Abstract
Knee braces located in the corner regions of beams and columns have high potential to be widely used in different structures under wind and earthquake loading. Since it is possible that even such braces experience buckling, some attention has been paid to carry out research on using buckling-restrained knee braces (BRKBs). In this study, BRKBs are used in two structures with different number of stories. Due to high cost of Shape Memory Alloy, SMA, it is only utilized in the core of BRKBs rather than steel material. Nonlinear time-history analysis is conducted to evaluate the behavior of the structures under some well-known earthquake records. The results indicated that adding SMA to the BRKBs can reduce the residual deformations of the frames more than 50%.
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