In this paper by surveying the behavior of concentric braced frame, a method to improve their seismic performance is presented. The channel section, is one of the most widely used profiles in the brace that It's asymmetric moment of inertia, radius of gyration and slenderness ratio around two main axis, causes buckling around weak axis and non-ductile performance. Also, the criterion of allowable compressive bearing capacity around weaker axis causes uneconomical design process. So, in the first step the double channel sections were divided into 2 groups called weak around X axis and Y axis. Then, their weakness has been compensated by adding steel plate or T shape profile. Finally, the effect of the modified profile was evaluated using nonlinear static analysis by ABAQUS finite element software. Results show a significant improvement in the seismic performance of the brace so that the compressive force absorption capacity is increased by 15-24% in different samples. Due to the ease of implementation and relatively low cost increase, it seems that the use of this method can be used to improve the performance of concentric braces.