Abstract: To analyze the seismic performance of recycled concrete frame structures,experiments on two 1/2.5 scale two-story two-bay recycled concrete frames under cyclic loading action were conducted.One of the specimens was made from recycled concrete;and the other is made from natural concrete in the first floor and recycled concrete in the second floor.Load-carrying capacity,stiffness and its deterioration process,hysteretic loop,displacement ductility,energy dissipation,failure patterns and failure mechanisms of the specimens are analyzed on the basis of the experiments.Studies show that the load-carrying capacity of the two frame specimens is similar,stiffness deterioration processes are the same,ductility of both the two specimens can meet the seismic requirements,and their failure patterns fit the principle of 'strong column and weak beam'.Recycled concrete can be used in multi-storey frame structures or the top part of high-rise frame structures.