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The steel design for the new railway bridge over the River Sado in Portugal

2010; Wiley; Volume: 3; Issue: 4 Linguagem: Inglês

10.1002/stco.201010033

1867-0539

António J. Reis, Jean Marie Cremer, Alain Lothaire, Nuno Lopes,

Structural Engineering and Vibration Analysis

Abstract The new railway crossing over the River Sado at Alcacer do Sal in Portugal required a 2.7 km long bridge, comprising two approach viaducts and a main bridge. Steel‐concrete composite decks were adopted, the approach viaducts having plate girder decks with 45 and 37.5 m spans, and the main bridge three spans of 160 m each with a box girder deck. The main bridge, with a continuous deck over 480 m, consists of three continuous bowstrings with a single plane of hangers on the bridge axis. The main aspects of the bridge concept design are described and the steel design in particular is discussed.