Title Stresses and deformations in a buried oil pipeline subject to differential frost heave in permafrost regions
Author Wu Yaping; Sheng Yu; Wang Yong; Jin Huijun; Chen Wu
Author Affil Wu Yaping, Lanzhou Jiaotong University, School of Civil Engineering, Lanzhou, China. Other: Chinese Academy of Sciences, Cold and Arid Regions Environmental and Engineering Research Institute
Source China-Russia crude oil pipeline in permafrost regions in northeastern China, edited by Jin Huijun, G. Gay and M.C. Brewer. Cold Regions Science and Technology, 64(3), p.256-261, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165-232X
Publication Date Dec. 2010
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309508
Index Terms construction; damage; deformation; design; frost heave; mechanical properties; models; moisture; permafrost; pipelines; soil mechanics; stresses; temperature; thermal analysis; buried features; elastoplastic materials; finite element analysis; frost heaving; numerical analysis; stress
Abstract Differential frost heave of the buried oil pipelines in permafrost regions can have an adverse effect on the mechanical status of the pipeline, and seriously endanger the pipeline security. In order to reduce the damage to the pipeline during its designed lifetime, it is necessary to analyze the mechanical behavior of oil pipelines taking into consideration the differential frost heave in the design of the pipelines in permafrost regions. In this paper, an elastico-plastic finite element model for the mechanical behaviors of the pipeline-soil system was established. In order to simplify computations, the effects of the temperature and moisture fields on the problem were considered by applying the computed temperature zones of soils surrounding the pipeline from the thermal analysis, and actual frost heaving ratio of the soils was applied to the mechanical model to calculate the stresses and deformations of the pipeline in permafrost regions. These analyses may provide some useful insights into the possible mechanical states of the pipeline- soil system for the design, construction and operation of the buried oil pipelines in permafrost regions.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.07.004
Publication Type journal article
Record ID 65006599