Shear stiffness as a function of axial force

Katrin · Post by **Katrin** » Sat Aug 05, 2006 2:50 am

Hi,

I would like to model the shear stiffness of a column element as a function of the axial load in the column. I think I would basically need a spring element which stiffness could be written as a function of the load in a different direction than the spring element acts; I could not find a way of modelling it. I was just wondering whether anyone has an idea if such a thing can be modelled.

Thanks for any help!
Katrin

silvia · Post by **silvia** » Sat Aug 05, 2006 8:31 am

people working on shear are:
Filip Filippou @ ucberkeley
John Wallace @ ucla
Ken Elwood @ u. british columbia

Katrin · Post by **Katrin** » Sun Aug 06, 2006 4:57 am

Thanks Silvia! I will check their publications.
I assume from your response that there is no obvious way of modelling such a thing in Opensees?

silvia · Post by **silvia** » Sun Aug 06, 2006 7:14 am

i don't know if ken elwood's element does that, but it is available in openesse, find it in the manual, it is called:
Limit State Material

in the contributed uniaxial materials