EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF PRESTRESSED CONCRETE PIPE PILE WITH HYBRID REINFORCEMENT

A total of 7 prestressed concrete pipe piles with hybrid reinforcement (PRC pipe pile) and 3 prestressed concrete pipe piles (PHC pipe pile) were tested, hence the shear capacities of the two kinds of pipe piles were obtained. The influences of non-prestressed steel bars and axial compression were analyzed. It was indicated that introducing non-prestressed steel bars could increase the shear capacities and shear stiffness. Meanwhile, increasing the axial compression force would raise the shear capacities of pipe piles. The tests were simulated by finite element models and the numerical results were in a good agreement with the test results. Based on the obtained test and numerical data, a modified formula for calculating the shear capacities of PRC pipe piles has been proposed, which contributes to the establishment of the technical specification for the design of PRC pipe piles.