Calibration of cyclic soil degradation models through the discrete element method
Calibration of cyclic soil degradation models through the discrete element method
Cyclic soil degradation models are used to capture the undrained behaviour of soils subjected to cyclic loading. Under these conditions, a progressive variation of the soil strength can occur, eventually leading to soil liquefaction. These models require relationships between the degradation of the soil properties and the number of loading cycles which can be derived from controlled laboratory tests. Unfortunately, a large number of tests would be required to account for every parameter affecting the cyclic soil behaviour. On the other hand, the Discrete Element Method (DEM) offers an interesting approach to simulate the complex behaviour of an assembly of particles. This study deals with the potential use of the DEM to simulate cyclic undrained triaxial testing with the aim to derive soil damage relationships. Different grain-size distribution curves of sands are tested at different confining pressures with different axial strain levels. The effect of particle-size distribution on the results is examined and compared with published experimental cyclic triaxial tests. Laws to describe the random effects of the number of loading cycles on the strength are proposed.
M. Maksimovic; A. TOMBARI
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
2. Finite element, finite difference, discrete element, material point and other methods
https://doi.org/10.53243/NUMGE2023-142
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