Estudo comparativo de esforços em uma ponte em vigas múltiplas de concreto protendido

Abstract

This work presents a comparative study of the superstructure of a prestressed concrete road bridge with multiple girders. The study is based on a reference project developed by Stucchi and Skaf (2006), which was adapted and reanalyzed using Csibridge software. The objective was to compare the internal forces obtained through computational modeling with those calculated using the Fauchart method, employed in the reference project. Bending moment and shear force diagrams for permanent loads were determined, as well as envelopes for moving loads, performing combinations Ultimate and Service Limit States. Based on these internal forces, the required active reinforcement area was defined, and the prestress losses were calculated. The results, in summary, indicated higher internal forces compared to those obtained by Stucchi and Skaf (2006) for the maximum moving load case, while showing considerable accuracy for other loads. Furthermore, the final prestressing forces and stresses conformed to the reference values.