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Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses
In order to study the creep behavior of the surrounding rock of the interbedded rock mass tunnel considering the time-dependent deformation, this paper proposes a viscoelastic-plastic seven-element model considering the stress threshold, and derives and establishes its creep equation under three-dim...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673900/ https://www.ncbi.nlm.nih.gov/pubmed/38001162 http://dx.doi.org/10.1038/s41598-023-48003-w |
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author | Hu, Taotao He, Shaojun Kang, Zhibin Tu, Peng Wang, Dong |
author_facet | Hu, Taotao He, Shaojun Kang, Zhibin Tu, Peng Wang, Dong |
author_sort | Hu, Taotao |
collection | PubMed |
description | In order to study the creep behavior of the surrounding rock of the interbedded rock mass tunnel considering the time-dependent deformation, this paper proposes a viscoelastic-plastic seven-element model considering the stress threshold, and derives and establishes its creep equation under three-dimensional stress state. At the same time, the UMAT (User-defined Material) subroutine of the model is developed based on the ABAQUS software. The rationality of the seven-element model and the effectiveness of the subprogram are verified by rheological test results. Finally, the UMAT subroutine is applied to the numerical simulation of the creep behavior of soft and hard interbedded rock tunnels with different rock inclinations (α). The results show that the different rock inclination angles have different effects on the horizontal displacement of the ground above the tunnel, settlement deformation, and the convergence of the tunnel section. With the increase of the rock inclination (0 ≤ α ≤ 90°), the horizontal displacement of the surface on both sides is antisymmetric. When α is 0°, 45° and 90°, the horizontal displacement on both sides is equivalent. Surface subsidence decreases and then increases slowly. When α is 0° and 45°, the surface subsidence is the largest (12.4 mm) and the smallest (11.1 mm), respectively. The convergence values of the tunnel section change according to different parts of the tunnel. The convergence values of the arch top and arch bottom decrease continuously, and their maximum convergence values are 23.4 mm and 17.3 mm, respectively. The change trend of the arch waist and arch shoulder convergence values is the opposite. When α is 0°, the convergence value of the arch waist is maximum (3.5 mm). When α is 15°, the convergence value of the arch shoulder is the maximum (2.0 mm). |
format | Online Article Text |
id | pubmed-10673900 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-106739002023-11-24 Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses Hu, Taotao He, Shaojun Kang, Zhibin Tu, Peng Wang, Dong Sci Rep Article In order to study the creep behavior of the surrounding rock of the interbedded rock mass tunnel considering the time-dependent deformation, this paper proposes a viscoelastic-plastic seven-element model considering the stress threshold, and derives and establishes its creep equation under three-dimensional stress state. At the same time, the UMAT (User-defined Material) subroutine of the model is developed based on the ABAQUS software. The rationality of the seven-element model and the effectiveness of the subprogram are verified by rheological test results. Finally, the UMAT subroutine is applied to the numerical simulation of the creep behavior of soft and hard interbedded rock tunnels with different rock inclinations (α). The results show that the different rock inclination angles have different effects on the horizontal displacement of the ground above the tunnel, settlement deformation, and the convergence of the tunnel section. With the increase of the rock inclination (0 ≤ α ≤ 90°), the horizontal displacement of the surface on both sides is antisymmetric. When α is 0°, 45° and 90°, the horizontal displacement on both sides is equivalent. Surface subsidence decreases and then increases slowly. When α is 0° and 45°, the surface subsidence is the largest (12.4 mm) and the smallest (11.1 mm), respectively. The convergence values of the tunnel section change according to different parts of the tunnel. The convergence values of the arch top and arch bottom decrease continuously, and their maximum convergence values are 23.4 mm and 17.3 mm, respectively. The change trend of the arch waist and arch shoulder convergence values is the opposite. When α is 0°, the convergence value of the arch waist is maximum (3.5 mm). When α is 15°, the convergence value of the arch shoulder is the maximum (2.0 mm). Nature Publishing Group UK 2023-11-24 /pmc/articles/PMC10673900/ /pubmed/38001162 http://dx.doi.org/10.1038/s41598-023-48003-w Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Hu, Taotao He, Shaojun Kang, Zhibin Tu, Peng Wang, Dong Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title | Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title_full | Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title_fullStr | Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title_full_unstemmed | Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title_short | Establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
title_sort | establishment and engineering application of viscoelastic-plastic constitutive laws for creep modeling in interbedded rock masses |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673900/ https://www.ncbi.nlm.nih.gov/pubmed/38001162 http://dx.doi.org/10.1038/s41598-023-48003-w |
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