https://orcid.org/0000-0003-1849-4857
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Abstract
As a new type of engineering construction filler, it is particularly important to know the shakedown and permanent deformation characteristics of the Yellow River silt under cyclic load. In this study, a series of undrained cyclic triaxial tests for Yellow River silt are carried out by using GDS triaxial apparatus, the effects of relative density, loading frequency, confining pressure and cyclic stress ratio on the development curve of permanent strain are explored. Based on the shakedown theory and combined with the data of permanent strain development curve of Yellow River silt at different stress levels, a calculation model for its critical dynamic stress and limit cyclic stress ratio under shakedown state is determined. Further analysis is conducted on the development law of the permanent strain curve of Yellow River silt under shakedown state, and a prediction model for permanent strain of Yellow River silt considering different parameters was established. Then the accuracy of the model is verified. Combining with splitting summation method, the settlement of foundation can be calculated.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Figure 8. Permanent strain development curves under different cyclic stress ratios.
Figure 9. Permanent strain development curves under different confining pressures.
Figure 10. Critical dynamic stress in shakedown range.
Figure 11. Limit cyclic stress ratio.
Figure 12. Permanent strain development curves under different loading frequencies.
