Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model
Abstract There is extensive data to show that heating and cooling produces irrecoverable deformations in clays under fully drained conditions. The effects are most pronounced for normally and lightly overconsolidated clays that undergo significant compression. Most constitutive models...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131384 |
| _version_ | 1811083836481601536 |
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| author | Zymnis, Despina M Whittle, Andrew J Cheng, Xiaohui |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Zymnis, Despina M Whittle, Andrew J Cheng, Xiaohui |
| author_sort | Zymnis, Despina M |
| collection | MIT |
| description | Abstract
There is extensive data to show that heating and cooling produces irrecoverable deformations in clays under fully drained conditions. The effects are most pronounced for normally and lightly overconsolidated clays that undergo significant compression. Most constitutive models have key limitations for predicting the thermo-mechanical response of clays through long-term (seasonal) cycles of heating and cooling. The Tsinghua ThermoSoil model (TTS; Zhang and Cheng in Int J Numer Anal Methods Geomech 41(4):527–554, 2017) presents a novel theoretical framework for simulating the coupled thermo-mechanical response of clays. The model uses a double-entropy approach to capture effects of energy dissipation at the microscopic particulate contact level on continuum behavior. This paper proposes a simple procedure for calibrating input parameters and illustrates this process using recent laboratory data for Geneva Clay (Di Donna and Laloui in Eng Geol 190:65–76, 2015). We then investigate capabilities of the TTS model in simulating familiar aspects of thermal consolidation of clays as well as the long-term, progressive accumulation of strains associated with seasonal heating and cooling processes for shallow geothermal systems installed in clays. The model predicts the existence of a long-term steady-state condition where there is no further accumulation of strain. This state depends on the consolidation stress and stress history but is independent of the imposed range of temperature, Tcyc. However, the value of Tcyc does affect the rate of accumulation of strain with thermal cycles. Simulations for normally consolidated Geneva Clay find steady-state strain conditions ranged from 2.0 to 3.7% accumulating within N = 10–50 thermal cycles. |
| first_indexed | 2024-09-23T12:40:07Z |
| format | Article |
| id | mit-1721.1/131384 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:40:07Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1313842023-02-23T15:58:02Z Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model Zymnis, Despina M Whittle, Andrew J Cheng, Xiaohui Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Abstract There is extensive data to show that heating and cooling produces irrecoverable deformations in clays under fully drained conditions. The effects are most pronounced for normally and lightly overconsolidated clays that undergo significant compression. Most constitutive models have key limitations for predicting the thermo-mechanical response of clays through long-term (seasonal) cycles of heating and cooling. The Tsinghua ThermoSoil model (TTS; Zhang and Cheng in Int J Numer Anal Methods Geomech 41(4):527–554, 2017) presents a novel theoretical framework for simulating the coupled thermo-mechanical response of clays. The model uses a double-entropy approach to capture effects of energy dissipation at the microscopic particulate contact level on continuum behavior. This paper proposes a simple procedure for calibrating input parameters and illustrates this process using recent laboratory data for Geneva Clay (Di Donna and Laloui in Eng Geol 190:65–76, 2015). We then investigate capabilities of the TTS model in simulating familiar aspects of thermal consolidation of clays as well as the long-term, progressive accumulation of strains associated with seasonal heating and cooling processes for shallow geothermal systems installed in clays. The model predicts the existence of a long-term steady-state condition where there is no further accumulation of strain. This state depends on the consolidation stress and stress history but is independent of the imposed range of temperature, Tcyc. However, the value of Tcyc does affect the rate of accumulation of strain with thermal cycles. Simulations for normally consolidated Geneva Clay find steady-state strain conditions ranged from 2.0 to 3.7% accumulating within N = 10–50 thermal cycles. 2021-09-20T17:16:51Z 2021-09-20T17:16:51Z 2018-10-31 2020-09-24T21:05:27Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131384 en https://doi.org/10.1007/s11440-018-0726-6 Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ Springer-Verlag GmbH Germany, part of Springer Nature application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Zymnis, Despina M Whittle, Andrew J Cheng, Xiaohui Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title | Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title_full | Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title_fullStr | Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title_full_unstemmed | Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title_short | Simulation of long-term thermo-mechanical response of clay using an advanced constitutive model |
| title_sort | simulation of long term thermo mechanical response of clay using an advanced constitutive model |
| url | https://hdl.handle.net/1721.1/131384 |
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