Modified Ibarra-Krawinkler Parameters

[kavir]

Hi
Based on example in your website about MRF with panelzone and description about uniaxialMaterial Bilin there is contradiction. in example is expressed for no deterioration Lambda must be a large number but in command manual section is expressed they must be zero...!
which one is correct؟

[kavir]

hi

Can I use Mr. Lignos's suggested formulas for other than RBS beams to adjust the columns plastic hinges? or there is another formulation for columns?

[Msadegh]

hi
i have the same question , please help us

in this Link : http://opensees.berkeley.edu/wiki/index ... trated.tcl My ( Moment Yielding ) different from the MY Calculated in Lignos's Site ( http://dimitrios-lignos.research.mcgill ... /component )
which one is correct ?

the other question is how to calculate LS , KL , LA , LD

[Allaaldeen]

Hi
I am using Ibarra- Medina-Krawinkler Hysteretic model for concrete columns. The parameters for concrete columns can be obtained from (PEER 2007/03) by Haselton et al.
The parameters for steel members can be obtained from Blume report (TR 177) By Lingnos and Karawinkler. Both reports are accessible to anyone.
Note that lambda values are different depending on the model you are using ( the original model or the modified model) More information is provided in TR 177 page 30.

[Msadegh]

Allaaldeen wrote:
> Hi
> I am using Ibarra- Medina-Krawinkler Hysteretic model for concrete columns.
> The parameters for concrete columns can be obtained from (PEER 2007/03) by
> Haselton et al.
> The parameters for steel members can be obtained from Blume report (TR 177)
> By Lingnos and Karawinkler. Both reports are accessible to anyone.
> Note that lambda values are different depending on the model you are using
> ( the original model or the modified model) More information is provided
> in TR 177 page 30.
Dear Allaaldeen
Thanks for reply , but i didn't understand meaning of TR 177 ,please explain more such as exactly title of report

[Allaaldeen]

"sidesawy collapse of deteriorating structural systems under seismic excitations" by Lignos and Krawinkler, Blume earthquake engineering center. Report number 177.

[AngusHunter]

Hi, Allaaldeen, it is hard to read the TR 177 in my collage, could you please tell me how to get it or another way to read the similar paper ? Thanks a lot in advance.

[selimgunay]

You can directly access this report from here:

https://stacks.stanford.edu/file/druid: ... Lignos.pdf

[AngusHunter]

selimgunay wrote:
> You can directly access this report from here:
>
> https://stacks.stanford.edu/file/druid: ... Lignos.pdf

THANK you!