Experimentally-calibrated numerical investigation of soil stiffness, permeability, bucket size, and damping effects on seismic response of offshore wind turbine foundations.
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| Title: | Experimentally-calibrated numerical investigation of soil stiffness, permeability, bucket size, and damping effects on seismic response of offshore wind turbine foundations. |
|---|---|
| Authors: | Zayed, Muhammad1,2 (AUTHOR) muhammad.zayed@eng.asu.edu.eg, Prabhakaran, Athul3 (AUTHOR) aparayancode@structint.com, Qiu, Zhijian4 (AUTHOR) zhijianqiu@xmu.edu.cn, Zheng, Yewei5 (AUTHOR) yzheng@whu.edu.cn, Elgamal, Ahmed1,6 (AUTHOR) elgamal@ucsd.edu |
| Source: | Soil Dynamics & Earthquake Engineering (0267-7261). Apr2026, Vol. 203, pN.PAG-N.PAG. 1p. |
| Subjects: | Seismic response, Permeability, Pore water pressure, Modulus of rigidity, Damping (Mechanics), Building foundations, Finite element method |
| Abstract: | A nonlinear finite element (FE) model calibrated using shake table testing data is used to simulate seismic response of utility-scale offshore wind turbine (OWT) bucket foundation. A parametric study is conducted to investigate influence of i) soil stiffness, ii) soil permeability, iii) bucket size, and iv) structural viscous damping on the system response, with special attention to foundation rotation, permanent deformation and pore pressure build-up characteristics. The results suggest that: i) the near field pore water pressure build-up and bucket rotation are correlated, ii) lower soil permeability results in larger rotation due to the higher near field pore water pressure build-up, iii) permanent bucket rotation reaches a maximum and a minimum at the lower and upper bounds of soil permeability, respectively, corresponding to fully drained and undrained conditions, iv) the difference in permanent bucket rotation between undrained and drained conditions tends to decrease with increasing soil stiffness, v) within the range of investigated scenarios, a linear correlation can be expressed between the OWT fundamental frequency and the permanent bucket rotation, with diminishing effect of soil stiffness at the larger bucket sizes (i.e., stiffer foundation). In addition, it was noted that viscous damping at higher frequencies can have a significant impact on bucket moment-rotation response. The findings provide a valuable extension to existing seismic design tools and contribute towards developing performance-based seismic design guidelines for bucket foundation OWT. • An experimentally calibrated nonlinear FE model using shake table data evaluates seismic response of OWT bucket foundations. • The study quantifies coupled effects of soil stiffness, permeability, bucket geometry, and damping on seismic performance. • Permeability-dependent bounds on permanent rotation are established for drained and undrained conditions. • Increased soil stiffness is shown to reduce drained–undrained rotation disparity. • A linear relationship is observed between the investigated range of OWT fundamental frequency and permanent bucket rotation. [ABSTRACT FROM AUTHOR] |
| Copyright of Soil Dynamics & Earthquake Engineering (0267-7261) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 191383419 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Experimentally-calibrated numerical investigation of soil stiffness, permeability, bucket size, and damping effects on seismic response of offshore wind turbine foundations. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zayed%2C+Muhammad%22">Zayed, Muhammad</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> muhammad.zayed@eng.asu.edu.eg</i><br /><searchLink fieldCode="AR" term="%22Prabhakaran%2C+Athul%22">Prabhakaran, Athul</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> aparayancode@structint.com</i><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Zhijian%22">Qiu, Zhijian</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> zhijianqiu@xmu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Yewei%22">Zheng, Yewei</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> yzheng@whu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Elgamal%2C+Ahmed%22">Elgamal, Ahmed</searchLink><relatesTo>1,6</relatesTo> (AUTHOR)<i> elgamal@ucsd.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Soil+Dynamics+%26+Earthquake+Engineering+%280267-7261%29%22">Soil Dynamics & Earthquake Engineering (0267-7261)</searchLink>. Apr2026, Vol. 203, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Seismic+response%22">Seismic response</searchLink><br /><searchLink fieldCode="DE" term="%22Permeability%22">Permeability</searchLink><br /><searchLink fieldCode="DE" term="%22Pore+water+pressure%22">Pore water pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Modulus+of+rigidity%22">Modulus of rigidity</searchLink><br /><searchLink fieldCode="DE" term="%22Damping+%28Mechanics%29%22">Damping (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Building+foundations%22">Building foundations</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A nonlinear finite element (FE) model calibrated using shake table testing data is used to simulate seismic response of utility-scale offshore wind turbine (OWT) bucket foundation. A parametric study is conducted to investigate influence of i) soil stiffness, ii) soil permeability, iii) bucket size, and iv) structural viscous damping on the system response, with special attention to foundation rotation, permanent deformation and pore pressure build-up characteristics. The results suggest that: i) the near field pore water pressure build-up and bucket rotation are correlated, ii) lower soil permeability results in larger rotation due to the higher near field pore water pressure build-up, iii) permanent bucket rotation reaches a maximum and a minimum at the lower and upper bounds of soil permeability, respectively, corresponding to fully drained and undrained conditions, iv) the difference in permanent bucket rotation between undrained and drained conditions tends to decrease with increasing soil stiffness, v) within the range of investigated scenarios, a linear correlation can be expressed between the OWT fundamental frequency and the permanent bucket rotation, with diminishing effect of soil stiffness at the larger bucket sizes (i.e., stiffer foundation). In addition, it was noted that viscous damping at higher frequencies can have a significant impact on bucket moment-rotation response. The findings provide a valuable extension to existing seismic design tools and contribute towards developing performance-based seismic design guidelines for bucket foundation OWT. • An experimentally calibrated nonlinear FE model using shake table data evaluates seismic response of OWT bucket foundations. • The study quantifies coupled effects of soil stiffness, permeability, bucket geometry, and damping on seismic performance. • Permeability-dependent bounds on permanent rotation are established for drained and undrained conditions. • Increased soil stiffness is shown to reduce drained–undrained rotation disparity. • A linear relationship is observed between the investigated range of OWT fundamental frequency and permanent bucket rotation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Soil Dynamics & Earthquake Engineering (0267-7261) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.soildyn.2025.110043 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Seismic response Type: general – SubjectFull: Permeability Type: general – SubjectFull: Pore water pressure Type: general – SubjectFull: Modulus of rigidity Type: general – SubjectFull: Damping (Mechanics) Type: general – SubjectFull: Building foundations Type: general – SubjectFull: Finite element method Type: general Titles: – TitleFull: Experimentally-calibrated numerical investigation of soil stiffness, permeability, bucket size, and damping effects on seismic response of offshore wind turbine foundations. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zayed, Muhammad – PersonEntity: Name: NameFull: Prabhakaran, Athul – PersonEntity: Name: NameFull: Qiu, Zhijian – PersonEntity: Name: NameFull: Zheng, Yewei – PersonEntity: Name: NameFull: Elgamal, Ahmed IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 02677261 Numbering: – Type: volume Value: 203 Titles: – TitleFull: Soil Dynamics & Earthquake Engineering (0267-7261) Type: main |
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