ABSTRACT
Geotechnical numerical modelling has become a standard tool for analyzing complex geotechnical structures. However, determining small strain stiffness parameters presents challenges for engineers. The widely used HSSmall model requires estimation of the initial shear modulus (G0) and shear strain parameter (γ0.7), which significantly influence the behaviour. In this study, their impact was investigated on numerical modelling results using soil data from a site in Hungary. We compare the results of seismic CPT and MASW, which yielded slightly different results for shear wave velocity with depth. Plaxis 2D software is used to analyze the effects of parameters on different geotechnical structures. Additionally, we conduct a comprehensive parameter analysis to assess the influence of G0 and γ0.7. Our findings provide valuable insights into the significance of small strain stiffness parameters in geotechnical numerical modelling and highlight the need for accurate determination of these parameters for reliable predictions of structural behaviour. This research contributes to improving the understanding of the challenges associated with small strain stiffness parameters and their impact on numerical modelling and can aid geotechnical engineers in selecting appropriate parameter values for their projects.
