Influence of the design objectives on the seismic performance of steel moment resisting frames retrofitted with buckling restrained braces

Abstract Buckling restrained braces (BRBs) represent an effective strategy for the seismic retrofit of existing steel moment resisting frames (MRFs), as they contribute to increasing strength and ductility capacity structure. However, current design strategies do not provide recommendations on how performance increase is achieved. Prioritising either or has impact damage evolution affects overall A low typically requires larger exploitation (i.e., damage) structure, while a high produces significant stiffness, which often accompanied by demands that may limit effectiveness retrofitting solution. The present study assesses these decisions MRFs retrofitted with BRBs. For this purpose, two several BRB configurations are used case structures. Finite Element Models built in OpenSees assessed through Incremental Dynamic Analyses account record‐to‐record variability. Fragility relationships derived based local Engineering Demand Parameters (EDPs) describe structural non‐structural damage, well path‐dependent indicators residual drifts cumulative BRBs). comparison structures carried out terms risk estimates seismicity location.