rayleigh damping

[srisri_iitk]

i am quite confused with rayleigh damping, i need to use a constant damping for all modes so how can i define this? is it possible in opensees?

[pallavi]

Hello Srikanth

I am Pallavi from C-DAC Pune, Maharashtra and I am also working on Opesees.
I have installed Opensees on Fedora 5 and installing also on AIX.
May I know on which Operating System You are working. Since I want to do some case studies of EQ related structures. Thought some Examples are available on Opensees Use manual but those having different units othar than SI.

Can You give me some Idea Regarding this.

Thanking You

Regards

Pallavi..

[srisri_iitk]

I am working in windows xp environment
you can download some tcl scripts from boris jeremic home page,
you need to use consistent units i.e you have to follow the same system of units through out your problem

[pallavi]

Hello Srikanth..

Thank You Very much for the information. This will surely help me. I am working on Opensees on Windows, fedora 5.

Regards

Pallavi

[edu1]

Hello everyone...

Damping that is proportional to a linear combination of the stiffness and mass. This assumption has no physical basis but it is mathematically convenient to approximate low damping in this way when exact damping values are not known.