Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface
In order to ensure the long-term safety and stability of bridge pile foundations in permafrost regions, it is essential to investigate the rheological effects on both the pile tip and pile side bearing capacities. Among these, the consideration of the creep characteristics of the pile-frozen soil in...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:332562 2024-02-11T10:07:52+01:00 Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface LEI, W (via Mendeley Data) 2024-01-24T06:16:03.401Z http://nbn-resolving.org/urn:nbn:nl:ui:13-ki-jinz https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:332562 unknown 1 swt8b3z9zg http://nbn-resolving.org/urn:nbn:nl:ui:13-ki-jinz doi:10.17632/swt8b3z9zg.1 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:332562 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf WANYU LEI Interdisciplinary sciences 2024 ftdans https://doi.org/10.17632/swt8b3z9zg.1 2024-01-24T23:15:29Z In order to ensure the long-term safety and stability of bridge pile foundations in permafrost regions, it is essential to investigate the rheological effects on both the pile tip and pile side bearing capacities. Among these, the consideration of the creep characteristics of the pile-frozen soil interface is a key factor in determining the long-term stability of permafrost pile foundations. This study utilized a self-developed large stress-controlled shear apparatus to investigate the shear creep characteristics of the frozen Qinghai-Tibet silt and concrete interface. The study examined the influence of freezing temperatures (-1°C, -2°C, -5°C), contact surface roughness (0mm, 0.60mm, 0.75mm, 1.15mm), normal stress (50kPa, 100kPa, 150kPa), and shear stress on the creep characteristics of the contact surface. Incorporating the creep behavior and development trends of the contact surface, a creep constitutive model for the frozen Qinghai-Tibet silt-concrete interface was established based on the Nishihara model, introducing nonlinear elements and a damage factor.The results revealed significant creep effects on the frozen Qinghai-Tibet silt-concrete interface under constant load, with creep displacement approximately 2-15 times the instantaneous displacement, and a failure creep displacement ranging from 6mm to 8mm. Under different experimental conditions, the creep characteristics of the frozen Qinghai-Tibet silt-concrete interface varied. Larger roughness, lower freezing temperatures, and higher normal stresses resulted in longer sample attenuation creep time, smaller steady-state creep rate, greater long-term creep strength, and stronger creep stability. Building upon the Nishihara model, considering the influence of shear stress and time on the viscoelastic viscosity coefficient, and introducing a damage factor in viscoplasticity, the improved model effectively described the entire creep process of the frozen Qinghai-Tibet silt-concrete interface. The research findings provide theoretical support for the ... Other/Unknown Material permafrost Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
institution |
Open Polar |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Interdisciplinary sciences |
spellingShingle |
Interdisciplinary sciences LEI, W (via Mendeley Data) Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
topic_facet |
Interdisciplinary sciences |
description |
In order to ensure the long-term safety and stability of bridge pile foundations in permafrost regions, it is essential to investigate the rheological effects on both the pile tip and pile side bearing capacities. Among these, the consideration of the creep characteristics of the pile-frozen soil interface is a key factor in determining the long-term stability of permafrost pile foundations. This study utilized a self-developed large stress-controlled shear apparatus to investigate the shear creep characteristics of the frozen Qinghai-Tibet silt and concrete interface. The study examined the influence of freezing temperatures (-1°C, -2°C, -5°C), contact surface roughness (0mm, 0.60mm, 0.75mm, 1.15mm), normal stress (50kPa, 100kPa, 150kPa), and shear stress on the creep characteristics of the contact surface. Incorporating the creep behavior and development trends of the contact surface, a creep constitutive model for the frozen Qinghai-Tibet silt-concrete interface was established based on the Nishihara model, introducing nonlinear elements and a damage factor.The results revealed significant creep effects on the frozen Qinghai-Tibet silt-concrete interface under constant load, with creep displacement approximately 2-15 times the instantaneous displacement, and a failure creep displacement ranging from 6mm to 8mm. Under different experimental conditions, the creep characteristics of the frozen Qinghai-Tibet silt-concrete interface varied. Larger roughness, lower freezing temperatures, and higher normal stresses resulted in longer sample attenuation creep time, smaller steady-state creep rate, greater long-term creep strength, and stronger creep stability. Building upon the Nishihara model, considering the influence of shear stress and time on the viscoelastic viscosity coefficient, and introducing a damage factor in viscoplasticity, the improved model effectively described the entire creep process of the frozen Qinghai-Tibet silt-concrete interface. The research findings provide theoretical support for the ... |
author |
LEI, W (via Mendeley Data) |
author_facet |
LEI, W (via Mendeley Data) |
author_sort |
LEI, W (via Mendeley Data) |
title |
Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
title_short |
Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
title_full |
Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
title_fullStr |
Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
title_full_unstemmed |
Creep Experiment and Constitutive Model Study of the Frozen Qinghai-Tibet Silt-Concrete Interface |
title_sort |
creep experiment and constitutive model study of the frozen qinghai-tibet silt-concrete interface |
publishDate |
2024 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-ki-jinz https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:332562 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
1 swt8b3z9zg http://nbn-resolving.org/urn:nbn:nl:ui:13-ki-jinz doi:10.17632/swt8b3z9zg.1 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:332562 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf WANYU LEI |
op_doi |
https://doi.org/10.17632/swt8b3z9zg.1 |
_version_ |
1790606699964399616 |