Cushion Layer Effect on the Impact of a Dry Granular Flow Against a Curved Rock Shed

doi:10.1007/s00603-018-1478-1

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

	Cushion Layer Effect on the Impact of a Dry Granular Flow Against a Curved Rock Shed
	Jiang, Yuan-Jun1 ; Wang, Zheng-Zheng 2; Song, Yue 3; Xiao, Si-You3
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2018-07-01
卷号	51 期号:7 页码:2191-2205
关键词	Dry granular flow Curved-surface rock shed Impact Cushion layer
ISSN号	0723-2632
DOI	10.1007/s00603-018-1478-1
英文摘要	The dry granular flow produced by a landslide or mountain collapse represents an intense threat to road structures, including rock sheds in mountainous areas. In this study, we designed a set of experiments to investigate the impact mechanism of dry granular flow against a rock shed. The experimental rock shed model was characterized by a curved surface and a cushion layer of granular materials. Based on a video recording and the time history of the impact force, we determined the impact force characteristics and found that for cases without a cushion layer, the maximum normal and tangential force components are close to the end of the rock shed directly facing granular flow impact. With the addition of a cushion layer, the maximum impact force decreases and shifts approximately 30A degrees-45A degrees away from the end, which indicates that a cushion layer can not only reduce the magnitude of the impact force, but also change its distribution mode. We also verified the stronger energy dissipation capability of a cushion layer made of finer granular material. Finally, we performed a stiffness analysis, calculated the internal forces, and found that cushion layers can reduce the internal bending moment and internal shear force and increase the internal axial force. From the engineering perspective, all the changes introduced by a cushion layer positively contribute to rock shed safety.
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000435953800013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/21474]
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	Wang, Zheng-Zheng
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Sect 4,RenMinNanLu Ave, Chengdu 610041, Sichuan, Peoples R China 2.Dalian Univ Technol, Sch Civil Engn, Dalian, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yuan-Jun,Wang, Zheng-Zheng,Song, Yue,et al. Cushion Layer Effect on the Impact of a Dry Granular Flow Against a Curved Rock Shed[J]. ROCK MECHANICS AND ROCK ENGINEERING,2018,51(7):2191-2205.
APA	Jiang, Yuan-Jun,Wang, Zheng-Zheng,Song, Yue,&Xiao, Si-You.(2018).Cushion Layer Effect on the Impact of a Dry Granular Flow Against a Curved Rock Shed.ROCK MECHANICS AND ROCK ENGINEERING,51(7),2191-2205.
MLA	Jiang, Yuan-Jun,et al."Cushion Layer Effect on the Impact of a Dry Granular Flow Against a Curved Rock Shed".ROCK MECHANICS AND ROCK ENGINEERING 51.7(2018):2191-2205.