Optimal Design of Prestressed Steel and Concrete Composite Beams

Resumo

The application of prestressing techniques is typically associated with concrete structures and has been relatively underexplored in the context of concrete-steel composite beams. The objective of this study is to propose a formulation for the optimal design of prestressed steel and concrete composite beams. The objective function will analyze the costs and final CO2 emissions of the beam. As constraints, the guidelines outlined in NBR 8800:2008 for steel structures and NBR 6118:2021 for prestressing in concrete structures will be adhered to. To solve the optimization problem, the Ant Colony Algorithm (ACO) will be employed. Additionally, a parametric analysis will be conducted and compared with examples proposed in the literature, aiming to identify the key factors that impact the final solution.