Details
| Original language | English |
|---|---|
| Title of host publication | Tunneling in Soft Ground, Ground Conditioning and Modification Techniques |
| Subtitle of host publication | Proceedings of the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China |
| Editors | Wen-Chieh Cheng, Junsheng Yang, Jinfeng Wang |
| Pages | 174-186 |
| Number of pages | 13 |
| Edition | 1. |
| ISBN (electronic) | 978-3-319-95783-8 |
| Publication status | Published - 17 Jun 2019 |
| Event | 5th GeoChina International Conference on Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, 2018 - HangZhou, China Duration: 23 Jul 2018 → 25 Jul 2018 |
Publication series
| Name | Sustainable Civil Infrastructures |
|---|---|
| ISSN (Print) | 2366-3405 |
| ISSN (electronic) | 2366-3413 |
Abstract
There are a number of offshore wind farms where the monopile is socketed into rock layers. Since it is socketed into rock, it may behave different from monopile embedded in soil. A numerical modelling of rock socketed monopile is done using finite element (FE) software Abaqus. A stiffness degradation method (SDM) is applied to FE model in order to predict the behaviour under cyclic loading conditions. Parametric studies are carried out by varying rock socketed depth (d), length of monopile below seabed (L), intensity of horizontal loading (H) and subsoil conditions to evaluate the long-term permanent deformation of offshore rock socketed monopile foundations. Suitable permanent deformation factors are proposed for offshore rock socketed monopiles for the first time in the literature. It is observed from the results that the deformation behaviour of the monopile changes from stiff to flexible with increase in rock socketing and in turn the pile head deflection going down. From the bending moment diagram, flexible and stiff behaviour of monopile can be identified and is an indicator of curvature of the deflection line of pile.
Keywords
- Cyclic loading, Lateral deformation, Numerical modelling, Rock socketed monopiles, Stiffness degradation method
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Computational Mechanics
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Environmental Science(all)
- Environmental Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
Tunneling in Soft Ground, Ground Conditioning and Modification Techniques: Proceedings of the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China . ed. / Wen-Chieh Cheng; Junsheng Yang; Jinfeng Wang. 1. ed. 2019. p. 174-186 (Sustainable Civil Infrastructures).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Analysis of Offshore Rock Socketed Monopile Foundations Considering Stiffness Degradation
AU - Basheer, Nivya
AU - Abdel-Rahman, Khalid
AU - Albiker, Johannes
AU - Chakraborty, Tanusree
AU - Achmus, Martin
N1 - Funding Information: This work has been carried out with scholarship funded by DAAD for Ms. Navy Basheer for a period of six months. This work is a result of collaboration between Institute for Geotechnical Engineering, LUH, Germany and Department of Civil Engineering, IIT Delhi, India.
PY - 2019/6/17
Y1 - 2019/6/17
N2 - There are a number of offshore wind farms where the monopile is socketed into rock layers. Since it is socketed into rock, it may behave different from monopile embedded in soil. A numerical modelling of rock socketed monopile is done using finite element (FE) software Abaqus. A stiffness degradation method (SDM) is applied to FE model in order to predict the behaviour under cyclic loading conditions. Parametric studies are carried out by varying rock socketed depth (d), length of monopile below seabed (L), intensity of horizontal loading (H) and subsoil conditions to evaluate the long-term permanent deformation of offshore rock socketed monopile foundations. Suitable permanent deformation factors are proposed for offshore rock socketed monopiles for the first time in the literature. It is observed from the results that the deformation behaviour of the monopile changes from stiff to flexible with increase in rock socketing and in turn the pile head deflection going down. From the bending moment diagram, flexible and stiff behaviour of monopile can be identified and is an indicator of curvature of the deflection line of pile.
AB - There are a number of offshore wind farms where the monopile is socketed into rock layers. Since it is socketed into rock, it may behave different from monopile embedded in soil. A numerical modelling of rock socketed monopile is done using finite element (FE) software Abaqus. A stiffness degradation method (SDM) is applied to FE model in order to predict the behaviour under cyclic loading conditions. Parametric studies are carried out by varying rock socketed depth (d), length of monopile below seabed (L), intensity of horizontal loading (H) and subsoil conditions to evaluate the long-term permanent deformation of offshore rock socketed monopile foundations. Suitable permanent deformation factors are proposed for offshore rock socketed monopiles for the first time in the literature. It is observed from the results that the deformation behaviour of the monopile changes from stiff to flexible with increase in rock socketing and in turn the pile head deflection going down. From the bending moment diagram, flexible and stiff behaviour of monopile can be identified and is an indicator of curvature of the deflection line of pile.
KW - Cyclic loading
KW - Lateral deformation
KW - Numerical modelling
KW - Rock socketed monopiles
KW - Stiffness degradation method
UR - http://www.scopus.com/inward/record.url?scp=85101538640&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-95783-8_15
DO - 10.1007/978-3-319-95783-8_15
M3 - Conference contribution
AN - SCOPUS:85101538640
SN - 978-3-319-95782-1
T3 - Sustainable Civil Infrastructures
SP - 174
EP - 186
BT - Tunneling in Soft Ground, Ground Conditioning and Modification Techniques
A2 - Cheng, Wen-Chieh
A2 - Yang, Junsheng
A2 - Wang, Jinfeng
T2 - 5th GeoChina International Conference on Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, 2018
Y2 - 23 July 2018 through 25 July 2018
ER -