96 Category 2: Civil Structures 2 Swing Bridge Simpson Bay - St-Maarten, Caribbean SE Owner Simpson Bay Lagoon Authority Corporation Architect Hollandia Infra BV General Contractor Volker Construction International Engineering Office Ingenieursbureau Stendess N.V. Construction Period 01/2013 - 12/2013 The St-Maarten swing bridge is a part of the 726 m long Causeway road bridge crossing the Simpson Bay in the Caribbean. This bridge was built to improve access to the airport and Cole Bay. The steel swing cable bridge has a span of 68 m, a width of 12.2 m and a weight of 450 tons. The bridge has two 35 m high pylons. The pivot point is in the centre of the bridge. The bridge was completely built up in the Hollandia Infra workshop in the Netherlands and shipped to the Caribbean. Determining the pretension in the stays was an important aspect in the design of the bridge. This force had to be determined for the different positions of the bridge. When the bridge was in the closed position, there was always a minimal pressure necessary at the end bearings, although in this position the deformation of the stays had to be limited by realizing a minimal pretension force in the stays. In the open position, the force in the last stays becomes a determinant and a check of the strength of the stays was necessary. The interaction between the above mentioned phenomena determined the position, type and pretension force of the stays. A second order calculation was needed for the check of the pylon based on a stability calculation. For the erection engineering, the different construction stages had to be examined. The dynamic behaviour of the bridge also needed to be checked. Ingenieursbureau Stendess N V Contact Jan Braeckman Address Grote Baan 18 9920 Lovendegem, Belgium Website www.stendess.com Stendess calculates and draws complex steel constructions in a high quality and efficient manner while seeking economically responsible and substantial solutions for specific technical stability issues. Thanks to the integral service, where the design of the metal superstructure and the concrete substructure are calculated and drawn by experts in the same office, the building owner and principal contractor retain 100% control over the complete structure. References demonstrate the multidisciplinary knowledge and ability of our engineers and designers in the market of bridges, industry, utility and other projects located worldwide.
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