Actually for linear elastic material one can also just use the activate deactivate at a load step, and so to switch between loads at different steps. Then you can use this to have the loads you want at the different time steps.
See here for activate/de-act.:
https://www.youtube.com/watch?v=lrmxV-zWqtQ
The dummy steps (inbetween steps) were only used to see that the structure goes back - the dummy step thus does not have any loads in it so all loads are zero there of course :) otherwise the structure would not go back to the undeformed original shape.
All the best
Erik
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