Nemetschek Engineering User Contest 2009 • Category 2: CAE Housing & Buildings 43 2 interior walls. Also, the forces of the ‘Guillotine Wall’ had to be taken into account. To calculate the horizontal displacements of the walls and the bending moments of the hybrid floor, the team created a 3D model, offering the most accurate evaluation. The decision to add big box floor lights to the auditorium late in the development process, created additional challenges for the team. Scia Engineer software enabled them to evaluate and adjust their design with minimal disruption to the rest of the space. The roof of the auditorium was designed with steel 3D framework in order to house and maneuver the large 30ton ‘Guillotine Wall’. ARCADIS used the 3D modeling capabilities to make accurate first estimations of the profiles. Displacement Throughout the design process, the team confronted several structural and architectural challenges. The special glasswork used around the building allows little room for movement, only about 3 to 4 mm, between floors. To correctly evaluate this fluctuation, the design team created one model to show the elastic connections between columns and beams, and a second model for the stiff core. Because hinges would be too flabby and movements too overestimated (and to big for the glass) as measured in other analysis tools, the stiff connection was evaluated using the ‘ESASD.02 Raamwerken – star’-module of Scia Engineer and put into another 3D-model. Also the stiff core itself required a more complex design solution, because it doesn’t run up in one movement. A strengthened zone of 10 HEM-550 beams placed close to each other supports the part of the core not running down to the foundation. Other design challenges In addition to the obstacles listed above, the Monovolume faced other design and structural challenges. For example: 1. The auditorium floor and entrance stair were constructed in two phases, requiring the team to reinforce the area with additional concrete to ensure proper connectivity between phases. 2. The concrete delivered for the columns in the parking structure proved to be of lesser quality (fck 25 mpa for a requested C35/45) than anticipated, requiring the team to recalculate the integrity of the structure and reevaluate potential consequences. The use of 3D models enabled precise determination of these acting forces, ensuring more accurate design. 3. The steel columns on the second and third floor, which are HD 400, needed special calculations for their connections to the rest of the structure. For example, the team calculated the stiffness of the provided connection using the esasd.02-module. 4. One of the building’s floor plates ‘hangs’ on the floor plate above it by a single steel tube. To ensure the integrity of the connection, the team created a 3D model in Scia Engineer to provide a more accurate estimation of the acting forces, allowing for more accurate calculations and evaluations. 5. Scia Engineer was also used to calculate the behavior of the featured waffle and mushroom flooring. 6. On the south wall, a double wall is hung onto the two adjacent walls. On these walls, wind loads are acting together with temperature loads and loads coming from the different connected floors. Using a 3D Scia Engineer model with temperature loads, the influence of all these acting loads could be accurately calculated. The Grand Opening At this time (end 2008) the construction work is almost finished as the steel roof structure of the auditorium and the housing of the Guillotine Wall are being installed. Technical installations, inner wooden walls and furniture are arriving and will continue to arrive the first half of 2009. The goal is set to have a Grand Opening in September 2009, at the start of a new academic year. Technical data • Width: 30.5 m • Length: 99.15 m • Height: 24.15 m (roof) – 30.12 m (housing ‘Guillotine Wall’) • Total Floor Area: +- 13.500 m² • Reinforcement: +- 1.200.000kg • Concrete: +- 11.000 m³ • Steel Columns and beams: +- 480.000kg The Monovolume, University of Ghent
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