In order to study the seismic behavior of concrete-filled steel bridge piers

an experiment of two concrete-filled circular steel bridge pier specimens and one reinforced concrete pier specimen was carried out subjected to reversed cyclic lateral loading combined with constant axial compression force.Based on the failure process of each specimen

the hysteretic curves and skeleton curves

the seismic performance

such as hysteretic behavior

energy dissipation

ductility

strength reduction and stiffness degradation were analyzed.The test results show that concrete-filled steel bridge piers exhibit much better seismic behavior than reinforced concrete piers in condition of the same axial compression force and equal amount of steel.The hysteretic loops of the concrete-filled steel bridge pier specimen are much fuller than that of the reinforced concrete pier specimen.And the energy dissipation capacity of the former is 3.46 times more than that of the latter.The ductility of the former is better than that of the latter.The results also indicate that the ductility of concrete-filled circular steel bridge piers decreases and the strength reduction increases with axial load ratio increasing.But it seems that axial load ratio has little effect on stiffness degradation.