The analytical model of the BRB system for strengthening the RC building

In this paper, the Buckling Restrained Brace (BRB) system is utilized for strengthening the RC building. For this purpose, the structural model is constructed in the ABACUS finite element software in which the concrete has nonlinear behavior. The analytical results are then compared with different cases i.e. un-strengthened frame (un-braced building), frame with shear-wall system and building with the CFRP (Carbon Fiber Restrained Polymers) strengthener. Also, three criterions such as the energy absorption, strength and deformation are employed for judgment about the efficiency of strengthening methods. These analyses show that the maximum deformation of the BRB is more than shear-wall system. However; the energy absorption and the strength of the BRB are less than shear-wall model. On the other hand, the efficiency of the BRB system in the energy absorption and maximum displacement is more than the CFRP

Keywords:

Buckling Restrained Brace (BRB) , Nonlinear Frame