Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Three dimensional finite element modeling for the spudcan penetration into clayey seabed
Download
index.pdf
Date
2015
Author
Emren, Volkan
Metadata
Show full item record
Item Usage Stats
109
views
154
downloads
Cite This
The penetration of the foundation for “jack-up rig” type offshore oil platform (spudcan) into a uniform clayey seabed is studied with three dimensional finite element modeling (Abaqus 6.14) using Coupled Eulerian Lagrangian method. Although there exists some analytical methods (InSafeJIP etc.) for the calculation of the spudcan bearing capacity, they frequently underestimate or overestimate the bearing capacity due to simplifications involved. For the spudcan geometry and soil properties used in this study, based on the 3D FEM analyses, the required penetration depth for a target bearing capacity of spudcans can be reduced by 2 to 4 m. Rate of increase of the bearing capacity with depth is larger in 3D FEM analyses as compared to InSafeJIP method, which may also result in significant savings, however this finding is limited for the spudcan geometry and soil properties used in this study. A systematic parametric study is conducted for the variables that affect the spudcan penetration resistance. These parameters were spudcan diameter (7.5 to 15 m), spudcan cone angle (90 to 150 degrees), roughness of spudcan surface (roughness coefficient of 0 to 1.0), undrained shear strength of clay (20 to 80 kPa), spudcan penetration depths (3 to 20 m), and the spacing between two adjacent spudcans (spacing/diameter ratio of 1.5 to 3.0). Based on these results, spudcan size, cone tip angle etc. can be selected, for each case, to provide required penetration resistance and/or to reduce the required penetration depth. Understanding the relations between the factors and penetration resistance based on this study, may provide a significant step in enhancing the safe and economical design and successful penetration operation of spudcans. However, it should not be forgotten that, the key is to have extensive and correct information and interpretation about the subsoil profile and material properties.
Subject Keywords
Drilling platforms.
,
Offshore structures.
,
Ocean bottom.
,
Finite element method.
,
Offshore structures
URI
http://etd.lib.metu.edu.tr/upload/12618905/index.pdf
https://hdl.handle.net/11511/24763
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Üç Boyutlu Sonlu Elemanlar Yöntemi ile Açık Deniz Platform Temellerinin Killi Zemine Penetrasyonu
Emren, Volkan; Huvaj Sarıhan, Nejan; Tuncay, Kağan (null; 2016-10-13)
In this study the penetration of spudcan foundation for “jack-up rig” type offshore oil platform into a uniform clayey seabed is investigated with three-dimensional finite element modeling (Abaqus 6.14) using coupled Eulerian-Lagrangian method that can handle large strain problems. One of the goals of this study is to compare the penetration-bearing resistance behavior of spudcan obtained by numerical study with the method suggested in InSafeJIP design guideline. For the spudcan geometry and soil properties...
Data Base Development for Drilling Bit Selection
Kök, Mustafa Verşan; Akın, Serhat (Informa UK Limited, 2007-12-27)
Drilling bit optimization is one of the key concepts in drilling engineering. It is considered as one of the economical factors in an overall well budget. Computers are strictly used as decision-making systems in the optimization calculations. Formation parameters are easily processed according to drilling bit selection criteria by the help of computer programs. Although the computer program is an interface by which the user makes the computer do some jobs, the database is another important part of this dec...
Optimisation of Tension Leg Platform with Wind Turbine for the selected Region in UK
Oğuz, Elif; Khorasanchi, Mahdi (2014-07-09)
Tension Leg Platforms (TLP) have started to become popular structures both in offshore oil extraction and wind energy sectors. A challenging topic in this field has arisen by the adoption of TLP based wind turbines (TLPWT) into intermediate water depths. In this study, a TLPWT has been geometrically optimized for the coordinates of 03°E 56°N offshore of UK in the North Sea. Focused on the exciting wave forces, an optimization has been carried out to find out the geometrical shape yielding least wave forces ...
Three-Dimensional Finite Element Modeling for Spudcan Penetration into a Clayey Seabed
Emren, Volkan; Huvaj Sarıhan, Nejan; Tuncay, Kağan (2017-03-15)
In this study the penetration of spudcan foundation for "jack-up rig" type offshore oil platform into a uniform clayey seabed is investigated with three-dimensional finite element modeling (Abaqus 6.14) using Coupled Eulerian Lagrangian method that can handle large deformation problems. One of the goals of this study is to compare the penetration-bearing resistance behavior of spudcan obtained by numerical study with the method suggested in InSafeJIP design guideline. For the spudcan geometry and soil prope...
Integrated risk management applications in offshore windfarm construction
Sümer, Tuba Pelin; Duran, Serhan; Department of Industrial Engineering (2011)
This thesis is motivated by a construction company whose main business operation is foundation installations of offshore wind farm projects. Steel is the main input for most of the foundations. This construction company is confronted with price risk when involved in the procurement part of the foundations. The company receives a fixed payment for the project while paying variable raw material costs which depend on the steel spot price on the procurement date. The construction company should use financial ma...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
V. Emren, “Three dimensional finite element modeling for the spudcan penetration into clayey seabed,” M.S. - Master of Science, Middle East Technical University, 2015.