According to seismic design codes, nonlinear performance of structures is considered during strong earthquakes.\r\nSeismic design provisions estimate the maximum roof and story drifts occurring during major earthquakes by\r\namplifying the drifts computed from elastic analysis at the prescribed seismic force level with a displacement\r\namplification factor. The present study tries to evaluate the displacement amplification factors of conventional\r\nconcentric braced frames (CBFs) and buckling restrained braced frames (BRBFs). As such, static nonlinear (pushover)\r\nanalysis and nonlinear dynamic time history analysis have been performed on the model buildings with single and\r\ndouble bracing bays, and different stories and brace configurations (chevron V, invert V, and X bracing). It is\r\nobserved that the displacement amplification factors for BRBFs are higher than that of CBFs. Also, the number of\r\nbracing bays and height of buildings have a profound effect on the displacement amplification factors. The\r\nevaluated ratios between displacement amplification factors and response modification factors are from 1 to 1.12\r\nfor CBFs and from 1 to 1.4 for BRBFs.
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