Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines
During the service period, the offshore wind turbine foundation mainly bears the wind load from the upper structure and the periodic loads such as wave load and sea currents from the lower structure. Long-term cyclic loads have an important impact on the cumulative deformation, foundation stiffness...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/18/3/572 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850199332154769408 |
|---|---|
| author | Hanbo Zhai Puyang Zhang Junqi Ren |
| author_facet | Hanbo Zhai Puyang Zhang Junqi Ren |
| author_sort | Hanbo Zhai |
| collection | DOAJ |
| description | During the service period, the offshore wind turbine foundation mainly bears the wind load from the upper structure and the periodic loads such as wave load and sea currents from the lower structure. Long-term cyclic loads have an important impact on the cumulative deformation, foundation stiffness changes, and horizontal ultimate bearing capacity of the offshore wind turbine bucket foundation. This paper conducts cyclic loading tests on mono-bucket foundations under unidirectional and multidirectional cyclic loading conditions based on the multidirectional intelligent cyclic loading system of offshore wind turbine foundations and analyzes the cumulative effects of the loading direction, vertical load, and drainage status on the mono-bucket foundation during the cyclic loading process, effects of rotation angle, cyclic stiffness, and monotonic bearing capacity of foundation after cycles. The research results show that multidirectional cyclic loading significantly reduces the cyclic cumulative rotation angle of the mono-bucket foundation, and the maximum reduction rate can reach more than 50%. After unidirectional and multidirectional cyclic loading, the bearing capacity of the bucket foundation can be increased by up to 30% and 20%, respectively. At the same time, this paper proposes calculation formulas for vertical load, number of cyclic loading, and normalized cumulative rotation and establishes a calculation method for vertical load and bearing capacity of the foundation after cycles. |
| format | Article |
| id | doaj-art-8eafe0a57c5240b3a0476ca7534635eb |
| institution | OA Journals |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-8eafe0a57c5240b3a0476ca7534635eb2025-08-20T02:12:38ZengMDPI AGEnergies1996-10732025-01-0118357210.3390/en18030572Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind TurbinesHanbo Zhai0Puyang Zhang1Junqi Ren2Institute of Science and Technology Research, China Three Gorges Corporation, Beijing 101199, ChinaState Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300072, ChinaDuring the service period, the offshore wind turbine foundation mainly bears the wind load from the upper structure and the periodic loads such as wave load and sea currents from the lower structure. Long-term cyclic loads have an important impact on the cumulative deformation, foundation stiffness changes, and horizontal ultimate bearing capacity of the offshore wind turbine bucket foundation. This paper conducts cyclic loading tests on mono-bucket foundations under unidirectional and multidirectional cyclic loading conditions based on the multidirectional intelligent cyclic loading system of offshore wind turbine foundations and analyzes the cumulative effects of the loading direction, vertical load, and drainage status on the mono-bucket foundation during the cyclic loading process, effects of rotation angle, cyclic stiffness, and monotonic bearing capacity of foundation after cycles. The research results show that multidirectional cyclic loading significantly reduces the cyclic cumulative rotation angle of the mono-bucket foundation, and the maximum reduction rate can reach more than 50%. After unidirectional and multidirectional cyclic loading, the bearing capacity of the bucket foundation can be increased by up to 30% and 20%, respectively. At the same time, this paper proposes calculation formulas for vertical load, number of cyclic loading, and normalized cumulative rotation and establishes a calculation method for vertical load and bearing capacity of the foundation after cycles.https://www.mdpi.com/1996-1073/18/3/572offshore wind turbinebucket foundationmultidirectional cyclic loadingaccumulated rotation anglecyclic stiffness |
| spellingShingle | Hanbo Zhai Puyang Zhang Junqi Ren Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines Energies offshore wind turbine bucket foundation multidirectional cyclic loading accumulated rotation angle cyclic stiffness |
| title | Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines |
| title_full | Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines |
| title_fullStr | Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines |
| title_full_unstemmed | Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines |
| title_short | Horizontal Cyclic Bearing Characteristics of Bucket Foundation in Sand for Offshore Wind Turbines |
| title_sort | horizontal cyclic bearing characteristics of bucket foundation in sand for offshore wind turbines |
| topic | offshore wind turbine bucket foundation multidirectional cyclic loading accumulated rotation angle cyclic stiffness |
| url | https://www.mdpi.com/1996-1073/18/3/572 |
| work_keys_str_mv | AT hanbozhai horizontalcyclicbearingcharacteristicsofbucketfoundationinsandforoffshorewindturbines AT puyangzhang horizontalcyclicbearingcharacteristicsofbucketfoundationinsandforoffshorewindturbines AT junqiren horizontalcyclicbearingcharacteristicsofbucketfoundationinsandforoffshorewindturbines |