Drained Capacity of a Suction Caisson in Sand under Inclined Loading

Zhao, Liang; Gaudin, Christophe; O’Loughlin, Conleth; Hambleton, J.P.; Cassidy, Mark; Herduin, Manuel

doi:10.1061/(asce)gt.1943-5606.0001996

Cited by 27 publications

(2 citation statements)

References 27 publications

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“…For dense sand (D r = 100%) used in the centrifugal test [12], Young's modulus E and the peak internal friction angle ϕ p are taken from the literature [49] after being obtained from triaxial tests; that is, E = 658 p a (σ 3 /p a ) 0.469 and ϕ p = 40.9-7.8l g (σ 3 /p a ), where p a is the standard atmospheric pressure (101.3 kPa) and σ 3 is the confining pressure and takes the value of gravity stress γ'H, kPa. The values of ϕ p herein are relatively close to those for dense uwa sand in the recent literature [50,51], and their difference is 1~2 • . The values of E and ϕ p for loose sand (D r = 30%) and medium dense sand (D r = 60%) were calculated proportionally based on the literature [52].…”

Section: Fem Modelsupporting

confidence: 87%

Numerical Investigation of Uplift Failure Mode and Capacity Estimation for Deep Helical Anchors in Sand

Yuan

Hao

Chen

et al. 2023

JMSE

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The uplift capacity of helical anchors is generally taken as the control condition for design in different applications, including transmission tower foundations and offshore structures. However, it is difficult to identify the failure surface for a deep helical anchor, which may result in an incorrect assessment of uplift capability. This research proposes a new unified method to estimate the uplift capacity of deep single-helix and multi-helix anchors based on the investigation of failure mechanisms. The deep failure mode was identified by FEM analysis using a modified Mohr–Coulomb model considering the strain softening of sand, along with the coupled Eulerian–Lagrangian technique. Thereby, a simplified rupture surface is proposed, and the equations estimating the uplift capacity are presented by the limit equilibrium method. Two important factors—the lateral earth pressure coefficient and the average internal friction angle included in the equations—are discussed and determined. The comparisons with centrifugal tests verify the reasonability of the proposed method.

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Section: Fem Modelsupporting

confidence: 87%

Numerical Investigation of Uplift Failure Mode and Capacity Estimation for Deep Helical Anchors in Sand

Yuan

Hao

Chen

et al. 2023

JMSE

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“…Compared with field tests and laboratory experiments, numerical simulations have become the predominant method for investigating the dynamic responses of the seabed around suction caissons. In recent years, the finite element method (FEM) has been widely utilized for the study of soil behavior in the vicinity of suction anchors [23][24][25][26]. Specifically, Fu et al [25] utilized ABAQUS finite element analysis software to assess the impact of tension gaps on the holding capacity of suction anchors in offshore settings, focusing on determining optimal padeye positions and offering practical design strategies to address these gaps.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Composite Load-Induced Seabed Response around a Suction Anchor

Ma,

Zhao,

Jeng

2024

JMSE

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Suction anchors play a crucial role as marine supporting infrastructure within mooring systems. In engineering practice, the composite load comprising nonlinear waves and cyclic pull-out loads can have adverse effects on the seabed soil, posing a threat to the pull-out bearing capacity of the suction anchor. While existing research predominantly focuses on cyclic pull-out loads, the influence of nonlinear wave actions at the seabed surface remains overlooked. This study employs a two-dimensional integrated numerical model to investigate the dynamic soil response around a suction anchor under the influence of both nonlinear waves and cyclic pull-out loads, focusing on the mechanisms that lead to liquefaction and the deterioration of the interfacial friction due to the excess pore pressure buildup. The numerical results reveal that the cyclic pull-out load is the primary factor in the deterioration of the frictional resistance at the suction–soil interface, especially when the pull-out load is inclined with the suction anchor. Parametric studies indicate that the relative difference in frictional resistance deterioration between cases considering and excluding surface water waves becomes more pronounced in soils characterized by a small consolidation coefficient (Cv) and relative density (Dr).

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Pullout Behavior of Suction Piles in Saturated Sand Subjected to Combined Vertical and Horizontal Loading – Centrifuge and Finite Element Analysis

Kim,

Jo,

Jang

2024

KSCE J Civ Eng

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Drained Capacity of a Suction Caisson in Sand under Inclined Loading

Cited by 27 publications

References 27 publications

Numerical Investigation of Uplift Failure Mode and Capacity Estimation for Deep Helical Anchors in Sand

Numerical Investigation of Uplift Failure Mode and Capacity Estimation for Deep Helical Anchors in Sand

Numerical Modeling of Composite Load-Induced Seabed Response around a Suction Anchor

Pullout Behavior of Suction Piles in Saturated Sand Subjected to Combined Vertical and Horizontal Loading – Centrifuge and Finite Element Analysis

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