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Deformability of water-saturated sands under cyclic loads
Conclusions 1. The additional plastic deformation in water-saturated sand under cyclic loading with a constant frequency increases nonlinearly with increase of the amplitude of the load and total value of the acting stress and decreases with increase of preliminary static compression. 2. Secondary plasticity strains substantially depend on the initial sand density: in sands of average density and dense sands there exist critical parameters of the cyclic action, exceeding of which leads to the occurrence of secondary plasticity strains (additional to the strains during single loading); in loose sands, practically any cyclic action leads to the occurrence of additional strains. 3. The amplitude of the vector of the cyclic load (in the plane of the invariants of the stress tensor, equal to √σA2+σ1A2), leading to the occurrence of secondary plasticity strains, in addition to the dependence on the initial sand density, is proportional to the vector of the static stress state (equal to √$ p^{2} $+$ q^{2} $) and depends on the degree of approach to the limit state ($ σ_{i} $/$ σ_{i} $*).
Deformability of water-saturated sands under cyclic loads
Conclusions 1. The additional plastic deformation in water-saturated sand under cyclic loading with a constant frequency increases nonlinearly with increase of the amplitude of the load and total value of the acting stress and decreases with increase of preliminary static compression. 2. Secondary plasticity strains substantially depend on the initial sand density: in sands of average density and dense sands there exist critical parameters of the cyclic action, exceeding of which leads to the occurrence of secondary plasticity strains (additional to the strains during single loading); in loose sands, practically any cyclic action leads to the occurrence of additional strains. 3. The amplitude of the vector of the cyclic load (in the plane of the invariants of the stress tensor, equal to √σA2+σ1A2), leading to the occurrence of secondary plasticity strains, in addition to the dependence on the initial sand density, is proportional to the vector of the static stress state (equal to √$ p^{2} $+$ q^{2} $) and depends on the degree of approach to the limit state ($ σ_{i} $/$ σ_{i} $*).
Deformability of water-saturated sands under cyclic loads
Zaretskii, Yu. K. (author) / Vorontsov, É. I. (author) / Baizakov, A. A. (author)
1991
Article (Journal)
English
Local classification TIB:
770/6545/8000
BKL:
56.20
Ingenieurgeologie, Bodenmechanik
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