Análise do comportamento de aços para estruturas de concreto armado submetidos a situação de incêndio

Abstract

The concrete is established as a material that shows good performance in fire situations. However, due to the heterogeneity among its componentes in situations of high temperatures, there are mechanical, physical and chemical changes that can compromise the structural integrity of the elements. Among this constituents steel is a fundamental element, because it is responsible for the resistance of traction efforts that the structural elements are subject. With the aim of analyzing the behavior of steel subjected to fire condition from an experimental procedure, were performed traction assays were the samples were subjected to different temperatures, these being 200, 400, 600, 800 and 1000º C during 60 and 120 minutes each, and subsequently cooled in the open air. Were Used 132 samples with diameter of 10 mm, exposed to fire condition.