Análise comparativa em modelos de cálculo de ponte rodoviária

Abstract

This work presents a comparative analysis between results obtained from simplified methodologies (2D) and computacional models (3D) for concrete road slabs and stringers. Although several studies show each methodology in isolation, no comparative analyses between the two procedures were found, especially with real design situation. For this purpose, some examples were made: a bridge with two stringers with the internal cross members detached from the slab; and another structure with 5 stringers with the internal cross members connected to the slab. The simplified methodology in the case of the stringers for load distribution were EngesserCourbon, Leonhardt and Guyon-Massonet, and for the slabs the Rüsch tables were used to obtain the bending moments resulting from the permanent and mobile loading. To obtain the results using the finite elemento method, the ROBOT software was used, and the values obtained by it were considered as a reference. At the end of the work, it was possible to notice that the two-dimensional load distribution methods of GuyonMassonet and Courbon in relation to the three-dimensional methods showed similar results for the internal stringers, while the Leonhardt method led to better precision in the external stringers, and in the cases of slabs the Rüsch tables gave more safer results for the second bridge model.