Longspan Bridges with Double Composite Action

by Reiner Saul, Andrae und Partner GmbH, Stuttgart, Germany,

Document Type: Proceeding Paper

Part of: Composite Construction in Steel and Concrete II


Continuous steel composite bridges with double composite action have, besides the concrete roadway slab, a concrete bottom chord at the haunches over the main piers. This concrete bottom chord increases the stiffness and reduces the construction cost. The advantages of this system are highlighted exemplary at three bridges with main spans up to 213,75 m (700'). Furthermore, prestressing versus reinforcing of the roadway slab at the piers is discussed and an innovative and economic shear connector presented.

Subject Headings: Composite bridges | Steel bridges | Concrete bridges | Continuous bridges | Concrete slabs | Reinforced concrete | Composite structures | Bridge design

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