Abstract
The influence of load pattern and Poisson’ s ratio effect on the pullout performance of the anchor bolt, which were connected with pipe pile by core concrete, were investigated by three anchorage-beam pullout tests and one self-balanced pullout test. Theoretical and finite element analysis were also employed to explore the influence of load pattern and Poisson’ s ratio effect on the ultimate friction at the pipe-core-concrete contact surface. The results show that the load pattern and Poisson’ s ratio effect of pipe pile have a great influence on the pullout characteristics of the anchor bolt. The maximum relative displacements between core concrete and pipe pile and between anchor bolt and core concrete in self-balanced pullout test are 0.913 mm and 0.935 mm, respectively, which are significantly greater than that in anchorage-beam pullout test where the displacements are 0.292 mm and 0.500 mm, respectively. In the self-balanced test, the pipe pile is under compression and expands radially due to the Poisson’ s ratio effect. In the anchorage-beam test, on the contrary, the pipe pile is under tension and shrinks radially. As a consequence, the ultimate friction between core concrete and pipe pile in the anchorage-beam test is higher than that in the self-balanced test by 15.1% to 28.7%. Accordingly, the results of anchorage-beam pullout test are more sensible for the anchor bolt design.
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Acknowledgments
The work described in this paper was supported by the National Natural Science Foundation of China (Grant No. 51978540). The project has been also supported by PowerChina Hubei Electric Engineering Co. Ltd. and Suizhou Power Supply Company of State Grid Hubei Electric Power Co. Ltd..
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Fang, Q., Yang, Z., Zhang, C. et al. Influence of Test Method and Poisson’ s Ratio Effect on Pullout Performance of Anchor Bolt in Pile. KSCE J Civ Eng 24, 3775–3784 (2020). https://doi.org/10.1007/s12205-020-0037-y
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DOI: https://doi.org/10.1007/s12205-020-0037-y