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|The fabrication is driven by the structure's 3D
model, which is generated from a network of curves that is based on
architectural as well as structural inputs. From the model, unrolled
cutting patterns for each sheet are extracted, which are then cut
using computer-controlled (laser)cutting. Since the steel sheets are
all constant cylindrically or constant conically curved, they can be
produced with conventional rolling equipment.
|Cutting patterns for the
curved sides nested on a steel plate for laser cutting, by Corus
The rib-sides are then
brought together, positioned through tack welds and eventually welded. The
welding can be done in conventional steel workshops, yet a robot following
the edge of a plate is an option too. The components are pre-fabricated
off-site as Y-shaped or larger transportable parts. On the building site,
the components are assembled through bolted connections only.
||Construction of a
Fabrication and assembly of the ribs was succesfully tested by
three prototypes. After completion the geometry of the prototypes was
measured with a total station. Results showed that dimensions of the ribs
themselves are highly accurate, while care should be given to the correct
positioning when connecting ribs to each other. The prototypes have been
built in collaboration with, and were sponsored by Corus, Kersten Europe and Delft University of Technology.
Copyright 2011 Martijn Veltkamp, MoreThanStructures. All
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