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Experimental investigation of the vertical pullout cyclic response of bucket foundations in sand |
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| Institution: | 1. Department of Civil Engineering, National University of Ireland Galway, Ireland;2. School of Physics, National University of Ireland Galway, Ireland;3. Rhehwa Engineering Co., Ltd., Centum dong-ro, Haeundae-gu, Busan, South Korea;4. Department of Civil Engineering, Dong-A University, 840 Hadan2-dong, Saha-gu, Busan, South Korea;5. Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, South Korea;1. CCCC Fourth Harbor Engineering Institute Co., Ltd., Guangzhou 510230, China;2. School of Civil Engineering Tianjin University, Tianjin 30072, China |
| Abstract: | 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. |
| Keywords: | Bucket foundation Accumulated displacement Unloading stiffness Sand Cyclic vertical pullout load |
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