Salyamova K.D.

Doctor of Engineering Sciences (Advanced Doctor), Professor, Institute of Mechanics and Seismic Stability of Structures of the Academy of Sciences of the Republic of Uzbekistan, Uzbekistan

NUMERICAL ANALYSIS OF EARTH DAM STRESS-STRAIN STATE UNDER SEISMIC IMPACT CONSIDERING THE WAVE DYNAMICS

https://doi.org/10.34031/2618-7183-2020-3-3-5-20
Abstract
The design, construction and operation of high-rise earth dams in seismic regions, such as the territory of the Republic of Uzbekistan, requires constant improvement of the methods to calculate them under various loads, both of a static nature (gravitational forces, hydrostatic, etc.), and of a dynamic nature, including seismic effects. Emergency situations at such facilities or their partial destruction under any impact can lead to disastrous aftermath. The aim of this study is to develop a mathematical statement and an algorithm for numerical solution to an unsteady-state problem for an earth dam in a plane elastic statement. To verify the proposed methodology and the corresponding complex of applied programs, a solution to the test problem was given (the Lamb’s problem). According to the developed methodology and algorithm based on numerical method of finite differences, the problem of studying the stress-strain state was solved under shear stress on the foundation (in the form of a seismogram) on the example of the high-rise Charvak earth dam located near Tashkent city. The solution is presented in the form of distribution lines of equal displacements, stresses along the dam body, depending on time. The most vulnerable zones of the earth dam under consideration were identified.
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NUMERICAL CALCULATION OF STRESS-STRAIN STATE OF EARTH DAM UNDER BASIC LOADS WITH ACCOUNT OF INHOMOGENEOUS FOUNDATION

https://doi.org/10.34031/2618-7183-2019-2-3-48-57
Abstract
Design, construction and operation of earth hydrotechnical structures located in seismic regions require a continuous improvement of computational methods for calculating various loads (static and dynamic ones). On the basis of the developed methodology and the complex of applied programs, an earth dam (Tupolang HPP) is calculated for the basic loads (gravity forces, hydrostatics) taking into account the design features and the actual physical and mechanical characteristics of soil both at the structure and at its earth foundation ( the height of the structure is 165m).The problem is solved in a plane elastic statement by the numerical finite element method. As the result of the calculation the isolines were obtained of equal displacements (horizontal and vertical), stresses (normal, tangential, principal) over the area occupied by the structure and its inhomogeneous foundation. A number of physical conclusions were made regarding the construction of important structures on an inhomogeneous earth foundation.
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