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TitleSeismic behavior of buried energy pipelines in northern permafrost regions
AuthorDadfar, D.B; El Naggar, H.E.N.; Nastev, M.N.
Source 2015, 8 pages
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20150030
PublisherUniversity of Canterbury (Christchurch, New Zealand)
Meeting6th International Conference on Earthquake Geotechnical Engineering; Christchurch; NZ; November 1-4, 2015
Documentbook
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Subjectsengineering geology; geophysics; soils science; pipelines; permafrost; seismic risk; earthquake risk; landslides; soil creep; soil properties; freezing ground; earthquake resistant design; earthquake studies; seismic velocities; seismic waves; seismic zones; seismicity; seismic interpretations
Illustrationsstructural cross-sections; stratigraphic cross-sections; tables; seismic velocity profiles; seismic profiles; structural diagram; equations
ProgramQuantitave risk assessment project, Public Safety Geoscience
AbstractApproximately one-third of Canada's marketable conventional resources of natural gas and recoverable light crude oil are found in the North. Pipelines, either above-ground or buried, are essential means of transporting this energy supply to refineries and various users. Beside common geohazards, such as river erosion and landslide, earthquake triggered geohazards including transient ground shaking and permanent ground displacement due to liquefaction can also jeopardize the integrity and safety of these pipelines. The main objective of the present study is to investigate the seismic behavior of buried pipelines in regions characterized with discontinuous permafrost conditions. To achieve this goal, the impacts of local soil conditions and the dynamic interaction of large portions of randomly distributed blocks of frozen soil surrounded by unfrozen soil on the ground motion have been considered. In addition, a simplified analysis has been developed to evaluate the seismic response of buried pipelines considering soil-pipe interaction, geometric nonlinearities and large deformations.
Summary(Plain Language Summary, not published)
Pipelines, either above-ground or buried, are essential means of oïl and gas transport. They are occasionally exposed to earthquake triggered geohazards. A computer program was developed for dynamic analysis of buried pipelines in discontinuous permafrost considering soil-pipe interaction, geometric nonlinearities and large deformations.
GEOSCAN ID296369