3.1.02. fingerprint tool
Date published: December 19, 2022
This script allows the user to select a pre-designed model and evaluate whether or not it can be built from a particular section and species of bamboo. The script checks if the initial strain from bending doesn’t surpass the limits of what the material can take. For this, it bases itself on the principle that the relationship between the stress in a culm is directly linked to the section depth and the overall curvature of the deflected beam.
In the Input Data section, users are required to assign designed model axis geometry to specific layers according to their envisioned culm diameter, which is to be specified. Then, the bamboo species with its specific maximum stress and elasticity modulus needs to be specified or selected.
A two-dimensional graph will display the “fingerprint” of the pavilion, which is specified as the distribution of culms per their minimum bending radius (or maximum curvature). Points that fall below the diagonal specified by the bamboo species would result in an initial strain beyond what the chosen bamboo material and section can tolerate and need to be shifted to a layer with a smaller diameter. The sticks that need to change are visualised in red in the 3D model.
This exercise is using Grasshopper version 1.0.0007