RESEARCH ON THE OPTIMIZATION OF LIFTING POINTS FOR INTEGRAL LIFTING OF STRUCTURES BASED ON NSGA-Ⅱ ALGORITHM
There are some problems in integral lifting of large-span steel structural roof,such as large quantity of lifting points and uncertain optimal position.To address the optimization problem of the number and positions of lift-ing points for overall structural enhancement under multiple optimization objectives,this paper introduces the NS-GA-Ⅱ algorithm based on the traditional genetic algorithm.The optimization algorithm's calculation process and ob-jective functions have been improved,resulting in the proposed algorithm for optimizing the layout of lifting points for overall structural enhancement.Hangzhouxi Railway Station is taken as the case,and the proposed algorithm is used to obtain the optimal quantity of lifting points and optimal position.The results show that the proposed optimiza-tion layout algorithm exhibits efficient convergence,which achieves the optimal solution with minimal overall struc-tural strain energy and minimal variance in lifting point reaction forces through a small number of iterations.
genetic algorithmNSGA-Ⅱlayout of lifting pointsmulti-objective optimizationintegral lifting
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