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Poro-elastoplastic modelling of uplift resistance of shallowlyburied pipelines
Qi WG(漆文刚)1,2; Shi YM(师玉敏)1,2; Gao FP(高福平)1,2
会议录名称ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017
2017
会议名称ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2017
会议日期June 25, 2017 - June 30, 2017
会议地点Trondheim, Norway
摘要During operational cycles of heating and cooling of submarine pipelines, variations of temperature and internal pressure may induce excessive axial compressive force along the pipeline and lead to global buckling of the pipeline. Reliable design against upheaval buckling of a buried pipeline requires the uplift response to be reasonably predicted. Under wave loading, the effective stress of soil could be reduced significantly in the seabed under wave troughs. To investigate the effects of wave-induced pore-pressure on the soil resistance to an uplifted buried pipeline, a poro-elastoplastic model is proposed, which is capable of simulating the wave-induced pore-pressure response in a porous seabed and the development of plastic zones while uplifting a shallowly-buried pipeline. The uplift force on the buried pipeline under wave troughs can be generated by the pore-pressure nonuniformly distributed along the pipe periphery. Numerical results show that the value of uplift force generally increases linearly with the waveinduced mudline pressure under troughs. Parametric study indicates that the peak soil resistance (under wave troughs) decreases with increasing wave height and wave period, respectively. The ratio of peak soil resistance under wave action to that without waves is mainly dependent on the normalized wave-induced mudline pressure, but influenced slightly by the internal friction angle of soil. Copyright © 2017 ASME.
关键词Arctic engineering Elastoplasticity Marine risers Pore pressure Soils Stress analysis Axial compressive forces Elasto plastic models Heating and cooling Internal friction angle Numerical results Operational cycle Upheaval buckling Uplift resistance
ISBN号9780791857700
收录类别EI
语种英语
引用统计
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/78008
专题流固耦合系统力学重点实验室
作者单位1.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China;
2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式
GB/T 7714
Qi WG,Shi YM,Gao FP. Poro-elastoplastic modelling of uplift resistance of shallowlyburied pipelines[C],2017.
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