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Modelling hydro-mechanical coupled behaviour of unsaturated soil with two-phase two-point material point method

文献类型：期刊论文

作者Zhan, ZQ; Zhou, C; Liu CQ(刘传奇); Ng, CWW
刊名COMPUTERS AND GEOTECHNICS
出版日期2023-03-01
卷号155页码:16
关键词Material point method Unsaturated soil Hydro-mechanical coupling Large deformation Landslide
ISSN号0266-352X
DOI10.1016/j.compgeo.2022.105224
通讯作者Zhou, C.(c.zhou@polyu.edu.hk) ; Liu, C. Q.(chuanqil@imech.ac.cn)
英文摘要Material point method (MPM) offers an effective approach for analysing large-deformation problems, such as landslides that often involve unsaturated soil. Several MPM formulations for unsaturated soil have been reported in the literature, but they assumed that water retention ability and permeability function are independent of soil deformation. Furthermore, most studies used a single set of material points, so they cannot simulate some processes (e.g., the infiltration of free water into unsaturated soil). To address these problems, a two-point MPM formulation has been extended from saturated to unsaturated soils, considering the influence of porosity change on the water retention curve and permeability function. The information of solid and liquid phases is carried by two individual sets of material points, assuming zero air pressure. The elastoplastic mechanical behaviour is modelled by the Drucker-Prager model using Bishop's stress. The MPM simulations were compared with the results of physical model tests (for large-deformation problems) and finite element analysis (for smalldeformation problems). It is evident that the proposed MPM formulation is able to capture various hydromechanical problems well. In particular, the computed failure processes of unsaturated soil slope under rainfall are consistent with results from physical model tests.
分类号二类/Q1
WOS关键词WATER-RETENTION MODEL ; HYDRAULIC CONDUCTIVITY ; DEFORMATION ; FAILURE
资助项目Hong Kong Research Grants Council[AoE/E-603/18] ; Hong Kong Research Grants Council[15205721] ; Chinese Academy of Sciences ; National Natural Science Foundation of China[12172368]
WOS研究方向Computer Science ; Engineering ; Geology
语种英语
WOS记录号WOS:000918046700001
资助机构Hong Kong Research Grants Council ; Chinese Academy of Sciences ; National Natural Science Foundation of China
其他责任者Zhou, C. ; Liu, C. Q.
源URL[http://dspace.imech.ac.cn/handle/311007/91522]  
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. Modelling hydro-mechanical coupled behaviour of unsaturated soil with two-phase two-point material point method[J]. COMPUTERS AND GEOTECHNICS,2023,155:16.
APA Zhan, ZQ,Zhou, C,刘传奇,&Ng, CWW.(2023).Modelling hydro-mechanical coupled behaviour of unsaturated soil with two-phase two-point material point method.COMPUTERS AND GEOTECHNICS,155,16.
MLA Zhan, ZQ,et al."Modelling hydro-mechanical coupled behaviour of unsaturated soil with two-phase two-point material point method".COMPUTERS AND GEOTECHNICS 155(2023):16.

入库方式： OAI收割

来源：力学研究所

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