Woodcube Residential Building in Hamburg, Germany
The 5-story residential building with an impressive ecological balance had the opportunity to be presented at the International Building Exhibition (IBA) in Hamburg, Germany. Being CO2-neutral in both its production and operation, the Woodcube's energy level corresponds approximately to the one of a passive house. Any material used in the timber cube is completely recyclable and biodegradable. The customer of Dlubal Software, Isenmann Ingenieure from Haslach was in charge of the structural planning. The calculation and design of the access core and the pile foundation made of reinforced concrete was performed in RFEM.
Isenmann Ingenieure, Haslach, Germany
Ing. Erwin Thoma Holz GmbH
Thoma Forschungszentrum für Holzverarbeitung
Architekturagentur, Stuttgart, Germany
Woodcube Hamburg GmbH
DeepGreen Development, Hamburg, Germany
Length: ~ 16 m | Width: ~ 16 m | Height: ~ 32 m
Nodes: 232 | Members: 39 | Surfaces: 51 | Finite Elements: 5033
Timber and Reinforced Concrete StructureWhat is really revolutionary is the fact that the timber core of the building including ceilings and floors consists of completely untreated wood remaining visible in the outdoor as well as the indoor area.
The Woodcube is composed of prefabricated wall, floor and roof elements consisting of timber. Due to the high degree of pre-fabrication, the wooden shell has been completed within four weeks. It is placed upon the basement and built around the central access core with the staircase and the elevator, both made of reinforced concrete.
The basement rests on a total of 22 full displacement bored piles of Ø 51 cm which are inserted 13 m deep into the ground. The load applied on each pile head is up to 1,000 kN. In order to transfer the loading in an optimal way, a circumferential pile head beam is arranged below the external walls.
The basement is made of waterproof concrete. All in all the external walls of the wooden cube have a thickness of 32 cm including a layer of t = 3 cm for thermal insulation consisting of softboards. The façade is based on a ventilated coating made of untreated larch wood.
The loads are transferred by the external walls and the walls of the central access core. Thus, no further columns or load‑bearing interior walls are needed. This in turn allows for an individual room layout.
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Since wind on laterally open structures is not addressed in the Eurocode, the 4 cases of the German DIN 1055 Part 4 are referenced.
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows softening of the material, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with in-plane loads.
Which units are specified in the result display of the support reactions (kN or kN/m)? A note about this is missing in the graphic.
In the case that the support reactions are given in kN/m, for which distance does the value apply?
Is it possible to specify shrinkage effects as loads?
- Where do I find the setting to specify the entered structural component as a "wall" or "slab"?
- The four plates, identically loaded, show different negative moments at the point of support. Is this a mistake?
- The protocol lacks information on the limit time for the assessment of fire resistance R in the RF-TIMBER Pro add-on module. Can this information be added to the report?
- How can I model a timber-concrete composite floor?
- How is the static depth d calculated in the bending design of block foundations (calculation as equivalent beams)?
- Is it possible to set parameters for shrinkage and creep calculation in RF-CONCRETE Members?
- I would like to convert the load from a surface load to a line load, that is, to apply it to the individual beams. How can I do this without using an auxiliary area?
- I have defined temperature loads, strain loads, or a precamber. As soon as I modify stiffnesses, the deformations are no longer plausible.
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
Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)