Avaliação e inspeção da ponte de concreto armado da Avenida Paulino Rocha em Fortaleza-ce 2017

Abstract

Inspection and evaluation of the state of conservation of a special work of art aims at extending its useful life, as well as the proper functioning and comfort for its users, since they have a daily importance in the life of the people. In this way, the objective of this work was to apply the evaluation criteria described in NBR 9452 (2016) and finite element modeling, in order to analyze the condition of a bridge located at Avenida Paulinho Rocha in Fortaleza-CE. First, there were two visits to the bridge, one of which was to register it, on 04/08/2017, since there was no access to the city's database, about previous inspections and another one, in the day 07/29/2017, in order to follow the evolution of the situation in which the bridge was. In both inspections, it can be said that the state of the bridge did not change because possibly the time interval was considered small to present significant changes. The pathological manifestations were exposed reinforcements in bridgeelements, apparent crushing of the support devices, wear of the concrete face of the bridge and some cracks located in the superstructure and pavement. Based on NBR 9452(2016), the bridge was classified in terms of functionality, structural and durability, with notes 4, 4, 3, respectively. It is worth mentioning that the bridge performs its function, however in this there are several pathological manifestations that are a direct result of absence of monitoring and periodic maintenance, since it exists formore than 30 years and did not collapse during this period. With regard to finite element modeling, two softwares were used to analyze the influence of the support apparatus relative to the internal stresses, simulating two situations: an initial situation, to which the support apparatus operates simply supported, and a current situation of wear of the same, which acts as a crimping, since the neoprene device initially allows rotations and translations and over time loses that capacity. It is important to mention that trains type TB-36 and TB-45 were applied for both situations. When the models for the TB-36 were executed, it was noticed that the shear stress decreased over time between 1.01% and 267.59%. On the other hand, the cutting effort for the same type train reduced in some points of the bridge, but increased in the intermediate pillars and in points close to this one, being this increase from 58.72% to 76.64%. The results for TB-45 also followed the same logic, however the overhead of applying this type train was greater. Finally, it was concluded that the bridge needs a repair in points of its superstructure, in order to improve the durability of the bridge, and replace the supporting appliances or apply a structural reinforcement in the intermediate supports.