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A proper composition of stiffness and ductility parameters is required to obtain a resistant and economic structure. Accordingly, Chevron Knee Braced Frame (CKBF) seems appropriate due to its proper seismic performance. The advantage of this system comes to having the capability of rapid and cheap replacement of chevron knee elements after an earthquake occurs. In this research, response modification factor and over-strength factor are determined for CKBF in two statuses of chevron V bracing and chevron inverted V bracing. The effect of using Easy-Going Steel (EGS) on the knee is also studied in the 3,6,9 and 12 story frames. In addition, the methods used for this purpose are nonlinear static analysis, linear dynamic analysis and Incremental Dynamic Analysis (IDA). IDAs have been conducted on 17 records of important universal earthquakes using Opensees software.

The Effects of Using Easy-Going Steel Knee Element on Seismic Behavior of CKBF