The behaviour of spudcan footings on clay subjected to combined cyclic loading
This paper presents an improved numerical 'force resultant model' for spudcan foundations that can be used within a structural analysis of a mobile drilling unit. The model incorporates hysteretic behaviour for pre-yield 'elastic' movements by using a hyperplasticity formulation...
| Հիմնական հեղինակներ: | , , |
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| Ձևաչափ: | Journal article |
| Լեզու: | English |
| Հրապարակվել է: |
2006
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| _version_ | 1826268373567143936 |
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| author | Vlahos, G Cassidy, M Byrne, B |
| author_facet | Vlahos, G Cassidy, M Byrne, B |
| author_sort | Vlahos, G |
| collection | OXFORD |
| description | This paper presents an improved numerical 'force resultant model' for spudcan foundations that can be used within a structural analysis of a mobile drilling unit. The model incorporates hysteretic behaviour for pre-yield 'elastic' movements by using a hyperplasticity formulation [Houlsby GT, Puzrin AM. Rate-dependent plasticity models derived from potential functions. Journal of Rheology 2002;46(1):113-26] for the moment-rotation response in the 'elastic' stiffness matrix. The formulation is embedded within an existing single surface plasticity model [Martin CM, Houlsby GT. Combined loading of spudcan foundations on clay: Numerical modelling. Géotechnique 2001;51(8):687-99] that would typically use linear elastic stiffness coefficients. The hyperplastic model has been calibrated against single footing tests carried out using a sophisticated three degree-of-freedom loading device at Oxford University. These loading tests were specific to the load paths experienced by spudcan foundations of large jack-ups in deep water. Further experimental work at the University of Western Australia involved applying monotonic and cyclic loading to a model three-legged jack-up [Vlahos G. Physical and numerical modelling of a three-legged jack-up structure on clay soil. Ph.D. thesis. Australia: University of Western Australia; 2004; Vlahos G, Martin CM, Prior MS, Cassidy MJ. Development of a model jack-up unit for the study of soil-structure interaction on clay. International Journal of Physical Modelling in Geomechanics 2005;5(2):31-48]. The experimental results from jack-up tests were compared to numerical simulations using a finite element model with the single surface plasticity foundation model incorporating (i) linear springs, and (ii) non-linear hyperplastic springs. The latter formulation showed an improved correlation with the experimental results. © 2006 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T21:08:42Z |
| format | Journal article |
| id | oxford-uuid:3d62dba1-91f6-4973-a8a9-a40e58195949 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:08:42Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:3d62dba1-91f6-4973-a8a9-a40e581959492022-03-26T14:19:04ZThe behaviour of spudcan footings on clay subjected to combined cyclic loadingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3d62dba1-91f6-4973-a8a9-a40e58195949EnglishSymplectic Elements at Oxford2006Vlahos, GCassidy, MByrne, BThis paper presents an improved numerical 'force resultant model' for spudcan foundations that can be used within a structural analysis of a mobile drilling unit. The model incorporates hysteretic behaviour for pre-yield 'elastic' movements by using a hyperplasticity formulation [Houlsby GT, Puzrin AM. Rate-dependent plasticity models derived from potential functions. Journal of Rheology 2002;46(1):113-26] for the moment-rotation response in the 'elastic' stiffness matrix. The formulation is embedded within an existing single surface plasticity model [Martin CM, Houlsby GT. Combined loading of spudcan foundations on clay: Numerical modelling. Géotechnique 2001;51(8):687-99] that would typically use linear elastic stiffness coefficients. The hyperplastic model has been calibrated against single footing tests carried out using a sophisticated three degree-of-freedom loading device at Oxford University. These loading tests were specific to the load paths experienced by spudcan foundations of large jack-ups in deep water. Further experimental work at the University of Western Australia involved applying monotonic and cyclic loading to a model three-legged jack-up [Vlahos G. Physical and numerical modelling of a three-legged jack-up structure on clay soil. Ph.D. thesis. Australia: University of Western Australia; 2004; Vlahos G, Martin CM, Prior MS, Cassidy MJ. Development of a model jack-up unit for the study of soil-structure interaction on clay. International Journal of Physical Modelling in Geomechanics 2005;5(2):31-48]. The experimental results from jack-up tests were compared to numerical simulations using a finite element model with the single surface plasticity foundation model incorporating (i) linear springs, and (ii) non-linear hyperplastic springs. The latter formulation showed an improved correlation with the experimental results. © 2006 Elsevier Ltd. All rights reserved. |
| spellingShingle | Vlahos, G Cassidy, M Byrne, B The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title | The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title_full | The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title_fullStr | The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title_full_unstemmed | The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title_short | The behaviour of spudcan footings on clay subjected to combined cyclic loading |
| title_sort | behaviour of spudcan footings on clay subjected to combined cyclic loading |
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