Abstract
Properly estimating strain-dependent shear stiffness of soils is necessary for accurate analysis of soil-structure interaction and seismic ground response problems during earthquake motions. In this research, an artificial neural network (ANN) model was developed for shear stiffness ratio of cohesionless soils. The input variables in this model are shear strain amplitude (γ), effective confining pressure (σ′ 0 ), mean grain size (D 50 ), and relative density (D r ) and output is shear stiffness ratio (G/G max ). A large experimental database was compiled from available published laboratory cyclic tests. Validation of model was carried out with using centrifuge tests results. Subsequently, sensitivity analysis and model accuracy was conducted. Finally, proposed model has been compared with other researcher’s relationships. The results clearly demonstrate the good performance and capability of the proposed ANN-based model.
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Abbreviations
- ANN:
-
Artificial neural network
- G:
-
Shear stiffness
- Gmax :
-
Shear stiffness at small strains
- G/Gmax :
-
Shear stiffness ratio
- D50 :
-
Mean grain size
- Dr :
-
Relative density
- σ′0 :
-
Effective confining pressure
- γ:
-
Shear strain amplitude
- e:
-
Void ratio
- R2 :
-
Coefficient of determination
- MAE:
-
Mean absolute error
- RMSE:
-
Root mean squared error
- Min.:
-
Minimum
- Max.:
-
Maximum
- S.D.:
-
Standard deviation
- N:
-
Number of data
- Xm :
-
Measured value
- Xp :
-
Predicted value
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Acknowledgements
This work has been financially supported by the research deputy of Shahrekord University. The Grant Number was 95GRN1M39422.
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Javdanian, H. Assessment of shear stiffness ratio of cohesionless soils using neural modeling. Model. Earth Syst. Environ. 3, 1045–1053 (2017). https://doi.org/10.1007/s40808-017-0351-7
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DOI: https://doi.org/10.1007/s40808-017-0351-7