RECTANGULAR FIBER SECTION

[Sylwester]

Dear STKO,
I watched the webinar about distributed plasticity.
I understand that if I want to consider the influence of stirrups, I only specify concrete material for cover, leaving core blank.
I then get a stress-strain response with a Mander model and this is the cross section I assign to my columns.

Now i Have 2 questions:

1
I would like to consider the effect of stirrups at the same time, but I would like to distinguish between different strengths for the concrete cover and the core.
E.g. concrete C20/25 for the concrete cover and C30/37 for the core (Eurocode )
(just making two materials) + the Mander MOdel

I know that if I assign material for core and cover at the same time the plot disappears.
Does this then mean that I do not take into account the influence of stirrups>?

2.
How can I extract data from this graph? When defining the material itself and using the material tester, there is an option to export the data. In this case, I have to copy the graph which is a bit unreadable.

Best regards

[kesavapraba]

Hi,

1
I would like to consider the effect of stirrups at the same time, but I would like to distinguish between different strengths for the concrete cover and the core.
E.g. concrete C20/25 for the concrete cover and C30/37 for the core (Eurocode )
(just making two materials) + the Mander MOdel

I know that if I assign material for core and cover at the same time the plot disappears.
Does this then mean that I do not take into account the influence of stirrups>?

Currently, STKO does not provide an option to choose two grades of concrete. However, you can use two different materials by modifying material properties in the TCL script after generating them by clicking "Write Input." Before that, you should have obtained the relevant parameters from Mander's model for the two materials. You can use the same material tester for this. Out of curiosity, I ask you, how will you ensure that you can use two different concrete grades (one within ties/stirrups and another outside) while constructing the structural member in practice?

How can I extract data from this graph? When defining the material itself and using the material tester, there is an option to export the data. In this case, I have to copy the graph which is a bit unreadable. How can I extract data from this graph? When defining the material itself and using the material tester, there is an option to export the data. In this case, I have to copy the graph which is a bit unreadable.

Only a graph is available for the section; STKO team will consider a request to make the data points available in the future version of STKO.