Assessment of stress-strain state of earth dams with allowance for non-linear strain of material and large strains

• Published in: Inzhenerno-stroitelʹnyĭ zhurnal Vol. 49; no. 5; p. 73
• Main Authors: Mirsaidov, M M, Sultanov, T Z
• Format: Journal Article
• Language: English; Russian
• Published: St. Petersburg St - Petersburg State Polytechnical University Faculty of Civil Engineering 01-07-2014; Peter the Great St. Petersburg Polytechnic University
• Subjects: Allowances; Civil engineering; Dams; dynamic behavior; Earth dams; heterogeneity; large strains; non-linear viscoelasticity; Nonlinear dynamics; Nonlinearity; Oscillations; resonance; Strain; Stress-strain curves; Stress-strain relationships; stress-strain state; Structural engineering; Viscoelasticity
• ISSN: 2071-4726; 2071-0305
• DOI: 10.5862/MCE.49.8

The paper presents results of studies on the dynamic behavior and stress-strain state of high earth dams with allowance for non-linearly viscoelastic properties of soil, large strains and heterogeneous features of a structure. The studies consider the effect of non-linearly viscoelastic properties of soil, large strains, heterogeneous character of a structure and geometrical parameters of a structure on the change of the stress-strain state of earth dams in pre-resonant, resonant and post-resonant modes of structure oscillations. As a result, some mechanical effects, occurring with allowance for the discussed factors in a dynamic mode of the structure operation, have been revealed. Consideration of large strains and heterogeneity of the structure leads to strengthening a stress jump between heterogeneous parts of the structure; consideration of non-linearly viscoelastic properties of the structure material in a resonant mode of oscillations decreases significantly the amplitude of displacements and amplitudes of stress intensity in dangerous (related to strength) points of a dam, comparing with a linearly elastic case.