A GENETIC ALGORITHM FOR OPTIMAL BRIDGE PILLAR LOCATION
Abstract:
Abstract. A genetic algorithm for optimal location of bridge pillars is introduced. Instead of encoding in the chromossome the various geometric parameters needed to completely define the geometry of the bridge, domain knowledge is introduced and only the position of the bridge pillars and a parameter that defines the beam height from span values are used as design variables. Additional domain knowledge is introduced in the development process that generates a bridge design from each genotype and also in the fitness evaluation process. As a result, designs with incompatible beam height and span values will neither be generated nor tested by the algorithm. The search space is greatly reduced and there is no need to explicitly introduce all the structural behaviour constraints, thus allowing for an unconstrained search process. Different objective functions can be considered and both the minimization of the compliance and of the maximum support reaction are presented. 1 Afonso C.C. Lemonge and Helio J.C. Barbosa
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