Seismic Analysis of Building Structure with Buckling Restrained Brace (original) (raw)

Conventional braces have limited deformation ductility capacity, and exhibit unsymmetrical hysteretic cycles, with marked strength deterioration when loaded in compression. To overcome the above mentioned problems, a new type of brace was developed in Japan called as buckling restrained braces, designated as BRB's. These braces are designed such that buckling is inhibited to occur, exhibiting adequate behavior and symmetrical hysteretic curves under the action of both tensile and compressive cycles, produced by the action of seismic and wind forces. Nonlinear time history analysis, response spectrum method and pushover analysis of 10-story 2D frame is carried using software, ETAB. The response parameters used to evaluate structural performance are natural time period, story displacement, inter story drift, story shear and axial forces.