Aplicação do método de Fauchart para obtenção dos carregamentos em longarinas de pontes de múltiplas vigas

Abstract

In Brazil, it is common practice to use prestressed concrete multi-beam trays in elevated highways, viaducts and bridges. To analyse the multiple concrete beams superstructure, a grid-based structural model is created. Different methods were proposed to analyse the transversal loads distribution in a tray, such as the Fauchart method (1972), which is of simple application. This work aims to apply this method in a bridge tray, using the Ftool software, and to compare its results with the LIP TQS comercial software. The bridge tray studied in this work is composed of a 20 centimeters slab, a 16.20 meter transverse span, a 40 meter longitudinal span, seven 2 meter high longitudinal girders and two tranverse girders. Initially, the concrete and the geometric properties of each longitudinal girders were calculated. The Fauchart method (1972) was applied using the Ftool software to determine the influence lines of each girder. With the influence lines the was train type was applied as determined by the ABNT NBR 7188 (2013). This way, the maximum shear force and shear strength of each longitudinal girder were determined in the ULS and the results were compared with the LIP TQS software, obtaining good accordance.