Integration of BIM and Generative Design for Earthbag Projects

Abstract

Although earthbag construction is recognizably a low environmental impact solution, existing software tools are limiting factors, since they do not have enough technical data to support its building information model. We propose a visual programming language code to generate earthbag domes inserted in a BIM environment, where these structures can be associated with other design and structural elements, producing the required technical data to inform construction including technical specifications as well as material and task quantification. This research adopted an experimental methodology exploring the advantages of the combination of Building Information modelling with parametric generative design in of the design of earthbag buildings or hybrid constructions involving earthbag walls of different geometries. It was validated resorting to a simulation process where it was possible to redesign and 3D print a scaled model of an existing earthbag building that merges different shapes in the same building, including the automated generation of the associated technical data. The developed tool allows designing different types of earthbag buildings providing a typical BIM model including both geometric model and technical specifications.