Bras de la Plaine Bridge, Reunion Island
Dr. Manabu Ito, President of the International Association for Bridge and Structural Engineering (IABSE) presented, the 2003 IABSE Outstanding Structure Awards to the 'Bras de la Plaine Bridge, Reunion Island' and the 'Bibliotheca Alexandrina, Alexandria, Egypt' on August 27, 2003. The Award Presentation took place during the Opening of the IABSE Symposium 'Structures for High-Speed Railway Transportation', Antwerp, Belgium.
The Award recognises the most remarkable, innovative, creative or otherwise stimulating structures completed within the last few years. It consists of a Diploma each for the Structural Engineer, the Architect, the Contractor, and the Owner, as well as a plaque to be fixed to the winning structure, at a special ceremony.
The Bras de la Plaine Bridge, Reunion Island receives the Outstanding Structure Award for being an 'an elegant slender single span composite truss bridge with innovative construction details'.
The topography is suitable for a 280-m-long single-span, arch, bridge. The deck is a prestressed, composite, variable height (17,60m to 4,00m) truss structure, embedded in two counterweight abutments. Its characteristics comprises: a deck with longitudinal prestressing, a Warren-type steel truss structure with two planes of steel tubes in triangular layout, the diagonals being circular tubes; a lower slab, of variable width and thickness, with a parabolic profile interrupted at the key.