Evaluation of pathological manifestations in reinforced concrete bridges in the city of Juiz de Fora-MG

Abstract

Bridges and viaducts are relevant structures that can produce a significant impact on improving traffic flow in urban areas, being considered special constructions. However, like any other structure exposed to weather conditions and aggressive agents, they are susceptible to the occurrence of pathological manifestations, with a high incidence commonly observed in reinforced concrete bridges and viaducts, often associated with heavy vehicle traffic and the lack of maintenance and preservation of the structure. In this context, the objective of this work is to detect, through visual analysis, the main pathological manifestations present in reinforced concrete bridges located in the city of Juiz de Fora, Minas Gerais. A case study is carried out, analyzing three bridges located within the urban perimeter over the Paraibuna River, namely: Engenheiro Daniel Alberto Rigoli Botta Bridge, Pedro Marques Bridge, and Élson Duarte (Raposa) Bridge. The pathological manifestations are identified, quantified, and their origins are investigated, as well as their impact on structural performance and safety is evaluated. Based on this analysis, recovery actions are proposed for these structures. The most recurrent pathological manifestations are cracks, leaching, concrete disintegration, and reinforcement corrosion, with the main cause being the absence of corrective maintenance. For all of them, recovery methods are presented aiming at the repair and durability of the structure. It is observed through this research that prevention, through inspection and maintenance, is essential to avoid structural damage, reduce repair costs, and ensure the durability of special constructions and the continuous flow of urban mobility.