Rainforest Biome of Eden Project in Cornwall, United Kingdom
The Eden Project in Cornwall, United Kingdom is a complex of two huge biome buildings consisting of several domes and outdoor gardens. Inside the biomes, there are several thousand species of plants collected from many diverse climates and environments, which serve for biological studies and exhibitions. The Rainforest Biome was built in the second phase of The Eden Project’s development. It is kept at a tropical temperature and moisture level and covers over 1,000 varieties of tropical plants.
MERO-TSK International GmbH & Co. KG, Würzburg, Germany
London, United Kingdom
Sir Robert McAlpine Ltd
Eden Project Ltd
The original vision for the project belonged to anthropologist and archaeologist Tim Smit.
The architectural design was done by Nicholas Grimshaw and Partners from London, after preliminary structural design by MERO.
The biome structure is a hex‑tri‑hex space frame with two layers. The frame structure consists of steel tube segments that were connected using bolted joints.
The external cladding panels are hexagonal and pentagonal in shape and consist of inflated membrane cushions made of three layers of ETFE foil, which maximize the ultraviolet light from the sunlight needed by the plants. Thus, it is possible to simulate the environment for the tropical plants very well.
The structure was created in CAD and imported into RSTAB structural engineering software.
The load cases and result combinations comply with the British standard BS 5950. A calculation according to the second-order analysis was carried out.
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The effects due to snow load are described in the American standard ASCE/SEI 7-16 and in Eurocode 1, Parts 1 through 3. These standards are implemented in the new RFEM 6 program and the Snow Load Wizard, which serves to facilitate the application of snow loads. In addition to this, the most recent generation of the program allows the construction site to be specified on a digital map, thus allowing the snow load zone to be imported automatically. These data are, in turn, used by the Load Wizard to simulate the effects due to the snow load.
For the components of the joint, you can check whether stability failure is relevant (add-on structural stability for RFEM 6/RSTAB 9 required).
The critical load factor for all analyzed load combinations and the selected number of mode shapes is calculated for the connection model. The smallest critical load factor is compared with the limit value 15 from the standard EN 1993-1-1, clause 5. In addition, a user-defined adjustment of the limit value is possible. Furthermore, the corresponding mode shapes are displayed graphically as the result of the stability analysis.
For the stability analysis, an adapted surface model is used to specifically recognize the local buckling shapes. The model of the stability analysis, including the results, can also be saved and used as a separate model file.
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Programs Used for Structural Analysis
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions
Stress analysis of steel members