Nemetschek Engineering User Contest 2009 • Category 2: CAE Housing & Buildings 83 2 is constructed by using hollow core slabs with an in situ layer, while metal decking is used in the roof floor. Both floors serve as a panel, which is crucial to the construction’s stability. First, a three-dimensional wire-frame model was drawn, within the architectural boundary conditions, according to our well-developed engineering instinct. Then, this model was transferred to the 3D computational model of ESA-Prima Win, after which the various steel sections were determined. This was all done within the architect’s set conditions; because of the cohesion of the different slopes, this was an imperative requirement. Wherever possible, trusses were implemented in order to reduce the weight. However, this could not be achieved in all places, which required the appliance of heavy steel sections; for instance, an HD-section was used for the diagonal floor beams. After adjusting the 3D-drawings to the final ESA-Prima Win profile measures, the architect implemented these to her drawings, and adjusted them wherever necessary. Development and execution During the execution phase, steel sub-contractor Moeskops used IMd’s 3D-drawing model to design the details. After thorough consultation, IMd adjusted a few elements, with regard to the production- and assembling time. Transport by water enabled the steel construction to be divided into large units. We were therefore able to get the largest truss, measuring 22 meters in length and 7 meters in height, to be delivered as a prefab unit. In only one week’s time, the complexshaped steel construction could be assembled. Prestressed façade While execution on site took an advance with placing the foundation piles, it was decided to enclose the atrium surrounding the lecture hall with an experimental façade. The design goal of this 12-metre high cladding is to administer it without visible reinforcements, and create a super-slender appearance. The lecture hall design was again analysed with the use of Scia’s ESAPrima Win, allowing for the substantial vertical tensile force which is supported by the upper edge of the lecture hall’s two large trusses. This resulted, among other things, in applying heavier steel sections, and a single extra column. Despite the inconvenient time of the adjustment, it was nonetheless executed properly by all parties in design and execution. Therefore, the planned delivery date of July 2009 is still within reach. Sculpturally shaped lecture hall
RkJQdWJsaXNoZXIy MTgyMDE=