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Segurança estrutural de uma ponte ferroviária em concreto armado sobre o rio Mãe Maria
(Universidade Federal do Pará, 2010-12-21) SANTOS, Régis Rivo Ferreira dos; OLIVEIRA, Dênio Ramam Carvalho de; http://lattes.cnpq.br/1324105476558186
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.