Experimental research on hysteretic behavior of prestressed high strength concrete pipe piles

Five prestressed high strength concrete pipe piles were tested under low cyclic loading.The result of failure characteristic,hysteretic characteristic,rigidity degradation,skeleton curve,bearing capacity,displacement and ductility was analyzed.Those effects on hysteretic behavior of prestressed high strength concrete pipe piles were analyzed such as the steel fiber and stirrup ratios.The results show that the hysteretic characteristic of prestressed high strength concrete pipe piles reinforced by fiber is improved.The bearing capacity of prestressed high strength concrete pipe piles reinforced by steel fiber is enhanced.The deformation capacity of specimens increases with the increase of stirrup ratio.