To further study the seismic performance of PEC column-steel beam composite frame structural system

a small scale model of a two-story and one bay composite frame with a ratio of 1/2 was designed.Seismic test was conducted on the model under low-cycle reversed loading.Based on experimental observation and measurements

the hysteretic loops were derived

and the seismic performance

such as hysteretic characteristics

lateral resistant stiffness

mechanical behavior of joint

energy dissipation

ductility and failure mode were analyzed.The research results show that the model has a high bearing capacity and large lateral resistant stiffness.The location of the plastic hinge is away from the panel zone by reducing the beam section

and the force-transfer mode of concrete strut improves the shear strength in the panel zone with end-plate and through-out bolts connection.The test model has approximately a full hysteretic loop.Its global drift

ductility efficient and equivalent viscous damping ratio are 3.50%（push）/4.50%（pull）

2.92（push）/3.21（pull）and 0.306 respectively when its bearing capacity is still larger than 85% of its ultimate capacity.It proves that the test model has better deformation

ductility and energydissipation capacity.The plastic failure mode induced by the plastic hinges first occurs on the reduced beam section of steel beam and then at the foot of the PEC column.