Experimental investigation of the vertical pullout cyclic response of bucket foundations in sand. (October 2017)

• Record Type: Journal Article
• Authors: Hung, Le Chi; Lee, Sihoon; Tran, Nghiem Xuan; Kim, Sung-Ryul
• Is Part Of: Applied ocean research. Volume 68(2017)
• Page Start: 325
• Page End: 335
• Publication Date: 2017-10
• Subjects: Bucket foundation -- Accumulated displacement -- Unloading stiffness -- Sand -- Cyclic vertical pullout load -- 1 g model tests; Ocean engineering -- Periodicals; 620.416205
• DOI: 10.1016/j.apor.2017.06.006
• Languages: English
• ISSNs: 0141-1187

Abstract

Highlights: Cyclic response of bucket foundations in saturated sand under cyclic vertical pullout load was examined by 1 g model tests. Accumulated displacement increased with the increase in number of load cycles and load magnitude. Unloading stiffness decreased with the increase in number of load cycles and load magnitude. Empirical equations have been proposed. 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 10 4 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.