SCIA User Contest 2017 Online Book

72 Category 2: Civil Structures 2 Owner City Alphen aan de Rijn Architect Grontmij N.V. General Contractor Mobilis TBI steel Hollandia Infra BV Engineering Office Ingenieursbureau Stendess N.V. Construction Period 2014 - 2016 The “Koningin Máximabrug” is an energy-neutral modern double bascule bridge (tail bridge) with a bridge opening of 14.2 m. It has 2 x 2 lanes and a cycling/pedestrian lane, which towers above the Oude Rijn. The bridge is moved by means of approx. 400 t of ballast. The larger Oostbrug weighs 280 t and the smaller Westbrug 230 tons. In total, both decks are 35.5 m wide, the Oostbrug is 21 m and the Westbrug 14.5 m. The movable section of the “Koningin Máximabrug” consists of two parallel tail bridges, one of which also has a cycling/pedestrian lane. The so-called tails can be found on both sides of the mechanised bridge sections, with the outer tail being wider than the inner tail. The tails contain the counterweight that ensures the smooth opening and closing of the bridge. The typical feature of a tail bridge is the high position of the hinge above the bridge deck. The high tails give the bridge a unique profile. Firstly, there were the different states of the bridge to be studied. The possibility of creating different states in one model was a big advantage towards calculation. Secondly, there were the curved and continuously changing cross-sections of the tails. The possibility of input and use of a graphical section was a big advantage. Thirdly, special attention was paid to the stability around the opening created in the tails for the connection of the main centre of rotation and hydraulic cylinders. A second order calculation was needed for the check of the tails based on a stability calculation. Also, the dynamic behaviour of the cycling/ pedestrian lane was checked. Ingenieursbureau Stendess N.V. Contact William De Leener 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. Koningin Maxima Bridge - Alphen aan de Rijn, Netherlands