IMECH-IR  > 流固耦合系统力学重点实验室
PORO-ELASTOPLASTIC MODELLING OF UPLIFT RESISTANCE OF SHALLOWLY-BURIED PIPELINES
Qi WG(漆文刚); Shi YM; Gao FP(高福平); Qi, WG (reprint author), Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing, Peoples R China.
Source PublicationPROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 5B
2017
Conference Name36th ASME International Conference on Ocean, Offshore and Arctic Engineering
Conference DateJUN 25-30, 2017
Conference PlaceTrondheim, NORWAY
Abstract

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 wave induced 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.

KeywordSand Wave Pipes
WOS IDWOS:000417225000003
Funding OrganizationThis work was supported by the National Natural Science Foundation of China (Grant Nos. 11232012, 11372319, 11602273) and the Strategic Priority Research Program (Type-B) of CAS (Grant No. XDB22030000).
ISBN978-0-7918-5770-0
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/72170
Collection流固耦合系统力学重点实验室
Corresponding AuthorQi, WG (reprint author), Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing, Peoples R China.
Affiliation1.[Qi, Wen-gang
2.Shi, Yu-min
3.Gao, Fu-ping] Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing, Peoples R China
4.[Qi, Wen-gang
5.Shi, Yu-min
6.Gao, Fu-ping] Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Qi WG,Shi YM,Gao FP,et al. PORO-ELASTOPLASTIC MODELLING OF UPLIFT RESISTANCE OF SHALLOWLY-BURIED PIPELINES[C]. NEW YORK:AMER SOC MECHANICAL ENGINEERS,2017.
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