Abstract
Modelling the soil-structure interface behaviour is an important but often neglected part of a holistic geotechnical modelling approach. The Mohr-Coulomb model, which is often used, is in many cases not a suitable choice to represent the complex phenomena taking place in the localized interface shear zone. Recently developed interface models formulated into the hypoplastic framework have demonstrated their ability to model the barotropy and pyknotropy in the interface shear zone. It is especially important for the models to consider the dependence of the interface shear zone on the initial void ratio to correctly simulate the changes in normal stress around cylindrical inclusions. This paper presents the results of a number of axisymmetric interface shear simulations using a hypoplastic interface and soil model. The simulation results are compared to experimental results obtained from axisymmetric interface shear tests performed between a medium dense sand and surfaces of varying roughness. The surfaces used in these experiments consisted of sheets of sandpaper glued on metal sleeves, and had average surface roughness values between 0.001 and 0.290 mm. The experimental and modelling results are compared considering the stress-deformation responses. Based on this assessment, recommendations are provided regarding the use of the hypoplastic interface shear models.
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Stutz, H.H., Martinez, A. (2018). Hypoplastic Simulation of Axisymmetric Interface Shear Tests in Granular Media. In: Wu, W., Yu, HS. (eds) Proceedings of China-Europe Conference on Geotechnical Engineering. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-97112-4_16
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DOI: https://doi.org/10.1007/978-3-319-97112-4_16
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