Abstract
Spatial helicoid diaphragms as stiffening systems in multi-storey buildings can achieve the following advantages:
increase resistance to horizontal forces. increase stability against buckling.
The development from horizontal diaphragms, which are common these days, through inclined diaphragms, to spatial stiffening diaphragm systems is discussed in the paper. Examples from nature, as shown in the paper provide a basis for further research and development.
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