混合 PSO 在钢管混凝土减震框架优化设计中的应用研究

摘要

通过将粒子群算法（PSO）和遗传算法结合，建立了混合粒子群优化算法，并采用 MATLAB 编写了混合粒子群算法的优化程序，以钢管混凝土减震框架的层间位移角和构件内力为约束条件、各层防屈曲支撑核心单元横截面积总和为目标函数，对地震波作用下的某钢管混凝土减震框架进行了优化分析。优化结果表明：采用混合粒子群算法对地震波作用下的钢管混凝土减震框架进行优化是可行的，与其他优化算法相比，混合粒子群算法具有前期全局搜索能力强，后期局部搜索能力好的特点。%In order to improve the performance of particle swarm optimization (PSO),the hybrid PSO (HPSO) was established through the combination of PSO and genetic algorithm (GA).The optimization program of con-crete filled steel tubular (CFST)frame under this hybrid PSO was written by MATLAB.The inter-story drift an-gles of the structure and the moments of the columns were defined as the constraints,and the objective function of the mathematical model was the sum of the cross section area of the core element of all buckling-restrained braces (BRB).The optimized results of a CFST frame with BRBs showed that it is feasible to optimize the CFST frame with BRBs under earthquake wave by HPSO.The HPSO has the advantages of good global search a-bility in the early optimization stage and good local search ability in the latter optimization stage.