Seismic performance analysis method for falling layer frame structure

The invention discloses a seismic performance analysis method for a falling layer frame structure. The method comprises step 1 of establishing a falling layer frame structure model on slope land; step2 of selecting a seismic wave according to the principle of achieving consistency of spectral characteristics; step 3 of inputting, by a lower grounding layer column base, the seismic oscillation acceleration time history of the selected seismic wave, and inputting, by an upper grounding layer column base, lambda times the seismic oscillation acceleration time history of the selected seismic wave, wherein lambda is a horizontal seismic oscillation amplification coefficient of an upper ground layer; and step 4 of calculating a seismic performance index, wherein the seismic performance index includes a maximum interlayer displacement angle, the shear force of an upper grounding layer column, the rod end ductility coefficient ratio, and the rod end rate of plastic hinges. According to the seismic performance analysi