Análise comparativa entre métodos de dimensionamento de pavimentos flexíveis: método do DNIT e método mecanístico-empírico do software SisPavBR

Abstract

This paper presents a comparison between the two official design methods of flexible pavements, the DNIT empirical method and the Mechanistic-empirical method. It shows the origins of the empirical method, explaining how and under which circumstances the CBR methodology arises. From this point, it builds a chronology of the development of DNIT method from the 1960s until 2006 (last update), highlighting its key features; Also describes the most common pavement materials used in Brazil. Finally, elaborates the mechanistic-empirical method, explaining its attributes and applying it through the software SisPavBR in structures designed by the empirical method in order to determine the differences between the methods. Thus, it is intended to contribute with the process of change of the design method of flexible pavements that, currently in our country, is based on the empirical method