School Building on Campus Lorenzo in Leipzig, Germany
Customer Project
The 7-story building, with 5,300 m² of floor space, is used as a vocational school. The dimensions (length x width x height) are approximately 46.0 m x 20.0 m x 21.8 m.
| Client, Designer |
basis|d GmbH Wehlener Straße 31 01279 Dresden, Germany www.basisd.de |
| Structural Design |
Eggers Tragwerksplanung GmbH Scheunenhofstraße 2 01097 Dresden, Germany www.eggers-tragwerksplanung.de |
Model Parameters
Model
The building was built as a solid structure. The building envelope and the main supporting elements (foundation slab, ceilings, walls, columns, downstand beams, etc.) consist of reinforced concrete using the cast-in-place concrete construction method. The roof structure was designed as a purlin roof.
The building's façade above the ground floor has an inward offset, resulting in a floor area of approximately 46.0 x 17.2 m. The ground floor, as well as the first and second floors, have different irregular floor plans and no continuous supporting structure. The third and fourth floors have regular floor plans; the façade of the fifth floor has another offset, built as a stacked story.
Structure and Structural Design
The structural analysis was carried out using a 3D model in RFEM, as this program provided the best results for the building's complex structure, including skew columns, irregular floor plans, and the façade's multiple offsets.
The large slab spans and the 5-story façade, which is supported by irregular, skew columns, represented the greatest challenges in this project. Loads were partially carried upwards over two floors by means of tension elements, as a direct load transfer to the structural components below was impossible. The wooden roof structure was modeled to determine the loading for the solid structure.
Project Location
Riebeckstraße 37-41Keywords
School Reinforced concrete Concrete structures
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New
How to Work Effectively with the Building Model Add-on in RFEM 6
Building Model is one of the special solution add-ons in RFEM 6. It is an advantageous tool for modeling with which building stories can be created and manipulated easily. Building Model can be activated at the beginning of the modelling process and afterwards.
Increased Calculation Performance by Reducing the Nodal Degrees of Freedom
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (e.g. trusses and membrane structures).
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