EGEL
Energy GeoEngineering Laboratory

Paper - Song-Hun Sands repetitive loading

Sands subjected to repetitive vertical loading under zero lateral strain: accumulation models, terminal densities, and settlement

Chong, SH; Santamarina, J.C​ (2016). "Sands subjected to repetitive vertical loading under zero lateral strain: accumulation models, terminal densities, and settlement​".  Canadian Geotechnical Journal​​​​
Chong, SH; Santamarina, J.C
long-term soil response, drained repetitive loads under zero lateral strain
2016
Geosystems often experience numerous loading cycles. Plastic strain accumulation during repetitive mechanical loads
can lead to shear shakedown or continued shear ratcheting; in all cases, volumetric strains diminish as the specimen evolves
towards terminal density. Previously suggested models and new functions are identified to fit plastic strain accumulation data.
All accumulation models are formulated to capture terminal density (volumetric strain) and either shakedown or ratcheting
(shear strain). Repetitive vertical loading tests under zero lateral strain conditions are conducted using three different sands
packed at initially low and high densities. Test results show that plastic strain accumulation for all sands and density conditions
can be captured in the same dimensionless plot defined in terms of the initial relative density, terminal density, and ratio between the
amplitude of the repetitive load and the initial static load. This observation allows us to advance a simple but robust procedure to
estimate the maximum one-dimensional settlement that a foundation could experience if subjected to repetitive loads.