You want to find static stiffness for each element or the whole model? If whole model, probably you can have an idea by looking at the reaction force and the displacement result.
For example I have a simulation model of 3D spring, and I compress the spring vertically. The way I get the stiffness value is to take the total vertical reaction force at one end of the spring (the reaction force lies at the constrainted node/s), then take this value is F(Newton). At the same time iteration, the vertical displacement of the spring is recorded as D(mm). So vertical stiffness K(Newton/mm) = F/D?