Beam-column joint of prefabricated self-centering RC frame based on SMA material

A prefabricated Reinforced Concrete (RC) frame, comprising:

• an RC precast column;
• an RC precast beam;
• and
• a beam-column joint comprising:
• self-centering energy dissipation dampers, wherein the self-centering energy dissipation dampers comprise two self-centering energy dissipation dampers arranged at an interval in an up-down direction, wherein the RC precast beam is arranged between the self-centering energy dissipation dampers;
• each of the self-centering energy dissipation dampers comprises a Shape Memory Alloy (SMA) core, an upper restraint cover plate, a lower restraint cover plate, a column-end connection reinforcing plate and a beam-end connection reinforcing plate;
• the SMA core is connected between the upper restraint cover plate and the lower restraint cover plate, and a set energy dissipation gap is reserved between the SMA core and the upper restraint cover plate;
• the column-end connection reinforcing plate is connected to both the SMA core and the RC precast column by column-end high-strength bolts, and the beam-end connection reinforcing plate is connected to both the SMA core and the RC precast beam by beam-end high-strength bolts;
• a friction energy dissipation damper, comprising a column connecting plate partially embedded in the RC precast column and a beam-end connecting plate partially embedded in the RC precast beam, wherein the column connecting plate and the beam-end connecting plate each are provided with a primary connecting hole and secondary connecting holes in one-to-one correspondence;
• the secondary connecting holes are distributed in a circumferential direction of the primary connecting hole, and each of the secondary connecting holes on the beam-end connecting plate is an arc-shaped elongated hole, and the primary connecting hole and the secondary connecting holes on each of the column connecting plate and the beam-end connecting plate are provided with shear bolts penetrating therethrough.