Baden House of Farmers in Freiburg, Germany
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.
Göppert Civil Engineers, Lahr
Work group Lahr, Lahr
Badischer Landwirtschaftlicher Hauptverband (BLHV), Freiburg, Germany
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.
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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For designing glass in the RF‑GLASS add‑on module, you can use one of two calculation methods: a 2D or a 3D calculation. The main difference of these design options is the automatic modeling of the layers in a temporary model. In a 2D calculation, each layer is generated as a surface element (plate theory), in a 3D calculation as a solid. Depending on the selected layer composition, you can either select an option or will find it preselected by the program.
RF-/DYNAM Pro - Natural Vibrations Add-on Module for RFEM/RSTAB | Determination of natural frequencies and mode shapes
RFEM/RSTAB add-on module RF-/JOINTS Timber-Timber to Timber | Design of direct timber connections according to Eurocode 5
RF-/DYNAM Pro-Natural Vibrations Add-on Module for RFEM/RSTAB | Determination of Natural Frequencies and Mode Shapes
RFEM/RSTAB add-on module RF-/TIMBER SANS | Design of members made of timber according to SANS 10163 (South African standard)
The cross-section resistance design analyzes tension and compression along the grain, bending, bending and tension/compression as well as the strength in shear due to shear force.
The design of structural components at risk of buckling or lateral-torsional buckling is performed according to the Equivalent Member Method and considers the systematic axial compression, bending with and without compressive force as well as bending and tension. Deflection of inner spans and cantilevers is compared to the maximal allowable deflection.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads.
Design-relevant parameters such as the stability analysis type, member slendernesses, and limit deflections can be freely adjusted.
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- Is it possible to set user-defined values when viewing solid stress results?
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- How can I create a curved or arched section?
- Is it possible to design the support pressure or the compression perpendicular to the grain in RX‑TIMBER?
- After the design with RF‑/TIMBER Pro, I optimized a cross-section. Why is the utilization of the optimized cross-section exceeded now?
Programs Used for Structural Analysis
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