Literature Synthesis -- Batch 05 Agent 3 (Files 881--920)¶
Generated: 2026-04-17
Individual Paper Summaries¶
| # | Author | Year | Title | Core Finding | Method | Tags |
|---|---|---|---|---|---|---|
| 1 | DJ Kim et al. | 2013 | Numerical Analysis of Cluster and Monopod Suction Bucket Foundation | Compared cluster vs monopod bucket foundation performance numerically for offshore wind | 3D FEM (ABAQUS) | suction-bucket, FEM, offshore-wind, monopod, cluster |
| 2 | DJ Kim et al. | 2014 | Investigation of Monotonic and Cyclic Behavior of Tripod Suction Bucket Foundations Using Centrifuge Modeling | Tripod bucket moment-rotation is bilinear; yield moment is half of monopod but rotation at yield is only 20%; cyclic loading below monotonic yield causes negligible plastic deformation | Centrifuge testing (KAIST) | tripod-bucket, centrifuge, cyclic-loading, silty-sand, offshore-wind |
| 3 | DJ Kim et al. | 2014 | Numerical Studies on Combined VH Loading and Inclination Factor of Circular Footings on Sand | Investigated VH combined bearing capacity and inclination factors for circular footings on sand using Mohr-Coulomb FEM | 3D FEM | bearing-capacity, VH-loading, inclination-factor, circular-footing, sand |
| 4 | DJ Kim et al. | 2014 | Numerical Studies on Combined VM Loading and Eccentricity Factor of Circular Footings on Sand | Studied VM combined capacity and eccentricity factors using Mohr-Coulomb associated flow rule | 3D FEM | bearing-capacity, VM-loading, eccentricity-factor, circular-footing, sand |
| 5 | DJ Kim et al. | 2014 | Bearing Capacity Factor Ngamma and Shape Factor of Strip and Circular Footings on Sand According to Dilatancy Angle | Dilatancy angle significantly influences Ngamma and shape factors for footings on sand | 3D FEM | bearing-capacity, Ngamma, dilatancy, shape-factor, sand |
| 6 | DJ Kim et al. | 2015 | Jacking Penetration Resistance of Bucket Foundations in Silty Sand Using Centrifuge Modelling | Measured penetration resistance of bucket foundations jacked into silty sand via centrifuge | Centrifuge testing | bucket-foundation, penetration-resistance, silty-sand, centrifuge, installation |
| 7 | DW Kim et al. | 2016 | Review of Offshore Monopile Design for Wind Turbine Towers | Existing p-y design from small-diameter piles may be inadequate for large-diameter monopiles (up to 10 m); validation needed | Literature review | monopile, lateral-load, p-y-curves, large-diameter, design-review |
| 8 | Dai et al. | 2021 | Influence of Soil Scour on Lateral Behavior of Large-Diameter Monopile and Scour Monitoring | Scour significantly affects p-y curves and bending moments but soil displacement field retains two-zone failure pattern; proposed natural-frequency-based scour monitoring method | FEM + model tests | scour, monopile, p-y-curves, natural-frequency, monitoring |
| 9 | Taeseri (Thesis) | 2017 | The Non-Linear Behaviour of Foundations in Slopes During Seismic Events | Investigated nonlinear foundation response in slopes under seismic loading | Centrifuge + FEM (ETH Zurich) | seismic, slopes, nonlinear, foundation, centrifuge |
| 10 | Darvishi-Alamouti et al. | 2017 | Natural Frequency of OWT on Rigid and Flexible Monopiles in Cohesionless Soils | Simplified Rayleigh method for OWT natural frequency using Winkler soil model with linearly varying subgrade modulus; excellent agreement with FEM for rigid piles | Analytical (Rayleigh) + FEM | natural-frequency, monopile, Winkler, cohesionless-soil, analytical |
| 11 | Dekker (Thesis) | 2014 | The Modelling of Suction Caisson Foundations for Multi-Footed Structures | Developed modelling approaches for suction caissons supporting multi-footed offshore structures | FEM (Delft/NTNU) | suction-caisson, multi-footed, modelling, offshore-wind |
| 12 | Fu (Thesis, UWA) | 2017 | Combined VHM Loading Capacity of Preloaded Skirted Circular Foundations in Clay | Preloading with consolidation substantially increases undrained bearing capacity of skirted foundations; developed VHM failure envelopes | Centrifuge + FEM (UWA) | skirted-foundation, VHM-loading, preloading, consolidation, clay |
| 13 | Bakmar/LeBlanc (Thesis) | 2009 | Design of Offshore Wind Turbine Support Structures | Addressed selected geotechnical topics for OWT support structure design including monopiles and bucket foundations | Experimental + analytical | OWT-design, geotechnical, monopile, bucket, Denmark |
| 14 | Desrues et al. | 1996 | Void Ratio Evolution Inside Shear Bands in Triaxial Sand by CT | Pioneered CT scanning to observe void ratio evolution within shear bands during triaxial compression | CT scanning + triaxial tests | shear-bands, void-ratio, CT-scan, sand, triaxial |
| 15 | Efthymiou & Gazetas | 2022 | Sidewall Shell Contribution to Lateral Capacity of Suction Caissons in Clay | For L/R > 1 the cylindrical shell alone provides nearly the same lateral capacity as the full caisson; tensionless interface significantly reduces failure loads | 3D FEM (ABAQUS) | suction-caisson, lateral-capacity, sidewall-shell, clay, failure-envelope |
| 16 | F Yang (Thesis, UWA) | 2021 | A Novel Approach for Probabilistic Prediction of Offshore Jack-Up Installations | Developed probabilistic framework for predicting jack-up spudcan installation using centrifuge data | Centrifuge + probabilistic methods | jack-up, spudcan, probabilistic, installation, centrifuge |
| 17 | Fallais et al. | 2022 | Farm Wide Sensitivity Assessments of Resonant Frequencies of OWT FE Models | Discrepancies between as-designed and as-built natural frequencies arise from soil-structure interaction uncertainties; farm-wide sensitivity analysis identifies key parameters | FEM + field data (Belgian North Sea) | natural-frequency, sensitivity, farm-wide, SSI, OWT |
| 18 | Foti & Sabia | 2011 | Influence of Foundation Scour on Dynamic Response of an Existing Bridge | Modal identification and pier dynamic response provide effective scour monitoring tools; scour changes natural frequencies even after infill | FEM + dynamic field tests | scour, bridge, modal-analysis, monitoring, dynamics |
| 19 | Fugro | 2011 | Seabed Scour Considerations for Offshore Wind Development on the Atlantic OCS | Comprehensive review of scour factors for US Atlantic OWT siting; lessons from European OWFs; micro-zoning methodology for sediment mobility | Review + case studies | scour, Atlantic-OCS, offshore-wind, seabed, sediment-mobility |
| 20 | Futai et al. | 2021 | Comparison of Dynamic Responses of Monopiles and GBFs for OWT in Sand Using Centrifuge | Centrifuge tests confirm SSI must be considered for natural frequency; fn reduces substantially from fixed-base values for both monopiles and GBFs | Centrifuge (piezo-actuator) | monopile, gravity-base, natural-frequency, centrifuge, sand |
| 21 | Garala et al. | 2022 | Kinematic Pile Bending in Layered Soils Using Dynamic Centrifuge Modelling | Peak kinematic bending moment occurs below the layer interface; elastic solutions underestimate for large earthquakes; soil nonlinearity must be considered | Dynamic centrifuge | kinematic-bending, layered-soil, centrifuge, seismic, pile |
| 22 | Garcia et al. | ~2022 | Field Data-Based Correlation Between Scour at OWFs and Hydrodynamic Drivers | Scour depth at Robin Rigg correlates more with tidal current direction than water depth; storm events can increase or backfill scour depending on wave-current angle | Field data analysis | scour, field-data, OWF, hydrodynamics, Robin-Rigg |
| 23 | Gazetas | 1984 | Seismic Response of End-Bearing Single Piles (copy 1) | Even long end-bearing piles can modify base excitation; key parameters are Ep/Es, L/d, f/f1, and fst/f1 | FEM (parametric study) | seismic, end-bearing-pile, kinematic-interaction, impedance |
| 24 | Gazetas | 1984 | Seismic Response of End-Bearing Piles (copy 2) | Duplicate of #23 | FEM | seismic, pile, impedance |
| 25 | Gazetas | 1991 | Foundation Vibrations (book chapter) | Comprehensive engineering procedure for dynamic spring and dashpot coefficients of foundations using algebraic formulae and charts | Analytical/semi-analytical | foundation-vibrations, impedance, spring-dashpot, machine-foundation |
| 26 | Gazetas | 1991 | Formulas and Charts for Impedances of Surface and Embedded Foundations | Provides impedance functions for surface and embedded foundations (mostly metadata recovered) | Analytical | impedance, embedded-foundation, formulas, charts |
| 27 | Gazetas | 2013 | Soil-Foundation-Structure Systems Beyond Conventional Seismic Failure Thresholds | Allowing foundation uplift and bearing-capacity mobilization can protect superstructures; challenges the conventional prohibition of foundation yielding in seismic design | Numerical + experimental | rocking, seismic, performance-based-design, nonlinear-SSI, uplift |
| 28 | Gazetas et al. | 2013 | Nonlinear Rocking Stiffness of Foundations | Three-stage performance model (elastic, uplift, bearing failure) for surface foundations under overturning moment; closed-form formulas for each stage | FEM (ABAQUS) | rocking, nonlinear-stiffness, uplift, bearing-capacity, clay |
| 29 | Gelagoti et al. | 2015 | Estimation of Elastic and Non-Linear Stiffness Coefficients for Suction Caisson Foundations | Translated stiffness reference point to caisson top; developed charts for stiffness reduction with increasing rotation/displacement for both full-contact and interface conditions | 3D FEM | suction-caisson, stiffness, nonlinear, elastic, design-charts |
| 30 | Gelagoti, Kourkoulis, Gazetas et al. | 2017 | On the Adequacy of Existing Foundation Schemes for OWT Subjected to Extreme Loading | Evaluated whether current foundation types (monopile, suction caisson) are adequate under extreme environmental loads | FEM / parametric | OWT, extreme-loading, foundation-adequacy, suction-caisson, monopile |
| 31 | Efthymiou & Gazetas | 2018 | Elastic Stiffnesses of a Rigid Suction Caisson and Its Cylindrical Sidewall Shell | For shell L/R > 0.5 the sidewall provides essentially the same stiffness as the whole caisson; closed-form expressions for homogeneous and Gibson soil | 3D FEM (ABAQUS) | suction-caisson, elastic-stiffness, sidewall-shell, Gibson-soil, closed-form |
| 32 | Radhima, Kanellopoulos & Gazetas | 2022 | Static and Dynamic Lateral Non-Linear Pile-Soil-Pile Interaction | Nonlinear interaction factors diminish rapidly with displacement amplitude; gap formation affects group response; superposition valid only below ~50% of ultimate lateral capacity | 3D FEM | pile-group, interaction-factors, nonlinear, gap-formation, dynamic |
| 33 | Efthymiou & Gazetas | 2022 | Sidewall Shell Contribution to Lateral Capacity (duplicate of #15) | Duplicate entry | 3D FEM | suction-caisson, lateral-capacity |
| 34 | Gens | 2010 | Soil-Environment Interactions in Geotechnical Engineering (Rankine Lecture) | Generalises classical soil mechanics to incorporate suction, thermal, and chemical effects; constitutive frameworks for unsaturated, frozen, and chemically reactive soils | Theoretical + case histories | unsaturated-soil, thermal, chemical, constitutive, Rankine-lecture |
| 35 | Gottardi et al. | 1999 | Plastic Response of Circular Footings on Sand Under General Planar Loading (copy 1) | Established experimental VHM failure envelope for circular footings on sand; foundational dataset for macro-element models | Physical model tests | VHM-envelope, circular-footing, sand, plasticity, macro-element |
| 36 | Gottardi et al. | 1999 | Plastic Response of Circular Footings on Sand (copy 2) | Duplicate of #35 | Physical model tests | VHM-envelope, sand |
| 37 | Gottardi et al. | 1999 | Plastic Response of Circular Footings on Sand (copy 3) | Duplicate of #35 | Physical model tests | VHM-envelope, sand |
| 38 | Gourvenec | 2007 | Shape Effects on Capacity of Rectangular Footings Under General Loading | For zero-tension interface the normalised VMH envelope shape is independent of footing aspect ratio; capacity increases with reducing footing length for a given area | FEM + analytical | shape-effect, rectangular-footing, VMH-envelope, undrained, bearing-capacity |
| 39 | Gourvenec | 2008 | Effect of Embedment on Undrained Capacity of Shallow Foundations Under General Loading | Both size and shape of VHM failure envelopes depend on embedment ratio; challenges assumption of isotropic expansion with depth factors | FEM | embedment, shallow-foundation, failure-envelope, depth-factor, undrained |
| 40 | Gourvenec et al. | 2017 | A Toolbox for Optimizing Geotechnical Design of Subsea Foundations | Four optimization pathways: analysis methodology, foundation configuration, site characterisation, and basis of design; web-based design tools for practitioners | Centrifuge + FEM + analytical | subsea-foundation, optimization, design-toolbox, mudmat, deep-water |
Synthesis¶
CONSENSUS¶
-
Soil-structure interaction (SSI) must be included in natural frequency prediction. Futai (2021), Darvishi-Alamouti (2017), and Fallais (2022) all demonstrate that fixed-base assumptions overestimate natural frequency, sometimes dangerously placing the system near resonance. This is now an undisputed requirement across monopile and gravity-base foundation types.
-
Suction caissons are a viable alternative to monopiles for OWT. Studies by Efthymiou & Gazetas (2018, 2022), Gelagoti et al. (2015, 2017), Dekker (2014), and DJ Kim (2013, 2014) collectively establish that bucket foundations offer competitive stiffness and capacity with easier installation. The sidewall shell alone provides nearly the full lateral stiffness and capacity when embedment exceeds the radius.
-
Combined VHM loading requires failure envelope approaches, not simple superposition. Gourvenec (2007, 2008), Gottardi et al. (1999), Fu (2017), and Efthymiou & Gazetas (2022) converge on the failure envelope framework as the proper way to assess multi-directional capacity of shallow and embedded foundations.
-
Scour significantly degrades foundation performance. Dai (2021), Foti (2011), Garcia (~2022), and Fugro (2011) agree that scour alters lateral behaviour, natural frequency, and bearing capacity. The community has moved toward frequency-based monitoring as a practical detection method.
-
Centrifuge modelling at correct stress levels is essential for validating numerical models. DJ Kim (2014, 2015), Futai (2021), Garala (2022), and Fu (2017) all rely on centrifuge experiments as the ground-truth benchmark for FEM and analytical predictions.
DEBATES¶
-
Interface condition modelling for suction caissons. Efthymiou & Gazetas (2022) show that fully bonded vs. tensionless-sliding interfaces produce drastically different capacity estimates. The "correct" interface condition for design remains unresolved and site-specific, with undrained conditions potentially sustaining tension that would not exist in drained or partially drained scenarios.
-
Adequacy of existing p-y curves for large-diameter monopiles. DW Kim (2016) and Dai (2021) highlight that current design standards based on small-diameter pile databases may be unconservative for monopiles with diameters up to 10 m. The appropriate modification or replacement framework is actively debated.
-
Foundation yielding as a protective mechanism. Gazetas (2013) provocatively argues that allowing bearing-capacity mobilization and uplift can protect superstructures, directly contradicting Eurocode 8 requirements that foundations remain elastic. This "rocking isolation" concept remains controversial despite supporting numerical and experimental evidence.
-
Nonlinear superposition for pile groups. Radhima et al. (2022) show that linear superposition of interaction factors breaks down above ~50% of ultimate lateral capacity. Whether simplified nonlinear interaction factors can be reliably generalized across soil types and group configurations is unresolved.
GAPS¶
-
No unified framework connects scour evolution to long-term SSI degradation and natural frequency shift. Individual studies address scour mechanics or frequency monitoring separately, but a predictive model coupling time-dependent scour with dynamic SSI over the turbine lifetime is missing.
-
Cyclic and fatigue behaviour of suction caissons in sand. Most caisson capacity studies focus on clay (Efthymiou, Gourvenec, Fu). DJ Kim (2014) provides centrifuge data in silty sand, but systematic cyclic degradation curves for sand under OWT-relevant loading histories are scarce.
-
Farm-wide interaction effects on foundation design. Fallais (2022) and Garcia (~2022) begin to address farm-scale phenomena, but there is no established methodology for how the presence of adjacent turbines modifies individual foundation design loads via wake-induced turbulence or cumulative seabed alteration.
-
Probabilistic design integration. F Yang (2021) addresses probabilistic installation prediction for jack-ups. Equivalent probabilistic capacity and serviceability frameworks for OWT suction caissons and monopiles under combined loading remain underdeveloped.
-
Validation of closed-form stiffness expressions at intermediate strain levels. Efthymiou & Gazetas (2018) and Gelagoti et al. (2015) provide elastic and nonlinear charts, but the transition regime between "small strain elastic" and "failure" lacks calibration against field monitoring data from operational OWTs.
METHODS¶
| Method | Papers Using It | Strengths | Limitations |
|---|---|---|---|
| 3D FEM (ABAQUS) | Efthymiou 2018/2022, Gazetas 2013, Gelagoti 2015, DJ Kim 2013/2014, Radhima 2022, Gourvenec 2007/2008 | Full stress-strain resolution, interface modelling, parametric sweeps | Computationally expensive, constitutive model sensitivity |
| Centrifuge testing | DJ Kim 2014/2015, Futai 2021, Garala 2022, Fu 2017, F Yang 2021 | Correct stress levels, physical validation | Scale effects on grain size, limited test matrix |
| Analytical / Rayleigh | Darvishi-Alamouti 2017, Gazetas 1991 | Fast, transparent, suitable for preliminary design | Requires simplified soil profiles, limited nonlinearity |
| Field data analysis | Garcia ~2022, Fallais 2022, Foti 2011 | Real conditions, long-term trends | Site-specific, limited parametric control |
| Failure envelope framework | Gottardi 1999, Gourvenec 2007/2008, Fu 2017, Efthymiou 2022 | Unified VHM capacity assessment | Requires extensive numerical/experimental calibration per geometry |
BENCHMARKS¶
- Gottardi et al. (1999): Foundational VHM experimental dataset for circular footings on sand (255 citations). Widely used to calibrate macro-element models.
- Gazetas (1991): Canonical reference for foundation impedance functions (spring-dashpot coefficients). Still the standard starting point for SSI analyses.
- Gourvenec (2007, 2008): Benchmark FEM results for rectangular footing shape effects and embedment depth factors under combined loading in undrained clay.
- Efthymiou & Gazetas (2018): Closed-form stiffness expressions for rigid suction caissons in homogeneous and Gibson soil, validated against Doherty et al. (2005).
- DJ Kim et al. (2014): Centrifuge benchmark for tripod vs monopod bucket foundations in silty sand under monotonic and cyclic loading at KAIST facility.