Primary load case in ANSYS

[balu25]

Dear all,

I have to perform non linear analysis in ANSYS, using (Combin39) with changing their properties in between the load steps. What I need in steps is like that:
1. Model 1 with Combin39 prop. 1(k1)
2. Load it and solve
3. Modify properties of Combin39 (prop. 2 - k2)
4. New load and solving it with keeping the results of Model 1(as primary load case) (see sketch in the attachement).

Has anyone ever done something like that or has an idea how it could be done?

Thanks in advance
Plamen