Optimization of gridshell bar orientation using a simplified genetic approach

TL;DR

This paper introduces a simplified genetic algorithm approach combined with a geometrical compass method to optimize bar orientations in gridshell structures, aiming to minimize stresses and prevent breakage during construction.

Contribution

It presents a novel, integrated numerical method for optimizing gridshell bar orientations under shape and boundary constraints, improving structural safety.

Findings

Optimized bar orientations reduce maximum stresses.

The method effectively prevents bar breakage during construction.

Applications demonstrate the approach's practicality.

Abstract

Gridshells are defined as structures that have the shape and rigidity of a double curvature shell but consist of a grid instead of a continuous surface. This study concerns those obtained by elastic deformation of an initially flat two-way grid. This paper presents a novel approach to generate gridshells on an imposed shape under imposed boundary conditions. A numerical tool based on a geometrical method, the compass method, is developed. It is coupled with genetic algorithms to optimize the orientation of gridshell bars in order to minimize the stresses and therefore to avoid bar breakage during the construction phase. Examples of application are shown.