Application of power algorithm optimization for optimal placement of BRB in 3D shear wall frame building structure

Abstract This paper examines the optimal placement, numbers, and shape of Buckling Restrained Braces (BRB) for a 3D shear-wall frame building structure based on linear static analysis utilizing ETABS software. The total amount BRBs referred to as number are considered design variables objective function be minimized is maximum story displacement inter-story drift. diagonal (D), X-shape (X), V-shape (V), Inverted (Inv-V) installed between shear walls simultaneously with initial stiffnesses 1K0, 2K0, 4K0, 8K0, respectively. Then, performance efficiency carried out identify effectiveness stiffness, BRB shapes, stories. Based results optimization procedure analysis, it found that can improved by optimizing placement within stories rather than using in all most location install middle at upper lower shown have minor or no effects reducing responses structure. Furthermore, model Inv-V, V, X shapes almost same performance, while has lowest efficiency. Additionally, achieved larger stiffness. proposed method further validated comparing MATLAB programming. It concludes this study saves 40% used height allows structural designer decide shape, stiffness either predetermined level experiences RC wall-frame structures.