Results of six regular building structured with concentrically braced steel frames are reported in this paper. Models were designed following a capacity design procedure for this structural system adapted for the Mexico's Federal District Code (MFDC-04) in order to obtain a collapse mechanism advocated by the code: strong column – weak beam – weaker brace, and a more realistic assessment of ductility and overstrength seismic modification factors. Buildings 10, 14 and 18 stories in height located in soft soils according to MFDC-04 were evaluated. Pushover analyses and nonlinear time-history analyses under ten selected earthquake ground artificial motions related to the corresponding design spectrum of MFDC-04 were performed using OpenSees software.