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  4. 山地灾害与地表过程重点实验室
Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow

文献类型：期刊论文

作者Dong, Zhi-Bo3,4; Su, Li-Jun2,3,4; Xiao, Si-You1; Zhang, Chong-Lei2,4
刊名INTERNATIONAL JOURNAL OF GEOMECHANICS
出版日期2022-07-01
卷号22期号:7页码:8
关键词Granular flow regime Rigid barriers Dynamic response Discrete element method
ISSN号1532-3641
DOI10.1061/(ASCE)GM.1943-5622.0002421
通讯作者Su, Li-Jun(sulijun1976@163.com)
英文摘要Devastating natural hazards induced by the propagation of extremely rapid, flow-like fragmented rocks can be reduced or even avoided by protective structures in the corresponding danger areas. Such barriers are expected to store the mass before it threatens the vulnerable infrastructures. Proper designs are required by calculating the peak impact force of granular flows on the barriers. In this work, a discrete element method (DEM) was validated with a physical experiment. Sixty simulations were carried out using DEM to study the flow regime governing the dynamic response of granular flows against the barrier. Results reveal that the inertial number (I) can demarcate the flow regime into dense and dilute flow. For the dense flows (I < 3), the equation based on the hydrodynamic model is much more efficient. For the dilute flows (I > 3), the Hertz contact method is better at calculating the peak load. The aforementioned findings are expected to be convenient for engineers designing mitigation constructions against flow-like hazards in mountain areas.
WOS关键词IMPACT FORCE ; PARTICLE-SIZE ; DEBRIS FLOWS ; LANDSLIDE ; PRESSURE ; DESIGN
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20030301] ; National Natural Science Foundation[41790432] ; Belt & Road international cooperation team for the Light of West program of CAS ; Youth Innovation Promotion Association of CAS[2019364]
WOS研究方向Engineering
语种英语
WOS记录号WOS:000795994300033
出版者ASCE-AMER SOC CIVIL ENGINEERS
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation ; Belt & Road international cooperation team for the Light of West program of CAS ; Youth Innovation Promotion Association of CAS
源URL[http://ir.imde.ac.cn/handle/131551/56662]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者Su, Li-Jun
作者单位1.Liupanshui Normal Univ, Sch Mines & Civil Engn, Liupanshui 553000, Peoples R China
2.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Zhi-Bo,Su, Li-Jun,Xiao, Si-You,et al. Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2022,22(7):8.
APA Dong, Zhi-Bo,Su, Li-Jun,Xiao, Si-You,&Zhang, Chong-Lei.(2022).Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow.INTERNATIONAL JOURNAL OF GEOMECHANICS,22(7),8.
MLA Dong, Zhi-Bo,et al."Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow".INTERNATIONAL JOURNAL OF GEOMECHANICS 22.7(2022):8.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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