| abstract | 第4页 |
| Chapter 1 Introduction | 第7-10页 |
| 1.1 Background | 第7-9页 |
| 1.2 Objectives of this study | 第9-10页 |
| Chapter 2 Review on Penetration Resistance of Conductor Casing | 第10-27页 |
| 2.1 Introduction | 第10-22页 |
| 2.1.1 Conductor shaft friction in cohesive soil | 第12-14页 |
| 2.1.2 The influence of strain rate on the undrained strength of clay | 第14-22页 |
| 2.1.2.1 Undrained shear strength | 第14-16页 |
| 2.1.2.2 Strain rate | 第16页 |
| 2.1.2.3 Influence of strain rate on undrained shear strength | 第16-22页 |
| 2.2 Experimental methods | 第22-23页 |
| 2.3 Numerical methods | 第23-27页 |
| 2.3.1 Spudcan penetration in clay by hossain & randolph (2009) | 第24-25页 |
| 2.3.2 The analysis procedure | 第25-27页 |
| Chapter 3 Finite Element Analysis Method of Casing Penetration | 第27-39页 |
| 3.1 Type and size of mesh | 第27页 |
| 3.2 Arbitrary Lagrangian-Eulerian Method (ALE) | 第27-33页 |
| 3.2.1 ALE adaptive meshing in ABAQUS | 第31页 |
| 3.2.2 Mesh smoothing | 第31-32页 |
| 3.2.3 Solution variable mapping | 第32-33页 |
| 3.3 Constitutive laws | 第33-37页 |
| 3.3.1 The soil model | 第33-35页 |
| 3.3.2 The soil material | 第35-37页 |
| 3.4 The conductor casing-soil interface element model | 第37-39页 |
| Chapter 4 Analysis of Conductor Casing Penetration and Result | 第39-74页 |
| 4.1 Geometry | 第39-40页 |
| 4.2 Material properties | 第40页 |
| 4.3 Mesh and element size | 第40-41页 |
| 4.4 Boundary conditions | 第41-43页 |
| 4.5 The interaction properties | 第43页 |
| 4.6 Load | 第43-45页 |
| 4.7 Results | 第45-74页 |
| 4.7.1 Effect of penetration displacement on the bearing capacity of clay | 第47-50页 |
| 4.7.2 Effect of penetration displacement on the bearing capacity of clay (explicit) | 第50-55页 |
| 4.7.3 Effect of the reaction force on penetration velocity | 第55-59页 |
| 4.7.4 Effect of vertical displacement on plastic strain | 第59-63页 |
| 4.7.5 Effect of vertical displacement on undrained shear strength | 第63-67页 |
| 4.7.6 Normalized undrained shear strength effect by casing displacement | 第67-70页 |
| 4.7.7 Strain rate effect on undrained shear strength | 第70-74页 |
| Chapter 5 Conclusion and Further Works | 第74-76页 |
| Appendices | 第76-97页 |
| A.1 Static Analysis | 第76-79页 |
| A.2 Explicit Analysis | 第79-82页 |
| A.3 Relationship between Reaction Force and Casing Velocity | 第82-85页 |
| A.4 Computed Plastic Strain Against Displacement | 第85-88页 |
| A.5 Undrained Shear Strength and Casing Displacement | 第88-91页 |
| A.6 Normalized Undrained Shear Strength and Casing Displacement | 第91-94页 |
| A.7 Strain Rate Effect on Undrained Shear Strength | 第94-97页 |
| Reference | 第97-101页 |
| Acknowledgements | 第101页 |
