This paper presents advances in design optimization of two-way post-tensioned (P/T) concrete slab using a metaheuristic-based simulated annealing algorithm for solving nonlinear constrained optimization problems. The prototype slab is a 4-span P/T flat plate that takes into account the slab band as an alternative solution for design improvement. The objective is to obtain a slab that complies with ACI 318-14 requirements and other practical design recommendations while minimizing the amount of concrete, formwork, and P/T work. In addition, the shape design optimization scheme allows the program to decide whether to use the slab band for the exterior or long interior spans if this results in a better design.
