In order to study the seismic failure mechanism and performance level of recycled aggregate concrete filled steel tube（RACFST）frame

quasi-static tests were carried out on two frames including recycled aggregate concrete filled circular/square steel tube column-reinforced recycled aggregate concrete beam

with the replacement rate of recycled coarse aggregate of 100%.The failure characteristic and mechanism

hysteretic curves of load versus displacement and hysteretic curves of load versus strain were measured

and the criteria to determine the performance level of RACFST frame specimens based on performance design were discussed.It is shown that the seismic failure mechanism of the specimens was"strong column but weak beam

strong shear capacity but weak bending capacity

and strong node but weak components".Hysteretic curves of load versus displacement exhibited a full fusiform and were basically symmetrical.When frame specimens were damaged

the longitudinal strain of steel tube at column top was all less than yield strain

and that at column bottom reached about 10000με

indicating good deformability of specimens.Longitudinal strain of steel reinforcement at beam end was more than yield strain for both specimen KJ-1 and KJ-2

and only stirrup strain of specimen KJ-1 reached yield strain.Hysteretic curves of load versus transverse strain of steel tube develop spirally along tensile strain axis.Based on the performance design of RACFST structures

five performance levels were divided

and horizontal displacement angle and damage index limit were established.