Energy dissipation and damping effect analysis of rocking truss-BRB-steel frame system

The proper BRB components are chosen in the swing interface to enhance the dissipation capacity of the structural system as well as control and reduce the seismic damage of structures. Based on time history analysis under rare earthquakes, energy dissipation, energy time history curves, cumulative plastic displacement ratio of BRB components, and the damage concentration factor of the structure have been analyzed. The results show that the hysteretic loops of BRB components on the swing interface are full, which have stable energy dissipation capacity under earthquakes.The sequence and amount of story earthquake energy dissipation are determined by the yield order and energy consumption of BRBs in this story. The cumulative plastic displacement ratio increases with the increase of the number of stories. The lateral deformation and damage of the rocking truss-BRB-steel frame are more uniform than steel frame, with the addition of BRB energy dissipation function, and the resilience of the structural system is improved evidently.