Buckling restrained brace

The utility model discloses a buckling restrained brace, which relates to the technical field of building structures and comprises a restraining sleeve, a core rod is arranged on the inner wall of the restraining sleeve, a plurality of energy consumption plates are fixedly connected to the outer side of the core rod, and functional blocks are slidably connected to the side faces of the energy consumption plates. A plurality of first pressing blocks are fixedly connected to the side faces of the multiple functional blocks, a plurality of second pressing blocks are fixedly connected to the other sides of the multiple functional blocks, the second pressing blocks are connected between every two first pressing blocks in an inserted mode, and non-Newtonian fluid is arranged between the first pressing blocks and the second pressing blocks. Compared with the prior art, the non-Newtonian fluid is extruded by the first pressing block and the second pressing block, so that the pressure can be reduced through the non-Ne