The study of the behavior of highway bridges has been, taking great prominence in the experimental area, because often there is a need for an increase of these mobile charges. The Company Vale, is worth form an agreement mad with the UFPA, sought to conduct studies of the resistant capacity of
railway bridges that make up the Carajás raiboad, which passed to future shipments wich passed from
32 tf to 40 tf, causing considerable changes in the behavior of the structure a lack of maintenance or a
maintenance of irregular reinforced concrete bridges can result pathological manifestations that can
compromise safety and the risk of intervention by runoff. About the abeady discussed is the bridge over
the river boiler located in the city of Marabá in the state of Pará, bridging the river identified as Mãe
Maria 50A OAE, has a rectilinear path bacuted reinforced concrete cast in place consists of two spans
hyperstatic totaling 64,20 m transposing the riverbeat in two spans of 20 m and cross section width of
5,85 m offering. It has become essential to assess their physical an monitoring with resistance electric
gauges (slab, longitudinal beam, foundation blocks and piles, and encounters) that make up structure
during the passage of trains carrying in addition to monitoring were performed as surface hardness by
esclerometry and the estimation of the armature coating and the same location through pacometry,
destructive tests such as extraction of test specimens to determine the tensile resistance and modulus of
elasticity of concrete and the resistance to penetration testing through the carbonation of the inherent
question of durability of the same to be compared with memory and calculation with three dimensional
computer models developed via commercial software SAP2000® (Computers and Structures) the uses
finite element method (MEF). The MEF was used to obtain the efforts enabling security checks
according to standard recommendations, these comparisons are presented and discussed for the
completion of the behavior of the stringers, knowing the precise structural capacity of the bridge and
it’s useful life, you can ensure traffic compositions with greater safety.
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