EFFECTS OF STRONG COLUMN WEAK BEAM RATIO AS CONSTRAINT FOR STEEL FRAME OPTIMIZATION

An approach is presented as usage of genetic algorithm (GA) concept for steel frame optimization. The purpose of this paper is to discuss differences between result of optimization with and without strong column weak beam concept for optimizing steel frame structure. The optimization processes are carried out through 660 members of 2D steel structure model using GA-SAP2000. With strong column weak beam ratio as constraint in optimization, it is not easier to raise the fitness value but the structure will have smaller total drift and good arranged column’s plastic modulus. It is concluded that strong column weak beam constraint is important and should be used in structural design.