Abstract
This study aims to investigate the response of flexible piles in the course of cyclic and post-cyclic lateral loadings for different loading scenarios including cyclic loading pattern, loading frequency, and also amplitude. For this purpose, an experimental program has been organized and a series of tests were conducted on a model pile embedded in dry sand. Experimental p–y curves derived from bending moment profiles for different loading patterns, namely symmetric two-way, asymmetric two-way, full one-way, and one-way patterns without complete unloading were studied. The results indicate that the stiffness is highly dependent on the cyclic loading pattern, and the two-way cyclic loading was found to increase the lateral force and soil stiffness more than any other factor. Also, compared to the monotonic loading, the residual force induced by one-way loading and one-way loading without complete unloading causes the lateral bearing capacity to decrease significantly. In addition, the post-cyclic load–displacement response of the pile was found to be influenced by the number of cycles, loading amplitude, and soil density index. Finally, a comparative study revealed that predictions made by the API code for the lateral resistance of flexible piles embedded in dry sand underestimate the p–y curves obtained from experimental observation.
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Owji, R., Habibagahi, G. & Veiskarami, M. Effects of Cyclic and Post-cyclic Loading on Lateral Response of Flexible Piles Embedded in Dry Sand. Int J Civ Eng 21, 633–645 (2023). https://doi.org/10.1007/s40999-022-00790-5
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DOI: https://doi.org/10.1007/s40999-022-00790-5