Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow

doi:10.1061/(ASCE)GM.1943-5622.0002421

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Dynamic Response of Granular Flows on a Rigid Barrier: Dense versus Dilute Flow
	Dong, Zhi-Bo 3,4; Su, Li-Jun 2,3,4; Xiao, Si-You 1; Zhang, Chong-Lei 2,4
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	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
DOI	10.1061/(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.
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关键词	IMPACT FORCE ; PARTICLE-SIZE ; DEBRIS FLOWS ; LANDSLIDE ; PRESSURE ; DESIGN
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000795994300033
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
内容类型	期刊论文
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.