Abstract
The performance of axially loaded defective pile groups in sand was evaluated numerically in this paper. A three-dimensional finite element model was developed and validated against experimental tests of defective pile groups found elsewhere in the literature. The validated model was used to conduct a parametric study to examine the influence of three design parameters on the capacity and serviceability of defective pile groups: pile group configuration, pile spacing, and defective pile failure scenario. Analysis results indicate that the reduction in pile group capacity and axial stiffness is greater when corner or edge defective piles fail as compared with middle piles. The reduction is further increased with the increase in the pile spacing. The redistribution of the axial load originally carried by the defective pile to the adjacent piles upon defective pile failure was quantified in this research for 5-pile, 7-pile, and 9-pile groups in terms of so-called redistribution factor. The factor can be used by practitioners as an approximation to assess the ultimate capacity of defective pile groups.
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Funding was provided by Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada (Grant No. RGPAS-020-00101).
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Alhashmi, A.E., El Naggar, M.H. & Oudah, F. Performance of axially loaded defective pile groups in sand: capacity and serviceability evaluation. Innov. Infrastruct. Solut. 8, 124 (2023). https://doi.org/10.1007/s41062-023-01086-w
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DOI: https://doi.org/10.1007/s41062-023-01086-w