Comparação dos resultados obtidos pelo método tabular e pelo Método Simplificado Proposto por Marcelo Mesquita do Amaral, no dimensionamento de vigas de concreto armado em situação de incêndio

Abstract

Safety is an essential factor in the design of structures in general. Thus, it is the responsibility of the structural engineer to anticipate the various scenarios to which a structure may be subjected. Among these, exceptional situations such as vehicle collisions, earthquakes, and fires stand out. A proper structural design aims to anticipate specific conditions that a structure is highly likely to face; in this regard, most structures are subject to the possibility of fire throughout their service life. Therefore, design considerations under this specific condition become of utmost importance in the career of any structural engineer. In this context, the present research seeks to examine two methods of assessing structures under fire conditions, while also providing an overview of the subject. The first method selected was the tabular method, one of the most widely used in Brazil, due to its simplicity and reliability in verifying structures exposed to high temperatures. However, this method is highly simplified and conservative in certain situations. Consequently, for more sophisticated structures requiring strict economic control, the use of more specific analytical methods may be necessary. Nonetheless, such advanced methods can be extremely complex and difficult to interpret. For this reason, Marcelo Mesquita de Amaral, who holds a degree in Civil Engineering and a Master’s in Ocean Engineering from the Federal University of Rio Grande, Brazil, proposed the Simplified Proposed Method (SPM). This method was chosen for this study as it provides a simpler alternative to the procedures established in ABNT NBR 15200. Accordingly, this work aims to compare both methods in order to evaluate the actual feasibility of applying the SPM in the analysis and verification of structures under high-temperature conditions.