Nemetschek Engineering User Contest 2009 • Category 2: CAE Housing & Buildings 77 2 Building complex ‘De Kop van Boulevard Zuid’ stretching broad floor slabs as orthotropical slabs, in order to create the most realistic presentation of adhesion. At the cantilevered wall, the adjacent floors function as horizontal draw benches, and are reinforced accordingly. Development and execution One of the more complex aspects of the design is the horizontal deformation of the building. As a result of the cantilever, the vertical load presses eccentrically in comparison with the foundation’s mass centre, which may cause the building to tilt. This effect is strengthened by the presence of the so-called Kedichem clay layer below the foundation pole-bearing sand package. This layer consists of relatively weak clay, which is prone to deform when experiencing high pressure. In order to reduce the building’s total rotation, the façade corbel is cantilevered on both sides during the preliminary construction phase, and vertically kept apart from the adjacent low-rise buildings. This way, the horizontal displacement is reduced tremendously, and during the preliminary construction phase, the wall will shift downwards in an almost straight line. Results that were measured during the construction showed that this approach indeed has the desired effect.
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