Modelação por elementos finitos de tabuleiros de pontes rodoviárias com vigas retas em concreto armado

Abstract

When the subject matter is about spanning spans up to 25 meters, there is a great tendency to use trays consisting of massive slabs supported by reinforced concrete beams as a structural system of road bridges. In the Brazilian scenario, this is the most adopted superstructure model due to its economic and constructive advantages, which makes this work of great interest, because an analysis of the behavior of these trays in relation to permanent and mobile requests is performed. The present work, in its first part, describes the basic aspects of works with this typology, for instance historical aspects, characterization of its constituent elements, definitions, section models usual in those buildings, types of acting efforts and also calculation methods used in the study sizing of these structures. The study of a tray is then performed by the Classical Sizing Method and by a Finite Element computational Method using Midas Civil software. To achieve the purpose of this work, the calculation processes, parameters and assumptions of both methods are described, and at the end a comparative analysis of the results is performed, aiming to validate the model performed by the computational tool. The results express a close proximity to the values obtained by the different methods, noting a greater conservation in the results of the Classical Method and a detailing of the most refined efforts by the Finite Element Method. It is concluded that the objectives proposed in the elaboration of this project are achieved, considering the obtained results are significant, thus contributing for future studies.