Reference number : GC-2017-Q4-00467, amendment number : , agreement type : G, recipient legal name : Dhar, Ashutosh (Memorial University of Newfoundland), recipient country : CA, recipient province : nan, recipient city : Newfoundland and Labrador|Terre-Neuve-et-Labrador, recipient postal code : nan, program name english : Collaborative Research and Development Grants - Project, program name french : Subventions de recherche et développement coopérative - projet, program purpose english : Pipelines play an important role in modern society through transporting liquids and gases from the source to the_x000D_
users. According to Natural Resources Canada, about 825,000 kilometers of oil and gas transmission, gathering_x000D_
and distribution pipelines traverse Canada. Many of these pipelines pass through the areas prone to landslides._x000D_
Soil movement due to landslides may cause longitudinal, transverse or combined loads on the pipelines,_x000D_
depending upon the orientation of the pipeline with respect to the moving ground. The existing design_x000D_
guidelines for structural integrity assessment of pipelines in landslide areas were developed based on the_x000D_
observations for rigid pipes, which may not be applicable to flexible pipes, such as Medium Density_x000D_
Polyethylene (MDPE) pipes. However, flexible polyethylene pipes including MDPE pipes have been widely_x000D_
used over the last few decades due to their various advantages. The design method for the assessment of the_x000D_
performance of MDPE pipelines subjected to landslide loading is not well-developed. Full-scale tests and finite_x000D_
element (FE) modelling of MDPE are also very limited. In the proposed research, a set of full-scale tests of_x000D_
small diameter MDPE pipe will be conducted using the facility at Memorial University of Newfoundland_x000D_
(MUN) to develop a database and an improved understanding on the behaviour of pipes under the loads from_x000D_
ground movements. The test program will consists of following: i) axial pullout testing of plane pipes; ii) axial_x000D_
pullout testing of pipes with Tee-junctions (branched pipes); and iii) lateral pullout testing for pipes, buried in_x000D_
loose and dense sand. Laboratory element testing will be conducted to find geotechnical parameters and_x000D_
development of constitutive models for sand and the strain rate dependent behavior of MDPE pipe materials._x000D_
FE modelling techniques will be developed using Abaqus FE software to simulate the observed response from_x000D_
the full-scale pipe tests. The findings from this research will be useful to the Canadian pipeline industry,_x000D_
enabling them to assess pipeline conditions in unstable ground and thus to make more effective management_x000D_
decisions to ensure structural integrity of the pipeline and minimize the risk of pipeline failure., program purpose french : Pipelines play an important role in modern society through transporting liquids and gases from the source to the_x000D_
users. According to Natural Resources Canada, about 825,000 kilometers of oil and gas transmission, gathering_x000D_
and distribution pipelines traverse Canada. Many of these pipelines pass through the areas prone to landslides._x000D_
Soil movement due to landslides may cause longitudinal, transverse or combined loads on the pipelines,_x000D_
depending upon the orientation of the pipeline with respect to the moving ground. The existing design_x000D_
guidelines for structural integrity assessment of pipelines in landslide areas were developed based on the_x000D_
observations for rigid pipes, which may not be applicable to flexible pipes, such as Medium Density_x000D_
Polyethylene (MDPE) pipes. However, flexible polyethylene pipes including MDPE pipes have been widely_x000D_
used over the last few decades due to their various advantages. The design method for the assessment of the_x000D_
performance of MDPE pipelines subjected to landslide loading is not well-developed. Full-scale tests and finite_x000D_
element (FE) modelling of MDPE are also very limited. In the proposed research, a set of full-scale tests of_x000D_
small diameter MDPE pipe will be conducted using the facility at Memorial University of Newfoundland_x000D_
(MUN) to develop a database and an improved understanding on the behaviour of pipes under the loads from_x000D_
ground movements. The test program will consists of following: i) axial pullout testing of plane pipes; ii) axial_x000D_
pullout testing of pipes with Tee-junctions (branched pipes); and iii) lateral pullout testing for pipes, buried in_x000D_
loose and dense sand. Laboratory element testing will be conducted to find geotechnical parameters and_x000D_
development of constitutive models for sand and the strain rate dependent behavior of MDPE pipe materials._x000D_
FE modelling techniques will be developed using Abaqus FE software to simulate the observed response from_x000D_
the full-scale pipe tests. The findings from this research will be useful to the Canadian pipeline industry,_x000D_
enabling them to assess pipeline conditions in unstable ground and thus to make more effective management_x000D_
decisions to ensure structural integrity of the pipeline and minimize the risk of pipeline failure., agreement title english : Investigation of pull-out behaviour of small diameter medium density polyethylene pipes, agreement title french : Investigation of pull-out behaviour of small diameter medium density polyethylene pipes, agreement number : CRDPJ, agreement value : 128000.0, agreement start date : 2018-03-07, agreement end date : nan, description english : nan, description french : nan, expected results english : nan, expected results french : nan, additional information english : Grant or Award spanning more than one fiscal year (2017-2018 to 2019-2020)., additional information french : Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2019-2020)., owner organization : nserc-crsng, owner organization title : Natural Sciences and Engineering Research Council of Canada | Conseil de recherches en sciences naturelles et en génie du Canada