Modelling hydro-mechanical coupled behaviour of unsaturated soil with two-phase two-point material point method | |
Zhan, ZQ; Zhou, C; Liu CQ(刘传奇); Ng, CWW | |
发表期刊 | COMPUTERS AND GEOTECHNICS |
2023-03-01 | |
卷号 | 155页码:16 |
ISSN | 0266-352X |
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. |
关键词 | Material point method Unsaturated soil Hydro-mechanical coupling Large deformation Landslide |
DOI | 10.1016/j.compgeo.2022.105224 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000918046700001 |
关键词[WOS] | WATER-RETENTION MODEL ; HYDRAULIC CONDUCTIVITY ; DEFORMATION ; FAILURE |
WOS研究方向 | Computer Science ; Engineering ; Geology |
WOS类目 | Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary |
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] |
项目资助者 | Hong Kong Research Grants Council ; Chinese Academy of Sciences ; National Natural Science Foundation of China |
论文分区 | 一类 |
力学所作者排名 | 1 |
RpAuthor | Zhou C ; Liu CQ |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/91523 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Liu CQ(刘传奇) |
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,Liu CQ,&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. |
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