Influência dos estados limites último e de serviço no dimensionamento de pontes e viadutos mistos de aço e concreto em seção caixão
Abstract
Composite of steel and concrete bridges and viaducts, especially those with box sections, have several advantages. But there is a wide discrepancy in the recommendations provided by the standards for verifying service limit states on bridges and viaducts. The present work summarizes the limit deflections established by the main standards and existing in the literature, and evaluates the influence of the ultimate and service limit states for the design of coffin section bridges. For this, it dimensioned 11 bridges and the influence of the ultimate and service limit states on their design was investigated. It was found that the loading that causes the plasticization of the composite section produces deflections considerably higher than those established by the standards. Although the deflection limit recommended by normalizations does not consider the effect of vibrations on the structure, it is found that the recommended limits are very severe and therefore further studies are needed to check existing criteria and others proposed, if necessary
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References
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