An orthotropic plate model for decks of suspension bridges

The main purpose of the present paper is to compare two different kinds approaches in modeling deck a suspension bridge: first approach we look at as rectangular plate and second one beam for vertical deflections rod torsional deformations. Throughout this will refer model corresponding beam-rod model. In our discussion, observe that contains larger number elastic parameters if compared with isotropic For reason supposed be more appropriate describe behavior real bridge. A possible strategy make efficient could relax isotropy condition general orthotropy, which expected increase parameters. new setting, comparison between becomes now possible. Basic results are proved suggested problem, from existence uniqueness solutions spectral properties. We suggest realistic values thus obtaining both similar responses static dynamic deck. This can considered preliminary article since many work has still done perspective formulating models complete bridge take into account not only but also action on it cables hangers. With perspective, section devoted future developments.