssible to apply a dynamic load directly to a single dof? I have managed to find just how to apply support excitations!

Thanks!!!!