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Physical and MPM modelling of sand column collapse with different moisture and density conditions

文献类型：期刊论文

作者Zhan ZQ1; Zhou C1; Cai GL1; Liu CQ(刘传奇)2; Liu JQ3; Wu Y4
刊名POWDER TECHNOLOGY
出版日期2026-01-15
卷号467页码:13
关键词Sands Partial saturation Deformation Model tests Numerical modelling
ISSN号0032-5910
DOI10.1016/j.powtec.2025.121572
通讯作者Zhou, C.(c.zhou@polyu.edu.hk)
英文摘要The sand column collapse test is a simple but useful experiment for investigating the dynamic behaviour of granular flow, which is an important topic in engineering geology and the validation of numerical models. Previous studies have not adequately considered the influence of soil moisture and density conditions. In this study, a series of sand column collapse tests were conducted, considering five water contents ranging from 0 to 10 % and two relative densities of 40 % and 58 %. Particle Image Velocimetry (PIV) was utilised to post-process the experimental results. A hydro-mechanical coupled Material Point Method (MPM), improved by incorporating a non-linear strain hardening/softening law, was employed to back-analyse the physical model tests. The measured and computed results show that as water content increases, the degree of collapse and post-collapse runout distance initially decrease, consistent with changes in Bishop's stress, affected by suction and interparticle water meniscus. As relative density increases, both the degree of collapse and the post-collapse runout distance decrease due to the greater shear strength and Bishop's stress. The MPM simulations closely matched experimental results, confirming the model's accuracy in simulating large deformations in both dry and unsaturated soils.
分类号二类
WOS关键词MATERIAL POINT METHOD ; CONSTITUTIVE MODEL ; LANDSLIDES
资助项目Hong Kong Research Grants Council[AoE/E-603/18] ; Hong Kong Research Grants Council[15205721] ; National Natural Science Foundation of China[52222809] ; National Natural Science Foundation of China[12172368] ; One Hundred Talents Program of the Chinese Academy of Sciences
WOS研究方向Engineering
语种英语
WOS记录号WOS:001563938100003
资助机构Hong Kong Research Grants Council ; National Natural Science Foundation of China ; One Hundred Talents Program of the Chinese Academy of Sciences
其他责任者Zhou, C.
源URL[http://dspace.imech.ac.cn/handle/311007/103671]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China;
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100090, Peoples R China;
3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn Safety, Wuhan 430071, Peoples R China;
4.Guangzhou Univ, Sch Civil Engn & Transportat, Guangzhou, Peoples R China
推荐引用方式
GB/T 7714		 Zhan ZQ,Zhou C,Cai GL,et al. Physical and MPM modelling of sand column collapse with different moisture and density conditions[J]. POWDER TECHNOLOGY,2026,467:13.
APA Zhan ZQ,Zhou C,Cai GL,刘传奇,Liu JQ,&Wu Y.(2026).Physical and MPM modelling of sand column collapse with different moisture and density conditions.POWDER TECHNOLOGY,467,13.
MLA Zhan ZQ,et al."Physical and MPM modelling of sand column collapse with different moisture and density conditions".POWDER TECHNOLOGY 467(2026):13.

入库方式： OAI收割

来源：力学研究所

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