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Article . 2019
Data sources: DOAJ
https://dx.doi.org/10.18720/mc...
Other literature type . 2019
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Spatial stress state and dynamic characteristics of earth dams

Пространственное напряженное состояние и динамические характеристики грунтовых плотин
Authors: Mirsaidov, Mirziyod; Toshmatov, Elyor;

Spatial stress state and dynamic characteristics of earth dams

Abstract

Оценка прочности грунтовых плотин, в основном, производится с использованием плоской расчетной схемы, которая не всегда приводит к адекватным результатам. В данной работе предлагается провести оценку напряженного состояния грунтовых плотин в трехмерной постановке. Следовательно, для оценки напряженно-деформированного состояния и динамических характеристик грунтовых плотин строятся соответствующие математические модели, методика и алгоритм. В основу разработанной методики при решении конкретных задач для пространственного сооружения заложен метод конечных элементов, метод Гаусса (или метод квадратного корня) и метод Мюллера. Достоверность полученных результатов проверена решением ряда тестовых задач. С помощью разработанной методики исследованы напряженно-деформированное состояние и динамические характеристики Гиссаракской и Сохской грунтовых плотин. На основе результатов исследования показано, что для некоторых типов грунтовых плотин, при предварительной оценке напряженного состояния и динамических характеристик сооружений, возможно использование плоско-деформируемой модели расчета. Проведенные исследования показали, что для обеспечения требуемой точности при оценке напряженного состояния и динамических характеристик сложных неоднородных пространственных систем (т.е. грунтовых плотин) необходимо проводить расчеты с использованием трехмерной модели. Полученные в результате исследований данные позволили выявить некоторые особенности напряженного состояния в пространственном случае, указывающие на возникающие опасные участки с наибольшими напряжениями, а также изучить характер собственных колебаний, которые невозможно описать использованием плоской модели.

Strength assessment of earth dams is mainly conducted using a plane design scheme, which does not always lead to adequate results. In this paper, it is proposed to assess the stress state of earth dams in a three-dimensional statement. Consequently, to assess the stress-strain state and dynamic characteristics of earth dams, appropriate mathematical models, methods and algorithms are built. The basis of the developed methods for solving specific problems for a spatial structure is a finite element method, the Gauss method (or the square root method) and the Muller method. Reliability of results is proved by solving a series of test problems. With the developed methods, the stress-strain state and dynamic characteristics of the Gissarak and Sokh earth dams were investigated. Based on the results of the study, it has been shown that for some types of earth dams, at preliminary assessment of the stress state and dynamic characteristics of structures, it is possible to use a plane-deformable model of calculation. Studies have shown that to ensure the required accuracy in assessing the stress state and dynamic characteristics of complex inhomogeneous spatial systems (such as earth dams), it is necessary to make calculations using a three-dimensional model. The data obtained as a result of research allowed to reveal some features of the stress state in a spatial case, indicating dangerous areas with the greatest stresses, as well as to study the pattern of natural oscillations that cannot be described using a plane model.

Keywords

Building construction, трехмерная (пространственная) модель, собственная частота и форма колебаний, modes of oscillations, dynamic characteristic, three-dimensional (spatial) model, Engineering (General). Civil engineering (General), напряженно-деформированное состояние, inhomogeneity, пространственная система, неоднородность, динамическая характеристика, spatial system, earth dam, stress-strain state, TA1-2040, natural frequency, грунтовая плотина, TH1-9745

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Top 10%
Average
Average