Global Optimization of Hysteretic Dampers for Elastic-Plastic Mdof Structures via Hybrid Approach of Real-Coded Genetic Algorithm and Local Search

The purpose of this paper is to propose a new optimal design method of hysteretic dampers for elastic-plastic MDOF structures using the realcoded genetic algorithm (GA) and local search.In the application of the crossover procedure in the real-coded GA, the sum of damper damping coefficients is kept constant.This constraint enables an efficient search for the solution.In the real-coded GA, design variable vectors are directly treated to create new individuals and the binary expression is not required.The proposed method can deal with elastic-plastic responses directly in time-domain and lead to designs with high reliability.