Steel Material

a.salmanpour · Post by **a.salmanpour** » Sat Apr 28, 2007 4:20 am

Hi
I want to model buckling restrained braces (BRBs).
How can I define bilinear steel material with different yield stress in tension and compression?
Thanks

silvia · Post by **silvia** » Sat Apr 28, 2007 5:54 am

use the hysteretic material.

and/or you might want to loo at the: Fatigue Material

a.salmanpour · Post by **a.salmanpour** » Sat May 05, 2007 1:27 pm

silvia wrote:use the hysteretic material.

and/or you might want to loo at the: Fatigue Material

Hi
I examine the hysteretic material but this material shows pinching behavior.
How can I define bilinear steel material with different yield stress in tension and compression without pinching behavior?
thanks

silvia · Post by **silvia** » Sat May 05, 2007 5:44 pm

you can play with pinchX and pinchY to not have pinching behavior (compare pinchX=0.2 pinchY=0.8 to pinchX=0.8 pinchY=0.2).
the curved looks like that of steel02, except for the lack of smoothness, but you can have a trilinear curve.

a.salmanpour · Post by **a.salmanpour** » Sun May 06, 2007 7:39 am

silvia wrote:you can play with pinchX and pinchY to not have pinching behavior (compare pinchX=0.2 pinchY=0.8 to pinchX=0.8 pinchY=0.2).
the curved looks like that of steel02, except for the lack of smoothness, but you can have a trilinear curve.

Hi
How does hysteretic material consider kinematic and isotropic hardening?

thanks

silvia · Post by **silvia** » Sun May 06, 2007 8:09 am

i don't think it does, you may have to put it in parallel with the hardening material.