Hello AP92,
Sap2000 version 15 and higher has a tool display the reinforcement design for slab base on DIN. EN 1992, sandswich model method. F9 and see Concrete design. (searh in help of sap)
The second way is choose control M11, M22 and shear V13 and use your related code to design for bending reinforcement and shear rebar.
Best Regard
Thanh,