Change Non-Linear to Linear Case

[EngineerSE1]

I have a large RSA 2015 model, with a large number of non linear cases and case combinations.

Non-linear supports have been removed from the model, and I would therefore like to set the cases back to the "Linear" type. Does anyone know how to do this? It doesn't seem that it is possible to do it from the "Cases" tab on the load table, or the Combination table, or from the Analysis Types box. Selecting a non liear case from the Analysis Types and clicking on "Parameters", the "Non-linear" box is unticked, even for non linear cases.

There are a lot of loads in the model, removing load cases and starting again really is not a viable option!

Thanks in advance.

[EngineerSE1 · Accepted solution]

Update- turns out there was a non linear support still hiding in the model. Once that was removed, all load cases flipped to linear.......

[ACh_D]

Hi I am interested in how you find the non linear support, I have the same situation and can't find the reason.

[Rafacascudo]

goto support dialog , click on the scissor icon to eliminate all non used support types.

If there are only few left , check them all searching for a nonlinear one on the tabs above(uplift , friction, nonlinear ,gap,etc.

If there are many , goto the support table and check where the culprit is.

Or maybe the support is not the cause. Then check tension or compression only bars , nonlinear releases.  uplift on panels elastic ground , etc

[ACh_D]

i have an uplift defined on my supports while "None" is indicated everywhere. how to delete that?

[Rafacascudo]

Do not need , none means uplift is not activated.

It is something else. Can you zip and attach your model here?

[ACh_D]

Here is the model

[Simau]

@ACh_D 

You don’t need to delete this support as it is not set  non linear

There is no any uplift as all boxes are checked with "none". The uplift indicated is a tittle to name the column

If a box is unchecked, then you may then select the direction of uplift.

[ACh_D]

@Rafacascudo hi, did you get a chance to look at the model?

[Simau]

The member 9166 is set as "tension only". Set it as "truss"

[ACh_D]

got it, thanks a lot!