Design optimization of structural steelwork using a genetic algorithm, FEM and a system of design rules. (Q2739089)

The paper deals with a structural optimization technique based on a modified genetic algorithm (GA). The technique is developed to deal with discrete design optimization of structural steelwork. In order to consider realistic steelwork design problems, a modified genetic algorithm has been linked to a system of structural design rules, interacting with a finite element package. The objective function is the total weight of structural members, as it gives a reasonably accurate estimation of the cost. The cross-sectional properties of structural members which form the set of design variables, are chosen from two separate catalogues. The minimum weight designs of two plane steel frame structures subjected to realistic multiple loading cases are obtained. These examples show that the modified GA in combination with structural design rules provides an efficient tool for practicing designers of steel frame structures.