The OpenSees Community

Than you for your reply,andy0071 . I'm afraid you are right

vesna wrote:
> There is material ConfinedDoncrete01 that accounts for FRP in the section.
> See if it is going to work for
> you:http://opensees.berkeley.edu/wiki/index ... 1_Material


Thank you! I tried ConfinedDoncrete01, and I got the degradation. Thank you!

Thank you for your reply,vesna
The largest displacement I can get is 88mm, but I still can't see the degradation (set "fcu=0.8fcc").Is it because of the FRP material ?I am not sure if I have defined the right material .
Thank you!

vesna wrote: > Is your model working if you do eigen analysis? I have tried to change the constituti verelation of concrete(change "set fcu [expr 0.2*$fcc]" to "set fcu [expr 0.8*$fcc]") ,and the load-displacement curve looks smooth, but the strength don't drop after a few cycls,...

vesna wrote: > Is your model working if you do eigen analysis? Now , my model can run successfully, but the result seems wrong. The strength din't deteriorate smoothly, the load-displacement curve looks zigzag. Would you please guild me? Here is my code: wipe; # clear memory of all past model defini...

Dear vesna : > >I am modeling a rectangle column confined with FRP,the result is "bar fail' and "failed to get compatible element forces" , I tried to change the algorithm\the element type \ the number of integration points\the uniaxialMaterial , but failed again. I spent much time on...

vesna wrote:
> The references are listed at the end of the page:
> http://opensees.berkeley.edu/wiki/index ... 1_Material

>Thank you, vesna .

> Hi Armin,
>
> Do you know the definition of "-stRatio"?
Would you please tell me?
Thank you!

Thank you very much,but what's the definition of "$mu' ? The ductility factor of the hoop steel?
If you konw the definition, would you plese tell me? Thank you!

> Hi everybody,
>
> I appreciate if someone let me know about "ConfinedConcrete01
> Material" Are there any references about this new material ? I am building models about FRP confined columns
> Thanks.