TEST OF MOMENT BEARING CAPACITY AND DUCTILITY PERFORMANCE OF FILLED PRESTRESSED CONCRETE PIPE PILE

Under the horizontal earthquake action, the jointed region of a pipe pile with base platform subjected to largemoment and shear force. According to the technical standard of prestressed concrete pipe pile, the reinforced concrete arefilled in the upper pile for one meter to improve the ductility and enhance bearing capacity. But the bearing capacity andductility of filled prestressed concrete pipe pile are rarely known upto now. Two specimens were tested in low_cycle reverseloads to investigate the momen bearing capacity and ductility performance for both filled pile and unfilled one. The tests showthatthe ductility factor of section and the moment bearing capacity of the filled pipe pile have larger improvement ascompared with those of the unfilled one.