Abstract
The paper deals with some aspects of the design and the construction of composite bridges, especially curved bridges, built lately in Switzerland. Firstly problems related to the stiffening of girder webs are considered; actual trends lead to longitudinally unstiffened webs with a reduced number of transverse stiffeners. The two possible arrangements for two-girder curved bridges, i.e. open framing and closed framing, are compared and some peculiarities of the analysis, both rigorous methods and approximate approaches, are mentioned and the corresponding limits of application are underlined. Finally the influence of a longitudinal slope and of temperature movements for curved bridges are presented.
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