Soil longitudinal variation effects on seismic behavior of buried pipelines

The purpose of this study is to investigate the behavior of continuous pipeline passing through two different layers of soil with different levels of resistance under displacement time-histories of the same earthquake. The values of stress and displacement are studied for different angles between pi...

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Autores principales:	Farnaz Fadaei, Nemat Hassani, Hamid Saffari
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	buried pipeline earthquake displacement time-history record pipeline intersection finite element method Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/08b0087f89b54960a40e31aae69af99c
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id	oai:doaj.org-article:08b0087f89b54960a40e31aae69af99c
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spelling	oai:doaj.org-article:08b0087f89b54960a40e31aae69af99c2021-11-08T15:51:46ZSoil longitudinal variation effects on seismic behavior of buried pipelines2476-39772538-261610.22065/jsce.2018.108454.1391https://doaj.org/article/08b0087f89b54960a40e31aae69af99c2019-12-01T00:00:00Zhttps://www.jsce.ir/article_61777_f8db12262b8f1bd3d2834e2cce440bb5.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The purpose of this study is to investigate the behavior of continuous pipeline passing through two different layers of soil with different levels of resistance under displacement time-histories of the same earthquake. The values of stress and displacement are studied for different angles between pipe and interface of soil layers. To this end, pipe and the surrounding soil are modeled using shell and solid elements, respectively, in ABAQUS Software. Stress and displacement values are calculated along the intersection and for different values of intersection angle between soil layer and pipeline and different values of Young's modulus of the soils. These evaluations indicate that, the maximum stress along the pipeline occurs at the node in certain distance before the interface in the harder soil. Moreover, with increasing the angle, the resulting displacement increases, and the value of stress increases with angles up to 30˚, beyond which angle it decreases. Also, a decrease in the ratio of Young's modulus increases the stress both before and after the interface. Significant changes are observed in displacement and stress along the pipeline with changing the pipe thickness, so that a decrease in the pipe thickness in the studied model from 20 to 15 mm (33% reduction) results in some 15% increase in the stress. Soft soil (two-layered soft soil) increases pipe displacement and response capacity in every condition.Farnaz FadaeiNemat HassaniHamid SaffariIranian Society of Structrual Engineering (ISSE)articleburied pipelineearthquakedisplacement time-history recordpipeline intersectionfinite element methodBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss 4, Pp 23-37 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	buried pipeline earthquake displacement time-history record pipeline intersection finite element method Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	buried pipeline earthquake displacement time-history record pipeline intersection finite element method Bridge engineering TG1-470 Building construction TH1-9745 Farnaz Fadaei Nemat Hassani Hamid Saffari Soil longitudinal variation effects on seismic behavior of buried pipelines
description	The purpose of this study is to investigate the behavior of continuous pipeline passing through two different layers of soil with different levels of resistance under displacement time-histories of the same earthquake. The values of stress and displacement are studied for different angles between pipe and interface of soil layers. To this end, pipe and the surrounding soil are modeled using shell and solid elements, respectively, in ABAQUS Software. Stress and displacement values are calculated along the intersection and for different values of intersection angle between soil layer and pipeline and different values of Young's modulus of the soils. These evaluations indicate that, the maximum stress along the pipeline occurs at the node in certain distance before the interface in the harder soil. Moreover, with increasing the angle, the resulting displacement increases, and the value of stress increases with angles up to 30˚, beyond which angle it decreases. Also, a decrease in the ratio of Young's modulus increases the stress both before and after the interface. Significant changes are observed in displacement and stress along the pipeline with changing the pipe thickness, so that a decrease in the pipe thickness in the studied model from 20 to 15 mm (33% reduction) results in some 15% increase in the stress. Soft soil (two-layered soft soil) increases pipe displacement and response capacity in every condition.
format	article
author	Farnaz Fadaei Nemat Hassani Hamid Saffari
author_facet	Farnaz Fadaei Nemat Hassani Hamid Saffari
author_sort	Farnaz Fadaei
title	Soil longitudinal variation effects on seismic behavior of buried pipelines
title_short	Soil longitudinal variation effects on seismic behavior of buried pipelines
title_full	Soil longitudinal variation effects on seismic behavior of buried pipelines
title_fullStr	Soil longitudinal variation effects on seismic behavior of buried pipelines
title_full_unstemmed	Soil longitudinal variation effects on seismic behavior of buried pipelines
title_sort	soil longitudinal variation effects on seismic behavior of buried pipelines
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/08b0087f89b54960a40e31aae69af99c
work_keys_str_mv	AT farnazfadaei soillongitudinalvariationeffectsonseismicbehaviorofburiedpipelines AT nemathassani soillongitudinalvariationeffectsonseismicbehaviorofburiedpipelines AT hamidsaffari soillongitudinalvariationeffectsonseismicbehaviorofburiedpipelines
_version_	1718441632957726720

Soil longitudinal variation effects on seismic behavior of buried pipelines

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