Effect of Axial Force on Seismic Performance of Prestressed High-strength Concrete Piles
To study the seismic performance of prestressed high-strength concrete pipe piles under axial force and reciprocating load,the finite element software ABAQUS is used to simulate the prestressed high-strength concrete pipe piles,and compared with existing experimental results.On the basis of verifying the accuracy of the model,the effects of axial compression ratio,the presence or absence of ordinary steel bars,and the diameter of ordinary steel bars on the hysteresis curve,skeleton curve,stiffness degradation,ductility,and energy dissipation capacity of prestressed high-strength concrete pipe piles are studied.The research results show that the configuration of ordinary steel bars can improve the bearing capacity and ductility of prestressed high-strength concrete pipe piles,with little impact on stiffness;as the axial compression ratio increases,the bearing capacity of prestressed high-strength concrete pipe piles gradually increases,but the ductility worsens.When the axial compression ratio is 0.45,the prestressed high-strength concrete pipe piles undergo brittle failure,and the axial compression ratio of the prestressed high-strength concrete pipe piles should not exceed 0.3.
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