Research on the Seismic Performance of Prefabricated Bridge Piers Using UHPC Grout under an Eccentric Load

At present, research on prefabricated piers is limited to the axial compression state. However, many are under small eccentric in practical engineering. In this article, seismic performance of ultrahigh concrete (UHPC)-grouted corrugated pipe-connected was studied. A pseudostatic test carried out by using a pier column model connected with UHPC-grouted pipes. The failure mechanism plastic hinge area base studied, and mode, energy dissipation capacity, displacement ductility, ultimate bearing capacity were compared those an ordinary axially compressed structure. result shows that conventional cast-in-place(CIP) pier, overall ductility factor assembled pipe-connection decreased approximately 5.0% 10%, respectively. pinching phenomenon hysteresis curve precast more obvious. When compression, close CIP improved 20%. Comparison two same UHPC grout connections stiffness degradation process similar compression. But coefficient increased about caused different damage degrees zone at bottom column. load direction as additional bending moment 55% lower than opposite direction.