Uplift soil resistance to a shallowly-buried pipeline in the sandy seabed under waves: Poro-elastoplastic modeling

doi:10.1016/j.apor.2019.102024

IMECH-IR > 流固耦合系统力学重点实验室

	Uplift soil resistance to a shallowly-buried pipeline in the sandy seabed under waves: Poro-elastoplastic modeling
	Qi WG(漆文刚)1,2 ; Shi YM(师玉敏)1,2 ; Gao FP(高福平)1,2
通讯作者	Gao, Fu-Ping(fpgao@imech.ac.cn)
发表期刊	APPLIED OCEAN RESEARCH
	2020-02-01
卷号	95 页码:13
ISSN	0141-1187
摘要	A reasonable evaluation of the vertical soil resistance to a buried pipeline is crucial for upheaval buckling analyses. Under wave troughs, the effective stress in the seabed could be reduced significantly due to the upward seepage caused by vertical pore-pressure gradients. To investigate the influence of wave loading on the vertical soil resistance to a buried pipe, a plane-strain poro-elastoplastic model is proposed and verified with the existing pipe-soil interaction test results and DNV GL predictions. The model is capable of sequentially simulating the pore-pressure generation in a sandy seabed under waves and the plastic-zone development while uplifting the pipe. Numerical results show that the presence of wave troughs could not only reduce the soil effective stress, but also generate an additional uplift force on the buried pipe due to non-uniform distribution of pore-pressures along the pipe periphery. The normalized additional uplift force generally increases linearly with normalized amplitude of wave pressures at seabed mudline. Parametric study is then performed to examine the influence of wave parameters and soil properties. Moreover, to qualitatively characterize the effect of wave loading, a resistance-reduction coefficient is introduced and found to decrease linearly with the increase of normalized amplitude of wave pressure at seabed mudline.
关键词	Wave-seabed-pipeline interaction Poro-elastoplastic model Buried pipe Transient pore-pressure response Vertical soil resistance
DOI	10.1016/j.apor.2019.102024
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000513290200013
关键词[WOS]	SUBMARINE PIPELINE ; NONLINEAR-WAVE ; LIQUEFIED SOIL ; LIQUEFACTION ; MECHANISMS ; PRESSURES ; PIPES ; FLOW
WOS研究方向	Engineering ; Oceanography
WOS类目	Engineering, Ocean ; Oceanography
资助项目	National Natural Science Foundation of China[11825205] ; National Natural Science Foundation of China[11602273] ; Strategic Priority Research Program (Type-B) of Chinese Academy of Sciences[XDB22030000]
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program (Type-B) of Chinese Academy of Sciences
论文分区	二类
力学所作者排名	1
RpAuthor	Gao, Fu-Ping
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81512
专题	流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Qi WG,Shi YM,Gao FP. Uplift soil resistance to a shallowly-buried pipeline in the sandy seabed under waves: Poro-elastoplastic modeling[J]. APPLIED OCEAN RESEARCH,2020,95:13.
APA	漆文刚,师玉敏,&高福平.(2020).Uplift soil resistance to a shallowly-buried pipeline in the sandy seabed under waves: Poro-elastoplastic modeling.APPLIED OCEAN RESEARCH,95,13.
MLA	漆文刚,et al."Uplift soil resistance to a shallowly-buried pipeline in the sandy seabed under waves: Poro-elastoplastic modeling".APPLIED OCEAN RESEARCH 95(2020):13.

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