Optimal design of building structures using hybrid genetic algorithm

On the basis of the practical structure design of engineering,the constraint conditions that the norm stipulates and the demands of various engineering standards were sufficiently considered,and a model of structural optimization with discrete variables was derived.Moreover a hybrid genetic algorithm(HGA) composed of the forward-and-back searching algorithm(FBSA) for structural optimization with discrete variables and the standard genetic algorithm(SGA) is proposed in the paper,taking their advantages of powerfully local searching capability of FBSA,as well as the global searching capability of genetic algorithm(GA).The results by exemplification show that HGA,as an efficient optimal method having the advantages of both SGA and FBSA without their disadvantages,is superior to either one.It can be applied to optimal design of various engineering structures.