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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crfrontiers:10.3389/fenrg.2021.742348 2024-02-11T10:07:52+01:00 Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load Ji, Beilei Liu, Xiaoben Bolati, Dinaer Yang, Yue Jiang, Jinxu Liu, Yuqing Zhang, Hong Beijing Municipal Natural Science Foundation Science Foundation of China University of Petroleum, Beijing 2021 http://dx.doi.org/10.3389/fenrg.2021.742348 https://www.frontiersin.org/articles/10.3389/fenrg.2021.742348/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Energy Research volume 9 ISSN 2296-598X Economics and Econometrics Energy Engineering and Power Technology Fuel Technology Renewable Energy, Sustainability and the Environment journal-article 2021 crfrontiers https://doi.org/10.3389/fenrg.2021.742348 2024-01-26T10:05:05Z 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 Frontiers (Publisher) Frontiers in Energy Research 9 |
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Frontiers (Publisher) |
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Economics and Econometrics Energy Engineering and Power Technology Fuel Technology Renewable Energy, Sustainability and the Environment |
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Economics and Econometrics Energy Engineering and Power Technology Fuel Technology Renewable Energy, Sustainability and the Environment Ji, Beilei Liu, Xiaoben Bolati, Dinaer Yang, Yue Jiang, Jinxu Liu, Yuqing Zhang, Hong Improved Analytical Method for Longitudinal Strain Analysis of Buried Pipelines Subjected to Thaw Slumping Load |
topic_facet |
Economics and Econometrics Energy Engineering and Power Technology Fuel Technology Renewable Energy, Sustainability and the Environment |
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. |
author2 |
Beijing Municipal Natural Science Foundation Science Foundation of China University of Petroleum, Beijing |
format |
Article in Journal/Newspaper |
author |
Ji, Beilei Liu, Xiaoben Bolati, Dinaer Yang, Yue Jiang, Jinxu Liu, Yuqing Zhang, Hong |
author_facet |
Ji, Beilei Liu, Xiaoben Bolati, Dinaer Yang, Yue Jiang, Jinxu Liu, Yuqing Zhang, Hong |
author_sort |
Ji, Beilei |
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 SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fenrg.2021.742348 https://www.frontiersin.org/articles/10.3389/fenrg.2021.742348/full |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Energy Research volume 9 ISSN 2296-598X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fenrg.2021.742348 |
container_title |
Frontiers in Energy Research |
container_volume |
9 |
_version_ |
1790606700946915328 |