Baden House of Farmers in Freiburg, Germany
Customer Project
The new headquarters of the Baden farmers' association (BLHV) is unique. The timber construction is protected by a glass façade to counteract graying caused by weather conditions. Although the architects of the Werkgruppe Lahr have sufficient experience in timber construction, the wooden house with the glass cladding has been a "model project" for them.
| Structural Engineering |
Göppert Civil Engineers, Lahr www.gbi-statik.de |
| Architect |
Work group Lahr, Lahr www.werkgruppe-lahr.de |
| Investor |
Badischer Landwirtschaftlicher Hauptverband (BLHV), Freiburg, Germany www.blhv.de |
Model
The four-story building offers more than 100 workplaces within a 2,000 m² office space.
Structural analysis of the solid timber construction was done by a Dlubal Software customer, the engineering office Göppert Bauingenieure from Lahr, Germany.
Structure
The "Haus der Bauern" in Freiburg has the outer dimensions L x W x H = approximately 55 m x 18 m x 14 m. Inside the building, a staircase core made of reinforced concrete serves as structural stiffening. Apart from that, timber has been almost exclusively used for the supporting structure: The walls, columns and binding girders consist of glued laminated timber, the ceilings of cross‑laminated timber plus an 8 cm concrete layer.
The shear connection between the 20 cm thick wooden ceiling and the concrete is ensured by diagonally inserted FP connectors. From a structural point of view, this hybrid solution has the advantage that the effectiveness of the ceiling panel to transfer horizontal loads is improved. In addition, the concrete good noise insulation.
The exterior wall structure ensures good thermal insulation: 20 cm solid timber wall, 20 cm non-flammable mineral wool and 8 cm laminated spruce as the façade. And at a distance of 14 cm, the glass construction is placed in front.
For this project, costing 8 million Euros, approximately 3,000 m3 spruce wood and 2,000 m3 silver fir were used for the construction.
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Design of a welded truss
This technical article deals with the component and cross-section designs of a welded truss in the ultimate limit state. Furthermore, the deformation analysis in the serviceability limit state is described.
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- I design timber components. The deformations of load combinations deviate from the manual calculation exactly by the factor of the material partial safety factor. Why?
- How can I run the RX‑TIMBER Frame plugin? I did not find it in the Add-on Modules menu nor in Project Navigator - Data.
- I have a question about the results of the serviceability limit state design: How is the increment of the dead load by the factor 1.8 and the imposed load by 1.48 explained in the result combinations for the SLS design?
- Where can I adjust the effective length lef according to Table 6.1 of Eurocode 5 in the TIMBER Pro add-on module?
- Is it possible to display more values for the stress distribution over the layers in RF‑LAMINATE?
- I would expect the results from my load combination (CO) set to a linear analysis to equal the summation of the results from my load cases (LC) also set to a linear analysis. Why do the results not match?
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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
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