MPM formulations for the coupled thermo-hydro-mechanical behaviour of saturated and unsaturated soils

doi:10.1016/j.compgeo.2024.106313

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	MPM formulations for the coupled thermo-hydro-mechanical behaviour of saturated and unsaturated soils
	Zhan, ZQ; Zhou, C; Liu CQ(刘传奇); Du, J T
刊名	COMPUTERS AND GEOTECHNICS
	2024-06-01
卷号	170 页码:24
关键词	Landslides Partial saturation Numerical modelling Slopes Temperature effects
ISSN号	0266-352X
DOI	10.1016/j.compgeo.2024.106313
通讯作者	Zhou, C.(c.zhou@polyu.edu.hk) ; Liu, C. Q.(chuanqil@imech.ac.cn)
英文摘要	Frictional heating -induced excess pore water pressure is a significant factor contributing to the rapid movement of landslides. Although some studies have explored the thermal effects on fully saturated soil slopes, this study focuses on unsaturated soils and employs a thermo-hydro-mechanical (THM) coupled material point method (MPM) to simulate large deformation problems involving frictional heating. The THM coupling effects are accounted for by adopting a void ratio and temperature -dependent soil water retention curve (SWRC) and permeability function, and by considering the influence of void ratio and degree of saturation on thermal conductivity. The mechanical behaviour incorporates unsaturation effects, as well as thermal strain and strain hardening/softening. The MPM simulations are validated against experimental and analytical results, and parametric studies are conducted to investigate the influence of frictional heating on landslide mobility across different soil types and initial moisture conditions. The results indicate that the effects of frictional heating on the mobility of landslides involving soil with higher water retention capacity are less pronounced. For a given soil, when the initial water content is relatively low, the increase in landslide displacement caused by frictional heating becomes less significant as the water content increases. However, the opposite trend occurs when the soil is close to saturation.
分类号	一类
资助项目	Hong Kong Research Grants Council[AoE/E-603/18] ; Hong Kong Research Grants Council[15205721] ; One Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China[12172368]
WOS关键词	MATERIAL POINT METHOD ; HYDRAULIC CONDUCTIVITY ; CATASTROPHIC COLLAPSE ; DYNAMIC BEHAVIOR ; FLUID-FLOW ; MODEL ; HEAT ; TEMPERATURE ; DEFORMATION ; EQUATIONS
WOS研究方向	Computer Science ; Engineering ; Geology
语种	英语
WOS记录号	WOS:001241224200001
资助机构	Hong Kong Research Grants Council ; One Hundred Talents Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
其他责任者	Zhou, C. ; Liu, CQ
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/95584]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhan, ZQ,Zhou, C,Liu CQ,et al. MPM formulations for the coupled thermo-hydro-mechanical behaviour of saturated and unsaturated soils[J]. COMPUTERS AND GEOTECHNICS,2024,170:24.
APA	Zhan, ZQ,Zhou, C,刘传奇,&Du, J T.(2024).MPM formulations for the coupled thermo-hydro-mechanical behaviour of saturated and unsaturated soils.COMPUTERS AND GEOTECHNICS,170,24.
MLA	Zhan, ZQ,et al."MPM formulations for the coupled thermo-hydro-mechanical behaviour of saturated and unsaturated soils".COMPUTERS AND GEOTECHNICS 170(2024):24.