Combined loading of spudcan foundations on clay: laboratory tests
Recent research has shown that work-hardening plasticity theory provides a suitable framework for interpreting and predicting the load-displacement behaviour of rigid shallow foundations under combined vertical, moment and horizontal loading. Most previous work has, however, been restricted to footi...
| Asıl Yazarlar: | , |
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| Materyal Türü: | Journal article |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
Thomas Telford Services Ltd
2000
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| _version_ | 1826292671784681472 |
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| author | Martin, C Houlsby, G |
| author_facet | Martin, C Houlsby, G |
| author_sort | Martin, C |
| collection | OXFORD |
| description | Recent research has shown that work-hardening plasticity theory provides a suitable framework for interpreting and predicting the load-displacement behaviour of rigid shallow foundations under combined vertical, moment and horizontal loading. Most previous work has, however, been restricted to footings on granular soils. This paper describes a series of laboratory tests conducted at unit gravity using a small circular footing and specimens of reconstituted kaolin. The results indicate that work-hardening plasticity concepts can also be applied to the modelling of shallow foundation behaviour on undrained clay. The footing shape chosen for the experiments is representative of the 'spudcan' foundations which support the legs of jack-up drilling platforms. A novel testing apparatus allows independent control of the vertical, rotational and horizontal footing displacements within a single vertical plane. Tests conducted at constant vertical penetration are used to investigate the shape and size of the combined load yield surface at embedments ranging from 0 to 1·6 footing diameters. Tests under vertical load control provide further information about the yield surface, and are used to assess the suitability of an associated flow rule for predicting plastic footing displacements. The yield surface shape determined experimentally is compared with that implied by the general bearing capacity formula of Brinch Hansen, and some significant discrepancies are highlighted. |
| first_indexed | 2024-03-07T03:18:18Z |
| format | Journal article |
| id | oxford-uuid:b690f23b-0e6d-4313-8007-28ca7d1d06c7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:18:18Z |
| publishDate | 2000 |
| publisher | Thomas Telford Services Ltd |
| record_format | dspace |
| spelling | oxford-uuid:b690f23b-0e6d-4313-8007-28ca7d1d06c72022-03-27T04:41:50ZCombined loading of spudcan foundations on clay: laboratory testsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b690f23b-0e6d-4313-8007-28ca7d1d06c7EnglishSymplectic Elements at OxfordThomas Telford Services Ltd2000Martin, CHoulsby, GRecent research has shown that work-hardening plasticity theory provides a suitable framework for interpreting and predicting the load-displacement behaviour of rigid shallow foundations under combined vertical, moment and horizontal loading. Most previous work has, however, been restricted to footings on granular soils. This paper describes a series of laboratory tests conducted at unit gravity using a small circular footing and specimens of reconstituted kaolin. The results indicate that work-hardening plasticity concepts can also be applied to the modelling of shallow foundation behaviour on undrained clay. The footing shape chosen for the experiments is representative of the 'spudcan' foundations which support the legs of jack-up drilling platforms. A novel testing apparatus allows independent control of the vertical, rotational and horizontal footing displacements within a single vertical plane. Tests conducted at constant vertical penetration are used to investigate the shape and size of the combined load yield surface at embedments ranging from 0 to 1·6 footing diameters. Tests under vertical load control provide further information about the yield surface, and are used to assess the suitability of an associated flow rule for predicting plastic footing displacements. The yield surface shape determined experimentally is compared with that implied by the general bearing capacity formula of Brinch Hansen, and some significant discrepancies are highlighted. |
| spellingShingle | Martin, C Houlsby, G Combined loading of spudcan foundations on clay: laboratory tests |
| title | Combined loading of spudcan foundations on clay: laboratory tests |
| title_full | Combined loading of spudcan foundations on clay: laboratory tests |
| title_fullStr | Combined loading of spudcan foundations on clay: laboratory tests |
| title_full_unstemmed | Combined loading of spudcan foundations on clay: laboratory tests |
| title_short | Combined loading of spudcan foundations on clay: laboratory tests |
| title_sort | combined loading of spudcan foundations on clay laboratory tests |
| work_keys_str_mv | AT martinc combinedloadingofspudcanfoundationsonclaylaboratorytests AT houlsbyg combinedloadingofspudcanfoundationsonclaylaboratorytests |