Computationally Modeling Standard Space Frames and Origami Inspired Frames: A Comparative Analysis

Abstract

Space structures, including space frames or space trusses depending on the type of connections, are a three-dimensional structure made of interconnected members that are often used for roof supporting systems. These structures can distribute loads in three dimensions and support wide spans without the need for many intermediate supports. Deployable structures are systems that can be folded for easy disassembly and transportation, and then can be simply “deployed” for their desired purpose. A space structure inspired by the geometry of the Miura-Ori origami fold, referred to as the origami frame or truss, was computationally modeled. This was done to create a space structure system that has inherent folding ability, allowing for a wide range of future applications as a deployable structure. This study aimed to compare a standard space truss with the origami truss by evaluating the structural performance of both trusses in terms of geometrical properties, load capacity, and deflection. The goal of this study was to conclude if the origami truss was feasible as compared to the standard space truss, in order to allow for future studies into its fabrication, specifically noting its advantage of deployability. The origami truss was found to have both advantages and disadvantages as compared to the space truss. Advantages include requiring fewer members to cover a given span, correlating to the self-weight of the structure, and a decrease in complexity of the connections. Additionally, it was found that the total load capacities of the structures are essentially equal. Disadvantages of the origami truss include a greater deflection and number of required connections for a given span. Despite the drawbacks, the origami truss is concluded to be a viable structure that needs further investigations to understand the limitations that would need to be placed on it for use in practice