“…In order to obtain the failure envelope of the foundation under combined loading, load-controlled analysis and displacementcontrolled analysis have been used in numerical simulation (Bransby and Randolph, 1997;Monajemi and Razak, 2009). The results show that the yield surfaces determined by the load-controlled and displacement-controlled approaches are consistent, as reported by Taiebat and Carter (2002), Gourvenec and Randolph (2003).…”
Section: Failure Envelope In H-m Load Spacementioning
“…In order to obtain the failure envelope of the foundation under combined loading, load-controlled analysis and displacementcontrolled analysis have been used in numerical simulation (Bransby and Randolph, 1997;Monajemi and Razak, 2009). The results show that the yield surfaces determined by the load-controlled and displacement-controlled approaches are consistent, as reported by Taiebat and Carter (2002), Gourvenec and Randolph (2003).…”
Section: Failure Envelope In H-m Load Spacementioning
“…A constant stiffness ratio of E clay /s u = 500 is adopted (Hu, Randolph, and Watson, 1999;Monajemi and Razak, 2009), where s u is the undrained shear strength and E clay is the Young's modulus of the clay. The properties used to describe soil and bucket foundation in the numerical analysis are shown in Table 1.…”
“…Clukey et al [6] studied the failure behaviors of suction caissons in normally consolidated clays by conducting centrifuges. Many researches including model tests and numerical simulations have been carried out to study the pullout capacity of suction bucket caissons under vertical loads, horizontal loads, bending moment loads, and the combination of these loads [7][8][9][10][11][12][13]. Many analytical approaches such as limit equilibrium method [14,15], finite element analysis method [16][17][18], and finite element limit analysis method [19][20][21] have been proposed to investigate the pullout behaviors of suction caissons.…”
The bearing capacity of suction caissons is the key to the design of offshore structures. A new type of cross-shaped low-skirted suction caisson is invented to effectively improve the bearing capacity, considering inevitable “soil plug” phenomenon. The behaviors of penetration and pullout for new low-skirted suction caisson are investigated by performing model tests. A new formula for calculating the penetration resistance is suggested based on the limit equilibrium theory and the test data, which can consider the change of the lateral area of the suction caisson during penetration. The behaviors of low-skirted suction caisson under inclined loading are analyzed by carrying out finite element simulation. The effects of loading angles and loading positions on the ultimate bearing capacity and failure mechanism of low-skirted suction caissons are discussed. The research results can provide a reference for the design of suction bucket foundation for offshore structures.
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