| EPSRC Reference: |
GR/S29232/01 |
| Title: |
Non-Coaxial Plasticity Models for Soil-Structure Interaction |
| Principal Investigator: |
Yu, Professor HS |
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| Department: |
Sch of Civil Engineering |
| Organisation: |
University of Nottingham |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
10 November 2003 |
Ends: |
09 November 2006 |
Value (£): |
163,921
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Summary on Grant Application Form |
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Constitutive modelling of soils plays a key role in developing theoretical models for use in the analysis and design of geotechnical structures. Despite much research, mathematical modelling of the deformation and plastic flow of granular soils remains a key and challenging problem in soil mechanics and geotechnical engineering practice. In particular, almost all the plasticity models currently in use in soil mechanics assume that the principal axes of stress and plastic strain-rate are coincident (i.e. coaxial theory). However experimental research clearly shows that the coaxial theory is generally not correct, particularly for soils experiencing strong stress rotations. Limited theoretical research indicates that failing to account for such a stress and strain-rate non-coaxiality would lead to siginifcant errors in the results of many soil-structure interaction problems where stress rotations are known to be significant. Furthermore neglecting the non-coaxiality tends to overestimate significantly the limit load a soil structure can sustain, and if used directly in practice, may lead to an 'unsafe' design. In view of this unsatisfactory state of affairs, this project aims to develop a class of accurate and novel plasticity models for modelling plastic flow of granular materials based on non-coaxial theory. A numerical procedure will be developed by which the new soil models can be implemented into a finite element program. To validate the soil models, the numerical procedure will be applied to analyse two important soil-structure interaction problems (foundations and plate anchors), for which high quality experimental data is available for comparison.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.nottingham.ac.uk |