基于改进遗传算法的非线性半刚接钢框架优化

Optimum design of nonlinear steel frames with semi-rigid connections using a modified genetic algorithm

运用小生境技术的改进遗传算法对半刚接多层钢框架进行优化设计,提高了算法的收敛性,可直接从H型钢表或热轧型钢表中选取截面,并且从用钢量角度分析了二阶效应对半刚接钢框架的影响.实际算例表明半刚性连接会使二阶效应的影响增大,用钢量也随之增加.

A niche genetic algorithm based optimum design method is presented for nonlinear muhistory steel frames with semi -rigid connections. The convergence rate is enhanced. Sections can be selected from H steel tables and the second - order effect is considered from the weights of steel. The result shows that the semi - rigid connections can make the second - order effect increase and the weights of steel also increase.