Full-assembly-type buckling-restrained brace with linear inner core capable of being replaced directly

The invention relates to a full-assembly-type buckling-restrained brace with a linear inner core capable of being replaced directly and belongs to the field of structural engineering. The full-assembly-type buckling-restrained brace is constituted by two linear inner core components, an assembly-type periphery restraining device, two inner core outer side connecting cover plates and a first high-strength bolt group. On the basis of the inner core sectional assembly-type design concept, the axial pressure is transmitted through the linear inner core components in a sectional jacking mode, and axial tension is transmitted through the inner core outer side connecting cover plates and the first high-strength bolt group. The plastic developing areas of the inner core components are controlled by arranging dog bone weakening parts or grooving weakening parts on the linear inner core components, thus the two inner core components can be pulled away from the periphery restraining device to bereplaced only by disassem