Answer:
No, it is not possible.
A member or a set of members is designed by the model column method as a "structural component". This means that the longitudinal reinforcement is constant over the entire length of the structural component.
The design is carried out by means of the governing internal forces at the governing location of the structural component (a member or a set of members).
The stability analysis involving a curtailed reinforcement over the column can be performed using the nonlinear analysis of compression elements in RF‑CONCRETE Members (RFEM) or CONCRETE (RSTAB).
