Abstract：Based on the low of cyclic loading experiments on bridge pier specimens, the analysis was carried out for the effect of different steel bar strength, stirrup spacing and axial compression ratio on aseismic behavior including damage characteristic, bearing capacity, displacement, hysteretic characteristic, skeleton curve, rigidity degradation, and energy dissipation of bridge pier specimens. It is shown that the steel bar strength, axial compression ratio, and stirrup spacing have great influences on aseismic behavior of the bridge pier with HRB500. With the increase of steel bar strength and the decrease of the axial compression ratio and stirrup spacing, the deformation capacity of the bridge pier with high strength steel bar is enhanced, the hysteretic characteristic is improved, and the rigidity degradation becomes slow. The bearing capacity is enhanced with the increase of steel bar strength and axial compression ratio, and with the decrease of the stirrup spacing.

Keyword：high strength steel bar;low cyclic loading;bearing capacity;seismic behavior;