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• W4378839425 startingPage "103906" @default.
• W4378839425 abstract "Various experiments and computational methods have been conducted to describe the mechanical behaviours of frozen soils. However, due to high nonlinearity and uncertainty of responses, modelling the stress-strain behaviours of frozen soils remains challenging. Accordingly, we first propose a novel data-driven method based on Long Short-Term Memory (LSTM) to model the mechanical responses of frozen soil. A compiled database on the stress-strain of a frozen silty sandy soil is employed to feed into the LSTM model, where the mechanical behaviours under various temperatures and confining pressures are measured through triaxial tests. Subsequently, uncertainty of the stress-strain relations (i.e., deviatoric stress and volumetric strain to axial strain) is investigated and considered in LSTM-based modelling with Monte Carlo dropout (LSTM-MCD). Results demonstrate that the LSTM model without uncertainty can capture the stress-strain responses of the frozen soil with considerable predictive accuracy. Uncertainty analysis from LSTM-MCD reveals that the model with uncertainty can be applied to evaluate the mechanical responses of frozen soil with 95% confidence intervals. This study sheds light on the advantage of the data-driven model with uncertainty in predicting mechanical behaviours of frozen soils and provides references for permafrost construction." @default.
• W4378839425 created "2023-06-01" @default.
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• W4378839425 date "2023-05-01" @default.
• W4378839425 modified "2023-09-30" @default.
• W4378839425 title "A data-driven method to model stress-strain behaviour of frozen soil considering uncertainty" @default.
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• W4378839425 doi "https://doi.org/10.1016/j.coldregions.2023.103906" @default.
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