Development of Design Specifications and Commentary for Horizontally Curved Concrete Box-Girder Bridges (2008) / Chapter Skim
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Most states have access to computer programs that can perform such an analysis. Almost all states use AASHTO wheel load distribution.
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At least one state said they ignored torsion design, but this might be because they have only designed large radius bridges. One point of interest is the combination of global shear and regional transverse bending stresses in the webs of curved box-girder bridges.
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. Although curved box-girders are not specifically addressed in these codes, many of the analysis techniques identified for box-girders, such as the orthotropic plate analogy and the grillage analogy methods may be applicable to curved structures.
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design codes. Curved beams are not covered directly, although there is a section on torsion, but only with general instructions found in most textbooks.
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A recent problem with two box-girder bridges in Coahuila, Mexico, that is apparently due to the curvature of the structures has developed. These bridges, which are relatively new, are cast-in-place, post-tensioned, continuous concrete box-girder bridges supported on single bearings at each non-integral single column.
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