Evaluation the Performance and Seismic Comparison of Steel Moment Dual Systems in Rocking Frames with CBF and EBF Bracing

In recent years, considering vertical movement in structures, which is known as self-centering motion, is one of the methods used to dissipate the earthquake energy. In this study, 4-, 8-, and 12-Story steel structures with special concentrically braced frame (SCBFs) and eccentrically braced frames ‎(SEBFs) ‎were considered in order to investigate the effect of self-centering ‎motion under seven near-field earthquakes using Sap 2000 software. The results of this research indicate that considering the self-centering ‎motion, the behavior of structures are changing in SCBFs and SEBFs. In ‎, 4-, 8-, and 12-Story SEBFs structures with considering the self-centering ‎motion, the column and bracing ‎forces were increased which this was different with SCBFs ‎ structures. Considering the self-centering ‎motion, more plastic joints are formed in the beams. Therefore, in the self-centering ‎of the columns, the beams outside the bay are more affected. In general, the results indicate that the self-centering ‎motion is better in the SCBFs.