Abstract
In order to improve the bearing characteristics of prestressed high-strength concrete (PHC) piles, this paper proposes the use of steel strands and steel bars instead of steel reinforcement for PHC piles or PHC piles wrapped in BFRP. Eight PHC piles were tested under low-cycle loading to study their seismic performance. Through the analysis of the test phenomena, hysteresis curve, skeleton curve, strength and stiffness degradation, ductility and energy dissipation, it is found that the bearing capacity of the PHC pile coated with BFRP is much higher than that of the other types of piles. The PHC piles with steel bars and steel strands as the main reinforcement have the best seismic performance. ABAQUS was used to establish nonlinear finite element models. The results show that the experimental results are in good agreement with the finite element results. In addition, it is found that increasing the reinforcement ratio has no effect on improving the bending capacity of the PHC pile, while increasing the reinforcement ratio of the main reinforcement can improve the ultimate bending moment of the PHC pile.
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Funding
This work was supported by the Research Innovation Program for College Graduates of Jiangsu Province (KYLX18-0127), the National Natural Science Foundation of China (51878160, 51808112), and the Natural Fund Project of Jiangsu Basic Research Program (BK20180155)
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Cao, X., Dai, G., Gong, W. et al. Experimental study on the seismic behavior of new PHC piles. Arab J Geosci 13, 778 (2020). https://doi.org/10.1007/s12517-020-05819-4
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DOI: https://doi.org/10.1007/s12517-020-05819-4