Análise das manifestações patológicas em pontes de concreto armado: estudo de caso

Abstract

The existence of several reinforced concrete bridges with pathological manifestations which usually pass unnoticed by users, due to the difficult visibility of its structural system, motivated this research. The bridges have a high importance in the system of economic development, enabling the access of goods, aiding tourism and providing offsets. This work has as objective the study of pathological manifestations found in four reinforced concrete bridges located between KM62 and KM82 of BR 423 highway, near Delmiro Gouveia, in the hinterland of Alagoas. Inspections were carried out "in loco" on the bridges over the streams: Salgadinho, Moreira, Taboleiro and Mosquita, based on the IPR of 709 2004 manual (Manual de Inspeção de Pontes Rodoviárias), assigning 1 to 5 for technical grades on the work. Inspections, in addition to identifying the main pathological manifestations pointed their possible causes. All bridges analyzed showed several pathological manifestations, with an emphasis on corrosion and efflorescence, affecting mainly the longitudinal and transverse frames of structures. It was evident through the present research, that the bridges analyzeded need maintenance to have a longer useful life.