Züblin AG were achieved as curved trains with up to three arcs and polygons. In this way, bending forms coordinated with Ed. This could be solved by means of specially developed scripts, which were used for parameterized simplification and grouping of bar shapes. Since these tracks consisted of splines and could therefore not have been produced economically, the geometry had to be simplified in a first step. Thirdly, the accuracy in the manufacture of the complex bending shapes of the reinforcing bars was limited.īased on these boundary conditions, Werner Sobek‘s engineers created socalled tracks (reinforcement axes) with Rhinoceros in combination with Grasshopper and C# for the reinforcement of the free-form geometry using the 3D model next to the surface.
Secondly, high demands on the visible surface required small deviations in the concrete cover and extremely precise bending forms. The reinforcement design proved to be very complex due to three boundary conditions: Firstly, the geometry with constantly varying component thicknesses, synclastic and anticlastic curved areas as well as a combination of circular and orthogonal reinforcement systems led to complex transition and overlapping areas with multiple crankings and bends.
It served as a basis for the object planning of ingenhoven architects, the shell and reinforcement planning of Werner Sobek AG as well as for the development of the formwork construction by ZÜBLIN. In addition to the pure surface geometry, the model also contains further information such as formlining joints and the coordinates of installation parts. In collaboration with Werner Sobek AG, ingenhoven architects generated a 3D model in Rhinoceros. It is supported by 28 chalice-shaped columns, which can be divided into 23 standard columns with edge-reinforcing cover (scoop) on the upper side, four flat columns without edge-reinforcement and a larger special column, which opens as an access area to the city centre.ĭue to its enormous geometric complexity, the shell roof had to be planned completely in 3D. Despite all apparent freedom, however, this shape is by no means arbitrary, but rather follows the course of forces in a highly efficient manner and implements the requirements of a wide-span and light-flooded station concourse in a material-optimized way. The associated shell roof - a highly complex structure of anticlastic curved surfaces - can be mathematically described as free-form, since there are no mathematical regularities that describe it. The station hall for the new underground through-station in Stuttgart is to be approximately 420 metres long and 80 metres wide. A prime example of a digital workflow in construction. Züblin AG is now fully exploiting the advantages of BIM during implementation thanks to Allplan Bimplus. On the basis of this 3D planning, the company Ed. The engineering firm Werner Sobek AG, which was responsible for the structural, shell and reinforcement design of the underground through-station concourse, therefore relied largely on 3D for the design.
#Allplan ingenieurbau software#
Without the use of powerful BIM software and production processes specially developed for the project, the implementation of the building would be impossible. Special attention will be paid to the station concourse of the new underground through-station in Stuttgart, designed by ingenhoven architects.Īn architecturally highly sophisticated shell roof, supported by 28 geometrically highly complex chalice-shaped columns, qualifies this as a masterpiece of modern architecture that the world has never seen before.
In addition, engineering history is being written here, both in terms of design and technology. But it‘s not just the size that makes this project so impressive. Within the whole project, five new stations, about 120 kilometers of new railways and two new quarters are being built. Stuttgart 21 as a part of the Stuttgart-Ulm rail project is one of the largest European infrastructure projects.