Effect of Near and Far Fault Earthquake on the Shear Wall and Buckling Restrained Braces

Near fault earthquakes compared to far-fault earthquakes have greater potential to create damage in structure. In this paper, the effect of far fault and near fault events on structural response of reinforced concrete shear wall with buckling restrained brace frame in tall and mid-rise buildings is studied. In the modeling, the specification of the reinforced shear wall and the buckling restrained braces is used. This kind of structural system is essentially a combined system. In this study, the structural system of the considered buildings is designed by using the valid codes and using response spectrum analysis method. Then, the nonlinear model is prepared. In the numerical model of the walls, the fiber type elements is used. The nonlinear time history analysis is implemented subjected to the far fault and near fault earthquakes. Finally, the responses of the structures are analyzed and compared. The results showed that, in the level of the base, the amount of shear demand of the wall share in the near field and far field is more than three times and twice the amount of shear demand share of braces. On average, the values of the strain demand ratio to the yielding strain in the core of the braces under the near field earthquakes was about 22, which is approximately 12 for the far field earthquakes.