STUDY ON SEISMIC PERFORMANCE OF THE JOINT OF PRESTRESSED CONCRETE PIPE PILES

Prestressed concrete pipe pile is applied widely.Pipe pile and pile cap joints are structural weaknesses that can easily break under a earthquake, thus resulting in serious consequences.By changing the connection form of a pipe pile and pile cap, and imposing cyclic loading on the structure to simulated seismic wave, it was studied on pipe pile load-displacement hysteresis, ductility etc.Test results showed that adding non-prestressed rebar within the filled pipe pile could increase evidently the bearing capacity of pipe piles;and using to non-prestressed rebar dowels inserted at an angle in the connection between the cap and pipe pile could have a great improvement on the structural ductility and seismic energy dissipation of the joint.