A Small-Strain Stiffness Model for Bio-Cemented Sands
A. Zhang (Université de Liège, TU Delft - Civil Engineering & Geosciences)
A.C. Dieudonné (TU Delft - Civil Engineering & Geosciences)
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Abstract
This study introduces a small-strain stiffness model for bio-cemented sands, building upon the existing small-strain stiffness model for sands proposed by Wichtmann and Triantafyllidis. The small-strain stiffness of numerical specimens, including sand specimens with different void ratios and bio-cemented specimens with different microscopic features, is evaluated using the discrete element method (DEM). The acquired DEM results are utilised to develop the small-strain stiffness model for bio-cemented sands. The proposed model is able to describe the small-strain stiffness of DEM bio-cemented sands. In particular, different contributions of carbonates in different distribution patterns to G0 enhancement can also be described by the proposed model.
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