EXPERIMENTAL RESEARCH ON ASEISMIC BEHAVIOR OF PRESTRESSED HIGH STRENGTH CONCRETE PIPE PILES

Four PHC pipe piles were tested on a seismic performance under low cyclic loading.The influence of pile core and configurating non-prestressed reinforcement on the failure characteristic, hysteretic performance, skeleton curve, ductility performance, and rigidity degradation of pipe piles were analyzed.The results indicated that the deformation capacity of pipe piles could be improved by pile core;the hysteretic performance, ductility performance and energy dissipation capacity of pipe piles could be improved more effectively by configurating some non-prestressed reinforcement.