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Application of non‐associative hierarchical model for geologic materials for active earth pressure experiment
Author(s) -
Ugai K.,
Desai C. S.
Publication year - 1995
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610190807
Subject(s) - constitutive equation , isotropy , lateral earth pressure , deformation (meteorology) , materials science , finite element method , geotechnical engineering , rod , hardening (computing) , mechanics , structural engineering , plane stress , geology , composite material , engineering , physics , medicine , alternative medicine , pathology , quantum mechanics , layer (electronics)
A non‐associative constitutive model in the hierarchical single surface (HISS) approach was used to characterize the simulated (geologic) materials in a retaining wall model test. The constitutive model was implemented in a finite element procedure to predict the experimental behaviour of the retaining wall under active earth pressure conditions. In the model test, the backfill was made of aluminium rods of 5 cm length with a mixture of 3 and 1·6 mm diameters. The wall was 48 cm high and loading was simulated by rotating the wall about its base. Bi‐axial compression tests were performed to obtain the strength and deformation constants of the backfill. The backfill was assumed to be an isotropic strain‐hardening cohesionless material under plane strain conditions which obeys the non‐associative δ 1 ‐model developed by Desai et al. 1 The results of the model test were predicted based on elastoplastic finite element calculations. Good agreements between predictions and experiments were shown for deformations of the backfill, and relations between active earth pressures and wall displacements.