Linking Structure and Parametric Geometry

Abstract

The Karamba plug‐in developed by Clemens Preisinger in collaboration with Bollinger + Grohmann Engineers has been developed to predict the behaviour of structures under external loads. Intended to be used by architects rather than being solely confined to an engineering setting, it enables a seamless flow of data between structural and geometric models. Preisinger here describes the program's evolution and application.

Matrix‐Based Shape Sensitivity Analysis for Linear Strain Energy of Triangular Thin Shell Elements

“…As Figure 4 indicates, the maximum vertical displacement computed by our implementation approaches the known value of 0.302 m [20,21] as the mesh resolution is refined. Furthermore, the relationship between mesh fineness and displacement is in good agreement with two commercial software packages (Karamba3D 3.1.50925 [22] and Abaqus 2017 using S3R elements [23]). Our formulation is based on the Kirchhoff-Love plate theory, which neglects transverse shear strains.…”

Physical structural assessment of a segmented concrete shell building floor prototype

“…This value was benchmarked against the stiffness of a flat concrete slab using linear elastic Finite Element Analysis with Karamba3D 32 . An equivalent concrete plate was analyzed with the same statics system, supported at the corners and loaded at the centre; same 4.5 m span; same bending modulus from the material test of 13 GPa, a standard concrete Poisson ratio of 0.15, and a resulting shear modulus G of 5.7 GPa; the thickness was tuned to obtain the same stiffness of 2.0 kN/mm, achieved for a thickness value of 11.5 cm.…”

Computational approach for form-finding optimal design

“…By using the "MeshToShell"-component which takes a triangle or quad mesh and turns it into a group of shell elements Quads get automatically decomposed into triangles, we obtain a shell structure. Shell patches are rigidly connected when some of their nodes have the same index [16]. To define the support system, four closest points are randomly chosen from the defined mesh vertices at each column that connects to the ground.…”