Journal ArticleDOI
Hybrid foundation for offshore wind turbines: Environmental and seismic loading
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In this paper, a hybrid foundation for offshore wind turbines (OWT) is studied, combining a monopile of diameter d and length L with a lightweight circular footing of diameter D. The footing is composed of steel plates and stiffeners forming compartments, backfilled to increase the vertical load.About:
This article is published in Soil Dynamics and Earthquake Engineering.The article was published on 2016-01-01. It has received 55 citations till now. The article focuses on the topics: Seismic loading & Shallow foundation.read more
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A review of foundations of offshore wind energy convertors: Current status and future perspectives
TL;DR: In this article, a review of foundations for offshore wind energy convertors considering the significant growth of offshore wind power since the early 2000s is presented, where the characteristics of various foundation types (i.e., gravity, pile, suction caisson, and float type) and current status of field application are discussed.
Journal Article
Permanent strains of piles in sand due to cyclic lateral loads. technical note
TL;DR: In this paper, the authors applied the strain superposition concept, proposed for ballast study, to evaluate strain accumulation for laterally loaded piles in sand and showed that the soil properties, types of pile installation, cyclic loading types, pile embedded length, and pile/soil relative stiffness ratio are important factors that influence the pile behavior under mixed lateral loads.
Journal ArticleDOI
Seismic fragility analysis of monopile offshore wind turbines under different operational conditions
TL;DR: In this paper, a finite element model for a 5 MW monopile offshore wind turbine was developed using the OpenSees platform, where the interaction between the monopile and the seabed soil was modeled as a beam-on-nonlinear-winkler-foundation (BNWF).
Journal ArticleDOI
Numerical analysis of the cyclic loading behavior of monopile and hybrid pile foundation
Wenbing Wu,josgandos +1 more
TL;DR: In this paper , the behavior of hybrid pile foundation under cyclic lateral load was studied based on three-dimensional coupled discrete continuum modeling. And the influence of pile stiffness and hybrid foundation type was considered.
Journal ArticleDOI
Static and dynamic loading behavior of a hybrid foundation for offshore wind turbines
TL;DR: In this paper, an innovative hybrid foundation consisting of a traditional monopile and a wide-shallow bucket is developed for offshore wind turbines in severe marine environments, and a series of numerical analyses are conducted to investigate its behavior under the static and dynamic loading, considering various loading eccentricities.
References
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Journal ArticleDOI
Unified dynamic shear moduli and damping ratios of sand and clay
Isao Ishibashi,Xinjian Zhang +1 more
TL;DR: In this article, the experimental data on dynamic shear moduli and damping ratios of various soils including non-plastic sands to highly plastic clays are collected and reanalyzed and brought into simple unified formulas.
Journal ArticleDOI
The response of flexible piles to lateral loading
TL;DR: In this article, a parametric study was conducted using the finite element method and treating the soil as an elastic continuum with a linearly varying soil modulus, and the results of a simple algebraic expression for the active length of the pile; the ground level deformations; and the maximum bending moment down the pile were presented.
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Generalized Solutions for Laterally Loaded Piles
Hudson Matlock,Lymon C. Reese +1 more
TL;DR: In this article, a repeated application of elastic theory is used to determine the nonlinear force-deformation characteristics of soil, and soil modulus constants are adjusted for each successive trial until satisfactory compatibility is obtained in structure-pile-soil system.
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Response of stiff piles in sand to long-term cyclic lateral loading
TL;DR: In this article, a series of laboratory tests were conducted where a stiff pile in drained sand was subjected to between 8000 and 60 000 cycles of combined moment and horizontal loading, and a typical design for an offshore wind turbine monopile was used as a basis for the study, to ensure that pile dimensions and loading ranges were realistic.