Otimização estrutural de uma viga de madeira em situação de incêndio

Abstract

Wooden structures are widely used in civil engineering due to their sustainable characteristics and low cost. However, their vulnerability to fire presents a significant challenge to structural safety. While traditional sizing methods exist, these may result in over-design, thereby increasing project costs when assessed for fire conditions. In this context, structural optimization emerges as an efficient solution to enhance the performance and economy of wooden beams in fire situations, an area that remains underexplored. This study applies two optimization techniques, Solver (Excel) and the Fmincon function (Matlab), to minimize the volume of simply supported wooden beams in accordance with the guidelines outlined in NBR 7190:2022. The study compared the beams under ambient temperature and fire conditions, aiming to reduce volume without compromising structural safety. The results underscore the importance of structural optimization in the development of safer and more economical design solutions.