In this paper, an attempt has been made to extend application of the recently proposed Flexural constitutive model to short- and long-term deformational analysis of flexural partially prestressed concrete members. The proposed calculation technique is applied in a simple engineering technique based on principles of strength of materials and the layered approach. The effect of tension stiffening and non-linear time effects of creep and shrinkage are taken into account. Effective modulus method is used for modeling of long-term deformations. Short- and long-term deformation (curvatures) prediction results were tested against experimental data of partially prestressed concrete beams reported in the literature.