||This study focus on the seismic performance through the cyclic loading test of
controllable bucking mechanism of multi-story and multi-span knee brace resisting frame.
As shown in the result, the scale of knee braces highly influences its knee bracing frame. The
higher strength the buckling of knee braces is,the higher strength and stiffness of frame
system increases. If the over-strength buckling of knee braces are deployed, the strength of
frame system will be controlled by damage of beam element. Therefore, an appropriate
strength of buckling of knee braces should be employed to generate the better seismic
performance. However, the timing resulting in occurrence of buckling of knee braces is
connected with frame behavior. Provided that the buckling of knee braces occurs earlier,
the strength and stiffness of system will be constrained. The finding also indicates that if
the wide range of strength scale of buckling is deployed in frame system among different
layers, it leads to high discount rate. It is therefore add buckling of knee braces in the
multi-layer frame system. Also, the similar strength of buckling of knee brace is preferable
in multi-layer frame system.