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CALIBRATION OF AN ADVANCED SOIL CONSTITUTIVE MODEL FOR USE IN PROBABILISTIC NUMERICAL ANALYSIS

CALIBRATION OF AN ADVANCED SOIL CONSTITUTIVE MODEL FOR USE IN PROBABILISTIC NUMERICAL ANALYSIS,Radek Suchomel

CALIBRATION OF AN ADVANCED SOIL CONSTITUTIVE MODEL FOR USE IN PROBABILISTIC NUMERICAL ANALYSIS  
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In this paper, a horizontally stratified deposit of a sandy soil is analysed using a probabilistic approach. The mechanical behaviour of the soil is described by an advanced hypoplastic model for sand and by the basic Mohr-Coulomb model. The models are calibrated using an automated procedure based on a set of experimental data on forty specimens recovered from a quarry wall in a regular grid. It is shown that in order to describe the soil deposit properly using probabilistic approach, spatial variability of soil parameters (not state variables) needs to be considered. Experimental data also allowed us to quantify the spatial correlation structure (measured by the correlation length ), which is significantly higher in horizontal direction ( h = 242 m) than in vertical direction ( v = 5:1 m). The results may be used as an input into numerical methods based on random field theories.
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