Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load
Thawing landslide is a common geological disaster in permafrost regions, which seriously threatens the structural safety of oil and gas pipelines crossing permafrost regions. Most of the analytical methods have been used to calculate the longitudinal stress of buried pipelines. These analytical meth...
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ftdoajarticles:oai:doaj.org/article:ab8b91efe0264d23812e3dc5c0263e67 2023-05-15T17:57:34+02:00 Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load Beilei Ji Xiaoben Liu Dinaer Bolati Yue Yang Jinxu Jiang Yuqing Liu Hong Zhang 2021-09-01T00:00:00Z https://doi.org/10.3389/fenrg.2021.742348 https://doaj.org/article/ab8b91efe0264d23812e3dc5c0263e67 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fenrg.2021.742348/full https://doaj.org/toc/2296-598X 2296-598X doi:10.3389/fenrg.2021.742348 https://doaj.org/article/ab8b91efe0264d23812e3dc5c0263e67 Frontiers in Energy Research, Vol 9 (2021) thawing landslide buried pipelines longitudinal strain analytical method critical slumping displacement General Works A article 2021 ftdoajarticles https://doi.org/10.3389/fenrg.2021.742348 2022-12-31T12:54:43Z Thawing landslide is a common geological disaster in permafrost regions, which seriously threatens the structural safety of oil and gas pipelines crossing permafrost regions. Most of the analytical methods have been used to calculate the longitudinal stress of buried pipelines. These analytical methods are subjected to slope-thaw slumping load, and the elastic characteristic of the soil in a nonlinear interaction behavior is ignored. Also, these methods have not considered the real boundary at both ends of the slope. This study set out to introduce an improved analytical method to accurately analyze the longitudinal strain characteristics of buried pipelines subjected to slope-thaw slumping load. In this regard, an iterative algorithm was based on an ideal elastoplastic model in the pipeline-soil interaction. Based on field monitoring and previous finite element results, the accuracy of the proposed method was validated. Besides, a parametric analysis was conducted to study the effects of wall thickness, internal pressure, ultimate soil resistance, and slope angle on the maximum longitudinal strain of the pipeline. The results from the compression section showed that the pipeline is more likely to yield, indicating an actual situation in engineering. Moreover, the maximum longitudinal tensile and compression strain of pipelines decrease with increasing the wall thickness, internal pressure, ultimate resistance of soil, and slope angle. Finally, based on the pipeline limit state equations in CSA Z662-2007 and CRES which considered the critical compression factor comprehensively, the critical slumping displacements for both tensile and compressive strain failures were derived for reference. The research results attach great significance to the safety of pipeline under slope. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Frontiers in Energy Research 9 |
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thawing landslide buried pipelines longitudinal strain analytical method critical slumping displacement General Works A |
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thawing landslide buried pipelines longitudinal strain analytical method critical slumping displacement General Works A Beilei Ji Xiaoben Liu Dinaer Bolati Yue Yang Jinxu Jiang Yuqing Liu Hong Zhang Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
topic_facet |
thawing landslide buried pipelines longitudinal strain analytical method critical slumping displacement General Works A |
description |
Thawing landslide is a common geological disaster in permafrost regions, which seriously threatens the structural safety of oil and gas pipelines crossing permafrost regions. Most of the analytical methods have been used to calculate the longitudinal stress of buried pipelines. These analytical methods are subjected to slope-thaw slumping load, and the elastic characteristic of the soil in a nonlinear interaction behavior is ignored. Also, these methods have not considered the real boundary at both ends of the slope. This study set out to introduce an improved analytical method to accurately analyze the longitudinal strain characteristics of buried pipelines subjected to slope-thaw slumping load. In this regard, an iterative algorithm was based on an ideal elastoplastic model in the pipeline-soil interaction. Based on field monitoring and previous finite element results, the accuracy of the proposed method was validated. Besides, a parametric analysis was conducted to study the effects of wall thickness, internal pressure, ultimate soil resistance, and slope angle on the maximum longitudinal strain of the pipeline. The results from the compression section showed that the pipeline is more likely to yield, indicating an actual situation in engineering. Moreover, the maximum longitudinal tensile and compression strain of pipelines decrease with increasing the wall thickness, internal pressure, ultimate resistance of soil, and slope angle. Finally, based on the pipeline limit state equations in CSA Z662-2007 and CRES which considered the critical compression factor comprehensively, the critical slumping displacements for both tensile and compressive strain failures were derived for reference. The research results attach great significance to the safety of pipeline under slope. |
format |
Article in Journal/Newspaper |
author |
Beilei Ji Xiaoben Liu Dinaer Bolati Yue Yang Jinxu Jiang Yuqing Liu Hong Zhang |
author_facet |
Beilei Ji Xiaoben Liu Dinaer Bolati Yue Yang Jinxu Jiang Yuqing Liu Hong Zhang |
author_sort |
Beilei Ji |
title |
Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
title_short |
Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
title_full |
Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
title_fullStr |
Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
title_full_unstemmed |
Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
title_sort |
improved analytical method for longitudinal strain analysis of buried pipelines subjected to thaw slumping load |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fenrg.2021.742348 https://doaj.org/article/ab8b91efe0264d23812e3dc5c0263e67 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Energy Research, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fenrg.2021.742348/full https://doaj.org/toc/2296-598X 2296-598X doi:10.3389/fenrg.2021.742348 https://doaj.org/article/ab8b91efe0264d23812e3dc5c0263e67 |
op_doi |
https://doi.org/10.3389/fenrg.2021.742348 |
container_title |
Frontiers in Energy Research |
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9 |
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1766166034101829632 |