Extensions of the dynamic Newmark method for seismic stability analysis of a rock block

doi:10.1002/nag.3210

	Extensions of the dynamic Newmark method for seismic stability analysis of a rock block
	Fu, Xiaodong 2,3; Du, Wenjie 2,3; Sheng, Qian 2,3; Chen, Jian 2,3,4; Fang, Qiang 1; Zhou, Yongqiang 2,3
刊名	INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
	2021-03-25
页码	23
关键词	block theory contact surface Newmark method rock block seismic action
ISSN号	0363-9061
DOI	10.1002/nag.3210
英文摘要	The Newmark sliding block method combined with block theory (referred to as the dynamic Newmark method) can be used to calculate the dynamic safety factor and the permanent displacement, which provides a quantitative tool to evaluate the dynamic stability of a rock block under seismic action. Frequent changes in the position of a rock block under seismic action may lead to the changes in contact areas and modes of contact between sliding faces. These problems that are not considered in the original dynamic Newmark method are solved to extend the dynamic Newmark method. First, the loop analysis method is introduced to obtain the contact polygonal faces of a sliding surface, and the simplex integration method is used to calculate the contact areas. Second, the reference point method is defined to identify the mode of contact between a structural plane and the surrounding rock mass, and the possible mode of motion of the rock block is determined. Based on these extensions of the dynamic Newmark method, an Extended Newmark Method (ENM) program is developed, and a verification example, three comparison cases, and an application are used to validate the correctness and effectiveness of the extended method. The results show that the ENM program can be used to calculate the effects of the change in contact areas and modes of contact on block motion, which better reflects the dynamic response of a rock block under seismic action compared with the original dynamic Newmark method.
资助项目	Youth Innovation Promotion Association CAS[2021325] ; National Natural Science Foundation of China[51779250] ; International Partnership Program of Chinese Academy of Sciences[131551KYSB20180042] ; National Key R&D Program of China[2018YFC0809400] ; China-Pakistan Joint Research Center on Earth Sciences
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
出版者	WILEY
WOS记录号	WOS:000632675200001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25948]
专题	中科院武汉岩土力学所
通讯作者	Fu, Xiaodong
作者单位	1.Highway Planning Survey Design & Res Inst, Sichuan Prov Commun Dept, Chengdu, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 4.China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan
推荐引用方式 GB/T 7714	Fu, Xiaodong,Du, Wenjie,Sheng, Qian,et al. Extensions of the dynamic Newmark method for seismic stability analysis of a rock block[J]. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,2021:23.
APA	Fu, Xiaodong,Du, Wenjie,Sheng, Qian,Chen, Jian,Fang, Qiang,&Zhou, Yongqiang.(2021).Extensions of the dynamic Newmark method for seismic stability analysis of a rock block.INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,23.
MLA	Fu, Xiaodong,et al."Extensions of the dynamic Newmark method for seismic stability analysis of a rock block".INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS (2021):23.