Finite Element Analyses Applied in Design of Foundations and Anchors for Offshore Structures

Andresen, Lars; Jostad, Hans Petter; Andersen, Knut H.

doi:10.1061/(asce)gm.1943-5622.0000020

Cited by 32 publications

(9 citation statements)

References 10 publications

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“…Depending on the usage, a suction caisson has also been named as suction anchor, suction pile or bucket foundation. Suction caissons have been successfully employed in recent years in many projects including mooring anchors (Andersen and Jostad, 1999;Andresen et al, 2011;Randolph et al, 2011;Wang et al, 1975), beak water or sea walls (Chu et al, 2012;, offshore platforms (Zhang et al, 2007;Zhang and Ding, 2011) and foundation for wind turbine in deep waters (Byrne et al, 2002;Gavin et al, 2011;Houlsby and Byrne, 2000;Houlsby et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Installation of Concrete Suction Caisson in Clay

Guo¹,

Chu

2015

Ifcee 2015

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A suction caisson is installed by applying suction inside the caisson to create a downward net force to sink the caisson into soil. However, the applied suction pressure will also result in formation of a soil plug. This is particularly the case when the soil is soft and when the caisson wall is thick. In this paper, the results of several model tests carried out using a 1 m in diameter consolidation tank and 205 mm in diameter concrete caisson are reported to study the installation process of a suction caisson in clay. Different caissons and different soil conditions were used. Thus study show that the caisson wall thickness and the properties of clay are two major factors affecting the formation of soil plug which in turn, affects the installation of suction caisson.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Installation of Concrete Suction Caisson in Clay

Guo¹,

Chu

2015

Ifcee 2015

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“…Depending on the phenomenon to model, it may be necessary to take into account finite deformations, so introducing a source of geometric non-linearity in the formulation of the problem (Wang et al 2009). Examples of geomechanical problems where finite deformations are involved are the inception of slopes (Lee et al 2012;Zhu and Randolph 2009;Mohammadi and Taiebat 2014), the consolidation of heavy structures over soft soils (Bienen et al 2015;Andresen et al 2010), the excavation of tunnels (Meguid et al 2002) and wellbores (Spiezia et al 2016), the consolidation settlements around pile foundations (Osman and Randolph 2011;Zhang et al 2015) and the consolidation of mine waste tailings (Caldwell et al 1984), just to recall a few.…”

Section: Introductionmentioning

confidence: 99%

Effects of Finite Strains in Fully Coupled 3D Geomechanical Simulations

2019

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Numerical modelling of geomechanical phenomena and geo-engineering problems often involves complex issues related to several variables and corresponding coupling effects. Under certain circumstances, both soil and rock may experience a non-linear material response, due to e.g. plastic, viscous or damage behavior, and even a nonlinear geometric one, due to large deformations/displacements of the solid. Furthermore, the presence of one or more fluids (water, oil, gas, etc.) within the skeleton must be accounted for when evaluating the interaction between the different phases of the continuum body. A multiphase three-dimensional coupled model in finite strains, suitable for dealing with solid-displacements/fluid-diffusion problems, is here described and an elasto-plastic behavior for the solid phase is assumed. Particularly, a 3D mixed finite element is implemented to fulfill stability requirements of the adopted formulation, as well as a permeability tensor dependent on deformation is introduced. A consolidation scenario induced by filling of silos is investigated and the effects of the adoption of finite strains discussed.

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“…In the literature, the different studies were based on small-scale trials (Das & Seeley, 1975;Murray & Geddes, 1987), the limit equilibrium method (Meyerhof, 1973;Murray & Geddes, 1987;Jesmani et al, 2013), the elastoplastic finite element method (Rowe & Davis, 1982a, 1982bAndresen et al, 2011;Jesmani et al, 2013), models of centrifugal test (Dickin, 1988;Ovesen, 1981), the stress characteristics method (Subba Rao & Kumar, 1994), the upper limit-boundary analysis (Murray & Geddes, 1989;Kumar, 2001;Kumar & Kouzer, 2008;Kouzer & Kumar, 2009) and the lower limit-boundary analysis Khatri & Kumar, 2011). Most of these studies were focused mainly on plates embedded in a homogeneous medium of a single layer of soil.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Vertical Pullout of Plate Anchors Embedded in Reinforced Sand

Siacara¹,

Festugato²

2019

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This paper presents a model to predict the ultimate pullout load (P u) for a shallow single vertical plate anchor embedded in sand and fiber reinforced sand for depth (H)/diameter (D) ratios of 1.0, 1.5 and 2.0. The model was developed based on literature field test results and wide laboratory investigation. The numerical analysis was performed using the software ABAQUS considering elastoplasticity (Mohr Coulomb-Abaqus CAE) for modelling fiber reinforced sand. The results indicate that this type of fiber reinforced sand significantly increases the P u of shallow anchor plates. Based on test results, critical values were discussed and recommended in order to estimate the P u for shallow single vertical plate anchor embedded in sand and fiber reinforced sand. The proposed theory was compared against available bibliography of homogeneous material (sand) in field tests or analytical methods. The variability of the results shows that the proposed method is in the range of expected results. For fiber reinforced sand, no method for comparison has been found literature.

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Finite Element Analyses Applied in Design of Foundations and Anchors for Offshore Structures

Cited by 32 publications

References 10 publications

Experimental Study of Installation of Concrete Suction Caisson in Clay

Experimental Study of Installation of Concrete Suction Caisson in Clay

Effects of Finite Strains in Fully Coupled 3D Geomechanical Simulations

Numerical Simulation of Vertical Pullout of Plate Anchors Embedded in Reinforced Sand

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