MPM evaluation of the dynamic runout process of the giant Daguangbao landslide

doi:10.1007/s11629-019-5831-y

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

	MPM evaluation of the dynamic runout process of the giant Daguangbao landslide
	Li, Xinpo 1,2; Tang, Xiong 1,2; Zhao, Shuxi 1,2; Yan, Qiwei 1,2; Wu, Yong 1,2
刊名	LANDSLIDES
	2020
页码	DOI: 10.1007/s10346-020-01569-2
关键词	Landslide Runout analysis Material point method Friction degradation
ISSN号	1612-510X
DOI	10.1007/s11629-019-5831-y
产权排序	1
文献子类	Article;Early Access
英文摘要	Giant landslides can cause significant damage to their dynamic runout processes. Understanding the mechanics of the runout process is essential for landslide risk assessment and mitigation design. This paper investigates the runout process of the 1.16 x 10(9) m(3) giant Daguangbao landslide triggered by the 2008 Ms 8.0 Wenchuan earthquake. The Daguangbao landslide is a typical bedding-plane slide and the properties of basal sliding surface play a key role in the runout behaviors of the landslide. The material point method (MPM) is adopted as a numerical tool of the simulations. A thermal-based velocity-weakening friction law is used to simulate the contact between the sliding body and the basal sliding surface. A strain-softening constitutive model is used to evaluate the damages inside the landslide body and their effects on the runout behaviors of the landslide. Numerical results reveal that landslide mass slides along the bedding-plane as a whole body initially and then disintegrates during the runout process. The calculated duration of sliding is 64 s and the maximum velocity reaches 60 m/s. The friction coefficient of the slip surface decreases sharply as the landslide body starts to move, and a steady-state friction coefficient mu approximate to 0.06 is reached when the velocity exceeds approximately 20 m/s. Friction degradation of the slip surface shows a sensible influence on the final runout distance and the depth of the deposit zone. The dynamic fragmentation of the landslide body, the final runout distance, and deposition topography are also significantly affected by material softening.
电子版国际标准刊号	1993-0321
资助项目	NSFC[41877291] ; NSFC[41672356] ; National Key R&D Program of China[2020YFC1512005] ; Belt & Road international cooperation team for the Light of West program of CAS ; Key Research Program of the Chinese Academy of Sciences[KFZD-SW-424]
WOS关键词	MATERIAL-POINT METHOD ; IN-CELL METHOD ; EARTHQUAKE ; FLOW ; SIMULATION ; VELOCITY ; FORCE ; DEFORMATION ; LUBRICATION ; IMPACT
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000538038700012
资助机构	NSFC ; National Key R&D Program of China ; Belt & Road international cooperation team for the Light of West program of CAS ; Key Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/50740]
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	Li, Xinpo; Wu, Yong
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Xinpo,Tang, Xiong,Zhao, Shuxi,et al. MPM evaluation of the dynamic runout process of the giant Daguangbao landslide[J]. LANDSLIDES,2020:DOI: 10.1007/s10346-020-01569-2.
APA	Li, Xinpo,Tang, Xiong,Zhao, Shuxi,Yan, Qiwei,&Wu, Yong.(2020).MPM evaluation of the dynamic runout process of the giant Daguangbao landslide.LANDSLIDES,DOI: 10.1007/s10346-020-01569-2.
MLA	Li, Xinpo,et al."MPM evaluation of the dynamic runout process of the giant Daguangbao landslide".LANDSLIDES (2020):DOI: 10.1007/s10346-020-01569-2.