Quasistaticity of the process of dynamic strain of soils
Mechanical characteristics of soil under static and dynamic strains are determined experimentally. Their accuracy and reliability depends on quasi-static nature of strain process in soil. The independence of experimental results on the wave processes is ensured. Laboratory devices of dynamic loading...
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Peter the Great St. Petersburg Polytechnic University
2019-02-01
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doaj-da1db22fb18d4bcfa5f6102fb1c26c972021-03-02T08:25:47ZengPeter the Great St. Petersburg Polytechnic UniversityИнженерно-строительный журнал2071-03052019-02-01851749410.18720/MCE.85.7Quasistaticity of the process of dynamic strain of soilsKarim Sultanov0Pavel Loginov1Sabida Ismoilova2Zulfiya Salikhova3Institute of Mechanics and Seismic Stability of Structures Academy of Sciences of the Republik of UzbekistanInstitute of Mechanics and Seismic Stability of Structures Academy of Sciences of the Republik of UzbekistanInstitute of Mechanics and Seismic Stability of Structures Academy of Sciences of the Republik of UzbekistanInstitute of Mechanics and Seismic Stability of Structures Academy of Sciences of the Republik of UzbekistanMechanical characteristics of soil under static and dynamic strains are determined experimentally. Their accuracy and reliability depends on quasi-static nature of strain process in soil. The independence of experimental results on the wave processes is ensured. Laboratory devices of dynamic loading (DDL) have been used to determine the laws of dynamic strain and mechanical characteristics of soil. The quasi-static nature of strain process in soil on DDL is achieved solving the wave problem corresponding to experiment. Plane wave propagation in soil is considered; its statement is adequate to experiment on DDL. To describe the dynamic strain of soil, the G.M. Lyakhov elastic-viscoplastic model has been adopted. The system of differential equations in partial derivatives of hyperbolic type, describing the wave process, has been solved by the method of characteristics and finite difference method in an implicit scheme. The changes in wave parameters over time for different sections of soil layer have been obtained by numerical solution. The effect of layer thickness on wave parameters and on quasi-static process is shown by experiments. Quantitative and qualitative influence of mechanical characteristics of soil on wave parameters is determined. Analyzing results, it has been established that the main factors determining the quasi-static process are the parameters of dynamic load and the thickness of soil layer in DDL. The dependence of mechanical characteristics of soil on quasistatic nature of dynamic strain in DDL is shown. Conditions to ensure the quasi-static process of strain in soil sample under dynamic compression on DDL are obtained.https://engstroy.spbstu.ru/en/article/2019.85.7/soildynamic loadingwavesstressesquasi-staticsmechanical characteristics of soil |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Karim Sultanov Pavel Loginov Sabida Ismoilova Zulfiya Salikhova |
spellingShingle |
Karim Sultanov Pavel Loginov Sabida Ismoilova Zulfiya Salikhova Quasistaticity of the process of dynamic strain of soils Инженерно-строительный журнал soil dynamic loading waves stresses quasi-statics mechanical characteristics of soil |
author_facet |
Karim Sultanov Pavel Loginov Sabida Ismoilova Zulfiya Salikhova |
author_sort |
Karim Sultanov |
title |
Quasistaticity of the process of dynamic strain of soils |
title_short |
Quasistaticity of the process of dynamic strain of soils |
title_full |
Quasistaticity of the process of dynamic strain of soils |
title_fullStr |
Quasistaticity of the process of dynamic strain of soils |
title_full_unstemmed |
Quasistaticity of the process of dynamic strain of soils |
title_sort |
quasistaticity of the process of dynamic strain of soils |
publisher |
Peter the Great St. Petersburg Polytechnic University |
series |
Инженерно-строительный журнал |
issn |
2071-0305 |
publishDate |
2019-02-01 |
description |
Mechanical characteristics of soil under static and dynamic strains are determined experimentally. Their accuracy and reliability depends on quasi-static nature of strain process in soil. The independence of experimental results on the wave processes is ensured. Laboratory devices of dynamic loading (DDL) have been used to determine the laws of dynamic strain and mechanical characteristics of soil. The quasi-static nature of strain process in soil on DDL is achieved solving the wave problem corresponding to experiment. Plane wave propagation in soil is considered; its statement is adequate to experiment on DDL. To describe the dynamic strain of soil, the G.M. Lyakhov elastic-viscoplastic model has been adopted. The system of differential equations in partial derivatives of hyperbolic type, describing the wave process, has been solved by the method of characteristics and finite difference method in an implicit scheme. The changes in wave parameters over time for different sections of soil layer have been obtained by numerical solution. The effect of layer thickness on wave parameters and on quasi-static process is shown by experiments. Quantitative and qualitative influence of mechanical characteristics of soil on wave parameters is determined. Analyzing results, it has been established that the main factors determining the quasi-static process are the parameters of dynamic load and the thickness of soil layer in DDL. The dependence of mechanical characteristics of soil on quasistatic nature of dynamic strain in DDL is shown. Conditions to ensure the quasi-static process of strain in soil sample under dynamic compression on DDL are obtained. |
topic |
soil dynamic loading waves stresses quasi-statics mechanical characteristics of soil |
url |
https://engstroy.spbstu.ru/en/article/2019.85.7/ |
work_keys_str_mv |
AT karimsultanov quasistaticityoftheprocessofdynamicstrainofsoils AT pavelloginov quasistaticityoftheprocessofdynamicstrainofsoils AT sabidaismoilova quasistaticityoftheprocessofdynamicstrainofsoils AT zulfiyasalikhova quasistaticityoftheprocessofdynamicstrainofsoils |
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1724240670072242176 |