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 plants of several thousands species collected from many diverse climates and environments which serves 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 of the project came from the 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 together by using bolted joints.
The external cladding panels have the hexagonal and pentagonal shape and consist of inflated membrane cushions made of three layers of ETFE foil which maximize the ultraviolet from the sunlight needed by the plants. Thus, it is possible to simulate the environment for the tropical plants well.
The structure was created in CAD and imported into the structural engineering software RSTAB.
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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SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
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