Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model
Several constitutive models had been developed by other researchers to cover the main features of mechanical behaviour of natural overconsolidated clays, such as the nonlinear stress–strain response at small and large strains, and the recent stress history effect. Kinematic hardening models include...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/2/880 |
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| author | Vojkan Jovičić Nina Jurečič Gregor Vilhar |
| author_facet | Vojkan Jovičić Nina Jurečič Gregor Vilhar |
| author_sort | Vojkan Jovičić |
| collection | DOAJ |
| description | Several constitutive models had been developed by other researchers to cover the main features of mechanical behaviour of natural overconsolidated clays, such as the nonlinear stress–strain response at small and large strains, and the recent stress history effect. Kinematic hardening models include these features to facilitate realistic predictions of soil–structure interaction. This paper presents the further development of a kinematic hardening model BRICK that includes anisotropy and the influence of soil structure on the mechanical behaviour of a natural clay. High quality laboratory tests were used to calibrate the input parameters of the model in a single element configuration, and a documented boundary value problem of tunnel excavation was used to validate the model in finite element calculations. A comprehensive comparative study between the predictions of different kinematic hardening models, using two different software packages, was carried out. It was observed that the SA_BRICK model is in fair agreement with the observed data and gives improved predictions in comparison to other kinematic hardening models, particularly in terms of narrowness of the settlement trough above the tunnel. Advanced predictions of ground deformations caused by tunnel excavations can be effectively used to mitigate possible damage of existing structures affected by tunnelling in an urban environment. |
| first_indexed | 2024-03-09T13:44:46Z |
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| id | doaj.art-f53e69a8f0fe4bf49266221a199b95f7 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T13:44:46Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f53e69a8f0fe4bf49266221a199b95f72023-11-30T21:02:50ZengMDPI AGApplied Sciences2076-34172023-01-0113288010.3390/app13020880Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK ModelVojkan Jovičić0Nina Jurečič1Gregor Vilhar2Faculty of Civil and Geodetic Engineering, University of Ljubljana, 1000 Ljubljana, SloveniaIRGO, Institute for Mining, Geotechnology and Environment, 1000 Ljubljana, SloveniaIRGO, Institute for Mining, Geotechnology and Environment, 1000 Ljubljana, SloveniaSeveral constitutive models had been developed by other researchers to cover the main features of mechanical behaviour of natural overconsolidated clays, such as the nonlinear stress–strain response at small and large strains, and the recent stress history effect. Kinematic hardening models include these features to facilitate realistic predictions of soil–structure interaction. This paper presents the further development of a kinematic hardening model BRICK that includes anisotropy and the influence of soil structure on the mechanical behaviour of a natural clay. High quality laboratory tests were used to calibrate the input parameters of the model in a single element configuration, and a documented boundary value problem of tunnel excavation was used to validate the model in finite element calculations. A comprehensive comparative study between the predictions of different kinematic hardening models, using two different software packages, was carried out. It was observed that the SA_BRICK model is in fair agreement with the observed data and gives improved predictions in comparison to other kinematic hardening models, particularly in terms of narrowness of the settlement trough above the tunnel. Advanced predictions of ground deformations caused by tunnel excavations can be effectively used to mitigate possible damage of existing structures affected by tunnelling in an urban environment.https://www.mdpi.com/2076-3417/13/2/880constitutive modellingnatural stiff clayskinematic hardeningnumerical analysestunnel excavations |
| spellingShingle | Vojkan Jovičić Nina Jurečič Gregor Vilhar Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model Applied Sciences constitutive modelling natural stiff clays kinematic hardening numerical analyses tunnel excavations |
| title | Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model |
| title_full | Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model |
| title_fullStr | Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model |
| title_full_unstemmed | Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model |
| title_short | Modelling the Structure and Anisotropy of London Clay Using the SA_BRICK Model |
| title_sort | modelling the structure and anisotropy of london clay using the sa brick model |
| topic | constitutive modelling natural stiff clays kinematic hardening numerical analyses tunnel excavations |
| url | https://www.mdpi.com/2076-3417/13/2/880 |
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