| Summary: | Records of near-field earthquakes due to the closely location of the source wave propagation has special properties That their behavior makes them more different than other records. The most important characteristic of these earthquakes, is a pulse amplitude at the beginning of the record Which has a high energy content. The use of Hysteresis dampers is an effective way to attract a large proportion of this energy. In this paper, according to nonlinear dynamic analysis and using PERFORM 3D software, by adding Buckling Restrained Braces (BRB ) with different configurations to the 4 and 8 story 2D Concrete frames with medium ductility, The seismic performance of Moment-Resisting Frames and retrofitted by Buckling Restrained Braces under seven near-field earthquakes have been measured and compared. According to Nonlinear Dynamic Analysis, The level of story displacement, interstory drift and dissipated energy by buckling restrained braces have been Provided. The results indicate the Buckling Restrained Braces have good performance in absorbing energy and the reduction of story displacement.
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