101 Bicyclist and pedestrian bridge “Het Domein” Project: Bicyclist and pedestrian bridge “Het Domein” Type: Cable stayed mixed concrete-steel bridge Location: Houten (Utrecht), The Netherlands Construction firm: Welling Architect: Grontmij N.V. Engineering office: Ingenieursbureau STENDESS N.V., Lovendegem, Belgium Contractor: S3C/ Zuid Nederlandse constructie en apparatenbouw, Heyningen, The Netherlands Total steel weight: ± 65 tons Total length: 50 m Building period: 2005 Short description of the project Because of the growing number of inhabitants, the village of Houten there was, the need to create new living areas. For this reason several suburbs were built in the form of leafs around the centre of Houten. These suburbs are separated by water. To guarantee an easy access between these suburbs a ‘bicycle and pedestrian bridge’ was needed. The bridge can be described as a cable stayed mixed concrete-steel bridge. Circular transverse beams connected to an asymmetrical pylon by cables support a mixed concrete-steel bridge deck. The bridge deck is curved. The asymmetrical pylon and the curved shape of the deck give, in combination with cables, a dynamic character to the bridge. The asymmetrical pylon represents the “gate” to the suburbs. Use of ESA-Prima Win Description of technical questions to be solved with ESA-Prima Win. Both for the dimensioning of the bridge in the traffic situation as well as for the erection engineering of the bridge, ESA-Prima Win was used. From the point of view of engineering this project was very challenging. First, there was the fact that the bridge deck was mixed concrete-steel. This implied a deck calculation in several stages with different stiffness factors and the calculation of cracked-uncracked concrete. The possibility of calculating mixed sections and the use of graphical sections by ESA-Prima Win was a big advantage. Secondly, there was the limitation of the reactions on the bridge end supports. Also here ESA-Prima Win proved its possibilities. Thirdly, there was the simulation of the realistic behaviour of the cables. The cables were simulated as classic bars, but with the Emodules of the tension bar material in relation to the inclination of the tension bars they were considered as cables with a fictive Emodulus. Because the linear calculations resulted in compression in the tension bars a non-linear calculation was needed. In the fourth place, it was necessary to perform a second order calculation for the check of asymmetrical pylons based on a stability calculation. Fifthly, for the erection engineering the different construction stages had to be examined and a severe erection manual for the mounting of the cables was needed. This was necessary to achieve the theoretical form of the bridge deck. And last but not least, the dynamic behaviour of the bridge had to be checked. Description of how our experience with ESA-Prima Win proved its completeness • Dimensioning a 3D structure consisting of different materials (steel, concrete) • The possibility of using and combining the results of ESA-Prima Win in a flexible way. • The possibility of calculating mixed concrete-steel sections. • The possibility of calculating graphical sections. • The possibility of using tension only elements for the modelling of the cables. • Stability calculation and second order calculations. • Checking the dynamic behaviour of the structure by calculating the ownvalues of the structure. This project proves the great diversity of ESA-Prima Win in checking the structure and the use of materials. Used modules: • Base • 3D frame • Dynamics • Steel code check (NEN) • Stability • Physical non linear conditions Bicyclist and pedestrian bridge Because of the growing number of inhabitants in the village of Houten there was the need to create new living areas. For this reason several suburbs were built in the form of leafs around the centre of Houten. These suburbs are separated by water. To guarantee an easy access between these suburbs a ‘bicycle and pedestrian bridge’ was needed. The bridge can be described as a cable stayed mixed concrete-steel bridge. Circular transverse beams connected to an asymmetrical pylon by cables support a mixed concrete-steel bridge deck. The bridge deck is curved. The asymmetrical pylon and the curved shape of the deck give, in combination with cables, a dynamic character to the bridge. The asymmetrical pylon represents the “gate” to the suburbs.
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