Investigation of Performance of Perforated Core Steel Buckling Restrained Brace

Abstract

AbstractEnergy Dissipating Devices (EDDs) are used to control structural vibration. Buckling-Restrained-Braces (BRBs) are observed as one of the most effective structural techniques used for resisting lateral forces generated due to earthquakes as they exhibit symmetric load-deformation behavior. The use of all-steel BRB is getting widespread because of its advantages over the traditional concrete BRB. All-steel BRB is entirely made of steel by sandwiching the core plate with the outer restraining element. Perforated core plate BRB is a recently innovated EDD. The steel core segment is perforated in different configurations along the length to dissipate the seismic energy. In this study, a numerical investigation is carried out to predict all-steel perforated core BRB (PBRB) cyclic response. The numerical models are validated with the previous experimental study. Numerical finite element modeling is carried out using ABAQUS software. This validated model is further used to carry out the investigation of the cyclic performances of PBRBs. Various configurations are considered to study the cyclic performance of PBRBs. Axial strength, hysteresis response, and energy dissipation are observed to evaluate the cyclic performances of PBRBs. Results show that the configuration of PBRB has a substantial impact on the stability of perforated BRB.KeywordsBuckling restrained bracePerforated buckling restrained braceFinite element analysisAxial strengthHysteresis response