Ductility capacity models for buckling-restrained braces

Abstract Buckling-restrained braces (BRBs), which are braces that do not buckle in compression, have recently become popular for use in the primary lateral-force-resisting systems of structures located in high seismic regions of the United States. Although testing has shown that BRBs possess high ductility capacity, no generally accepted method yet exists to predict the cumulative plastic ductility capacity of a BRB. This research developed ductility capacity models for BRBs using a statistical framework and the results of past experimental studies. The primary outcome of the research is a model with sufficient accuracy for predicting BRB failure in engineering applications.