Análise da redistribuição de esforços para vigas de seção retangular e T segundo a NBR 6118:2023

Abstract

Population growth has resulted in a significant increase in the use of reinforced concrete structures, known for their ease of execution, availability of materials and cost. When cast in situ, this structural system exhibits monolithic behavior. In this context, ABNT NBR 6118:2023 establishes structural assessment criteria such as linear, linear with redistribution, plastic, non-linear and physical model analysis. This work focused on elastic linear analysis and linear analysis with redistribution. The study compared rectangular and T-shaped sections, as well as two- and three-section beams, with the aim of determining the maximum feasible savings for each type of section and the savings resulting from the redistribution of forces, particularly in rectangular and T-shaped sections, in comparison with the elastic linear analysis of rectangular sections. The results revealed that the redistribution of forces provides a better economic performance than the standard rectangular section. In addition, compared to the rectangular section designed by linear analysis with redistribution, the redistributed T-section showed savings of more than three times that of the rectangular section.