Stress-strain state of earth dam under harmonic effect

Bakhtiyar Khusanov,Ozodakhon Khaydarova,A Volkov,A Pustovgar,T Sultanov,A Adamtsevich

doi:10.1051/e3sconf/20199705043

Bakhtiyar Khusanov, Ozodakhon Khaydarova + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/20199705043

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Abstract

Stress-strain state of earth dams under the effect of harmonic (seismic) load from the base of the dam is numerically studied in the paper. Rock fill dam has good culvert properties and its water saturation is considered to have no effect on mechanical characteristics and strength properties of rock; filtration flow mainly forms on the low-permeable core of the dam. Usually, the dam core consists of soft (loess) soil, therefore its water saturation significantly influences physical and mechanical properties of soil. A two-dimensional problem is considered for the cross section of a dam using the equation of state with allowance for structural changes in rock fill and moisture content of a dam core with low-permeable trapezium properties. For earth dams, as is known, a filtration flow is formed in the dam body. The problem is solved numerically - by the method of finite differences. The results are presented in the form of graphs and are analyzed.

Highlights

Stress-strain state of earth dams under the effect of harmonic load from the base of the dam is numerically studied in the paper
The design and operation of earth dams located in seismic regions requires researchers to predict the dynamic behavior of these dams for various dynamic and seismic effects
Considering soil as a two-phase medium, these studies take into account the water saturation of soil

Summary

Introduction

Stress-strain state of earth dams under the effect of harmonic (seismic) load from the base of the dam is numerically studied in the paper. Dynamic methods for calculating earth dams, taking into account the wave nature of seismic effects, have been developed by many authors [1,2]. In [3,4], a dynamic method for calculating earth dams, with account of plastic and other soil properties, is developed and non-stationary problems are solved [5,6]. Taking the acting effect on the entire lower surface of earth structure from the base, the system of equations in the Eulerian representation is integrated numerically by the finite difference method, including the equations of motion, continuity and the Cauchy relation for the soil structure: equations of motion dvx dt xx x xy y. The equations of state for shear strain of rock fill are taken in the form [7,8,9]: under loading dP dt

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