Investigating the Impact of Inhomogeneous Soil Parameters on Shear Strength in Biaxial Tests
Investigating the Impact of Inhomogeneous Soil Parameters on Shear Strength in Biaxial Tests
The creation of shear bands in soils is a complex and important geotechnical mechanism that is controlled by different factors, such as soil parameters, loading conditions and loading history. Understanding the development of shear bands is important in order to reliably predict the behaviour of soil in diverse engineering and geotechnical contexts, including slope stability, foundation design and earthworks. Therefore, this study simulates the effect of soil inhomogeneity on the peak shear strength in fine-meshed finite element biaxial tests by using the Hypoplasticity and Mohr-Coulomb constitutive model. For this purpose, hypoplastic calculations were carried out by distributing the initial void ratio with a normal distribution across all elements in a certain range. Similarly for Mohr-Coulomb models, equivalent cohesion, friction angle and elastic modulus were distributed among the elements. The results indicate that the presence of inhomogeneity leads to reaching the peaks strength at lower strain levels. Furthermore, increasing the inhomogeneity leads to a reduction in shear strength for both hypoplasticity and the Mohr-Coulomb model.
Mona Siahkouhi; Gertraud Medicus; Franz Tschuchnigg; B. Schneider-Muntau
28th European Young Geotechnical Engineers Conference (EYGEC2024)
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