Experimental geodesic dome with a sandwich panels structure

The popularization of geodesic domes as a living space was one of R. B. Fuller's challenges for modern mankind. The search for a technology that can optimally satisfy this desire in a society living in a temperate climate has become the goal of the structural studies described in this study. The technological solution for the layer of sandwich panels depends on the adopted discrete division of the polyhedron surface. Due to the relatively simple shape of this element, the dodecahedron was adopted as the basis form. The designated triangular elements constitute the initial shape of the basic element. The shape of the spatial solid of this element has been obtained as the result of the analysis of the edges of connections between triangular panels. The use of thin GRC concrete slabs in the load-bearing layers allows it to work with metal edges around the perimeter of the panel. The design solutions for the geometry of the structure nodes are of decisive importance for the technology of assembling the panels into a compact arrangement of the spherical shell. In order to assess the technical value of the created model, an original measurement system was designed based on statically operating measurement poles. The system of mechanically adjustable measuring poles has two functions in the same position: as the adjustable load that causes deformation, and as the protection of the model in case of loss of stability during strength tests. The research experience obtained on the initial model will be used in further detailed testing of the sandwich panel roofing system described below.