A debris-flow impact pressure model combining material characteristics and flow dynamic parameters

doi:10.1007/s11629-018-5114-z

IMHE OpenIR

	A debris-flow impact pressure model combining material characteristics and flow dynamic parameters
	Tang, Jin-bo; Hu, Kai-heng1
Corresponding Author	Hu, Kai-heng(khhu@imde.ac.cn)
	2018-12-01
Source Publication	JOURNAL OF MOUNTAIN SCIENCE
ISSN	1672-6316
Volume	15 Issue:12 Pages:2721-2729
Subtype	Article
Contribution Rank	1
Abstract	Impact force is a crucial factor to be considered in debris-resisting structure design. The impact of debris flow against a structural barrier depends not only on the flow dynamics but also on the barrier material. Based on the structural vibration equation and energy conservation law, a simple model for calculating debris-flow impact pressure is proposed, which includes the mechanical impedance of the material, debris-flow velocity and Froude number. Twenty-five impact tests have been conducted using different kinds of materials: steel, black granite, white granite, marble and polyvinyl chloride (PVC) board, and the ratio of the maximum impact time to the vibration period of the structure is determined for the model. It is found that the ratio's square root shows a linear relationship with the material solid Froude number. This indicates that the impedance of the structures plays an important role in the flow-barrier interaction. Moreover, the debrisflow impact force is found to decrease with the travel time of the elastic stress wave though the structures.
Keyword	Debris flows Impact pressure Dynamical responses Mechanical impedance
DOI	10.1007/s11629-018-5114-z
Indexed By	SCI
WOS Keyword	JIANGJIA RAVINE ; PARTICLE-SIZE ; FORCE
Language	英语
Funding Project	National Natural Science Foundation of China[41771045]
WOS Research Area	Environmental Sciences & Ecology
WOS Subject	Environmental Sciences
WOS ID	WOS:000453393800013
Funding Organization	National Natural Science Foundation of China
Publisher	SCIENCE PRESS
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imde.ac.cn/handle/131551/24740
Collection	中国科学院水利部成都山地灾害与环境研究所
Corresponding Author	Hu, Kai-heng
Affiliation	1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Sichuan, Peoples R China; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
Corresponding Author Affilication	中国科学院水利部成都山地灾害与环境研究所
Recommended Citation GB/T 7714	Tang, Jin-bo,Hu, Kai-heng. A debris-flow impact pressure model combining material characteristics and flow dynamic parameters[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(12):2721-2729.
APA	Tang, Jin-bo,&Hu, Kai-heng.(2018).A debris-flow impact pressure model combining material characteristics and flow dynamic parameters.JOURNAL OF MOUNTAIN SCIENCE,15(12),2721-2729.
MLA	Tang, Jin-bo,et al."A debris-flow impact pressure model combining material characteristics and flow dynamic parameters".JOURNAL OF MOUNTAIN SCIENCE 15.12(2018):2721-2729.

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