Journal
APPLIED OCEAN RESEARCH
Volume 68, Issue -, Pages 325-335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apor.2017.06.006
Keywords
Bucket foundation; Accumulated displacement; Unloading stiffness; Sand; Cyclic vertical pullout load; 1 g model tests
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Funding
- Basic Science Research Program - Ministry of Education, South Korea [NRF-2016R1A6A1A03012812]
- Development of Life-cycle Engineering Technique and Construction [16SCIP-B119960]
- Korea Agency for Infrastructure Technology Advancement(KAIA)
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A series of 1 g model tests was conducted to investigate the accumulated vertical pullout displacement and unloading stiffness of bucket foundations embedded in dry and saturated sands. The foundations were subjected to vertical pullout cyclic loading with different load amplitudes. Cyclic load was applied up to 104 cycles. Test results showed that the accumulated vertical pullout displacement increased with the increase in the number of load cycles and cyclic load amplitudes. The unloading stiffness of the bucket foundations decreased with the increase in load amplitude and number of cycles. Empirical equations were proposed based on the test results to evaluate the accumulated vertical pullout displacement and unloading stiffness of the bucket foundations in saturated sand. These equations can be used for the preliminary design of single or tripod bucket foundations. (C) 2017 Elsevier Ltd. All rights reserved.
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