Nemetschek Engineering User Contest 2009 • Category 2: CAE Housing & Buildings 31 2 deformations for the manufacturing of the frames of the glazed facades. In the final solution the horizontal stiffness is granted by a large ‘framework’ which is formed by 3 columns at the street side of the building and the core at the other side. Due to the large horizontal displacements, it was necessary to introduce several construction stages where the supports of the formwork where removed in order to let the building move under its self-weigh. In this way, the large horizontal displacements at the end of the construction were limited and the displacements were introduced in a more controlled way. Several models were made to analyse the internal forces between different construction stages. The evaluation of displacements measured on site and the values from the models were satisfying. The reinforcement of the shells was optimised to an economic minimum and was transformed in prefabricated cages which were easy to place and shortened the construction time. In order to avoid beams, the reinforcement of the slabs was carefully analysed and optimised. Supplementary reinforcement was necessary to prevent punching around the mixed columns. The use of Scia Engineer for this project The program Scia Engineer made it possible to easily and quickly model and analyse several solutions. Because of this, it was possible to, in early designing phases, make essential decisions in consideration with the architect, which resulted in an esthetical, structural and economical justified solution. The program Scia Engineer made it possible to easily and quickly visualise the internal forces in the shells and thereby the interpretation of the results was simplified. Also the modelling of the shells themselves was very easy and intuitive. The program Scia Engineer made it possible to analyse the initial and final deformations in function of the real geometry, age of the concrete and theoretical necessary reinforcement. This was of great importance for the frames of the glazed facades. Office Building ‘Facelift Umicore’, Hoboken
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