Experimental research on ductility of high strength concrete pipe piles reinforced by steel fiber

In order to research the effect of steel fiber and volume ratio of steel fiber on ductility behavior of the prestressed high strength concrete pipe pile,the prestressed high strength concrete pipe pile reinforced by wire end hook steel fibers,shear end hook steel fiber and without reinforcement were tested under low cyclic loading.The results in terms of damage characteristic,bearing capacity,displacement and ductility were analyzed.It is shown that the damage characteristic of prestressed high strength concrete pipe piles reinforced by steel fiber is improved,the bearing capacity and the deformation behavior are enhanced and the ductility is also improved.With the volume ratio of steel fiber increases,the ductility of prestressed high strength concrete pipe piles reinforced by steel fiber is enhanced.