Firesteel: uma ferramenta computacional para verificação de elementos retilíneos de aço em situação de incêndio

Abstract

This work aims to introduce a computational tool with a graphical interface for the verification of straight steel bar elements in a fire scenario. Fire, defined as the occurrence of uncontrolled fire, generates a rise in temperature in structural components, resulting in material degradation and a reduction in load-bearing capacity. Consequently, the fire phenomenon can compromise the integrity and properties of the structural elements. In this context, considering the effects of temperature increase on structural elements is a crucial topic in structural design to ensure asset integrity and user safety until firefighting and rescue forces act against the fire. Thus, to achieve the proposed objective, the development methodology was based on five major stages: i) study of models and formulations related to the verification of straight steel bar elements and the consideration of thermal effects due to fires; ii) implementation in scripts of the formulations adopted in Brazilian standards for thermal evolution analysis and verification of structural steel elements in fire scenarios; iii) modeling of the graphical interface of the application developed in the Python language; iv) integration between the graphical interface and the formulations implemented in scripts; and v) analysis of results based on examples from the literature. The tool can be applied to verify structural steel elements under isolated or combined mechanical loads, whether the element is surrounded or not by fire protection coating.