An improved calculation model for predicting the coefficient of restitution and maximum impact force of rockfalls

doi:10.1007/s12517-020-06020-3

	An improved calculation model for predicting the coefficient of restitution and maximum impact force of rockfalls
	Mei, Xuefeng 1; Hu, Xiewen 1,2; Zhou, Zhenhua 3; Luo, Gang 1; Wu, Jianli 1
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2020-10-10
卷号	13 期号:20 页码:10
关键词	Rockfall Oblique impact Energy principle Impact force Coefficient of restitution (COR)
ISSN号	1866-7511
DOI	10.1007/s12517-020-06020-3
英文摘要	Rockfalls, which are a common natural hazard, collide and continuously bounce along slope surfaces during their movement; the coefficient of restitution (COR) and impact force are two important characteristic parameters related to the impact process of a rockfall. In this paper, considering the elastoplastic characteristics of the ground material, a theoretical model is proposed to obtain the normal COR and normal impact force at different stages of the impact process. Subsequently, the tangential COR and tangential force are calculated based on the improved friction theory. Finally, an engineering case is studied to illustrate the applicability of the proposed model. The calculation results show that the COR is positively correlated with the incident angle under the same incident velocity and negatively correlated with the incident velocity under the same incident angle; the impact force is linearly and positively correlated with the incident velocity. Under a given slope condition, the theory proposed in this paper can explain the locking phenomenon between the boulder and the slope during impact.
资助项目	National Natural Science Foundation of China[41672283] ; National Natural Science Foundation of China[41731285] ; Major Scientific and Technological Support Research Subject for the Prevention and Control of Ecological Geological Disasters ; Jiuzhaigou Earthquake Stricken Area of Department of Natural Resources of Sichuan Province[KJ-2018-20]
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000581519500003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24959]
专题	中科院武汉岩土力学所
通讯作者	Mei, Xuefeng
作者单位	1.Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu, Sichuan, Peoples R China 2.Southwest Jiaotong Univ, Engn Lab Combined Natl & Local Spatial Informat T, Chengdu, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Mei, Xuefeng,Hu, Xiewen,Zhou, Zhenhua,et al. An improved calculation model for predicting the coefficient of restitution and maximum impact force of rockfalls[J]. ARABIAN JOURNAL OF GEOSCIENCES,2020,13(20):10.
APA	Mei, Xuefeng,Hu, Xiewen,Zhou, Zhenhua,Luo, Gang,&Wu, Jianli.(2020).An improved calculation model for predicting the coefficient of restitution and maximum impact force of rockfalls.ARABIAN JOURNAL OF GEOSCIENCES,13(20),10.
MLA	Mei, Xuefeng,et al."An improved calculation model for predicting the coefficient of restitution and maximum impact force of rockfalls".ARABIAN JOURNAL OF GEOSCIENCES 13.20(2020):10.