I have to evaluate the feasibility of a structure in compressed earth bricks somehow like this; base diameter about 3m and 4 to 8m tall. This might be realized in Geneva in June. As we should be able to enter it, it must be structurally safe. For now we are considering working with bricks made by http://www.terrabloc.ch/, a swiss manufacturer of compressed earth bricks.
I saw this project on-line, kind of similar although not the same material.
in Karamba3D you could calculate the structure as a shell with an orthotropic material. In the current WIP version of Karamba3D (see www.karamba3d.com/nightly-builds) it is possible to define materials with different strength values in tension and compression and different yield criteria.
One could either use the cross section optimizer to look for the minimum wall thickness or use a uniform wall thickness and optimize the geometry towards a given maximum value of utilization.
Dear @karamba3d / Clemens,
Thank you very much for your kind reply. Your second option “uniform wall thickness and optimization” seems to be the perfect way to reach my goal. Any advice on a tutorial I could follow to get acquainted with Karamba in that specific field (shell optimization)?
you could have a look at the manual regarding cross section optimization for shells.
One possible approach would be to take the control points of your surface and change them using e.g. Galapagos so that under given loads a sucture with minimum mass results.