Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns

doi:10.1016/j.tust.2013.10.012

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns
	Zhang, Yonghui; Sheng, Qian; Fu, Xiaodong
刊名	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
	2014
卷号	40 页码:241-250
关键词	Discontinuous deformation analysis Viscous boundary Bottom stress input Seismic dynamic response Underground caverns
ISSN号	0886-7798
DOI	10.1016/j.tust.2013.10.012
英文摘要	Two modifications are made to enable the DDA method to be used to study the seismic dynamic response of underground caverns. The first modification involves setting viscous boundary conditions and the second involves inputting seismic waves from the bottom in stress way. The modified DDA code is verified by a two-dimensional continuous model. Moreover, for the propagation problem of an elastic P-wave travelling across a joint face, the numerical solution of the modified DDA is close to the theoretical solution. The modified DDA method is applied to study the seismic response of the underground houses of the Dagangshan hydropower station in Western China, and valuable results are obtained. At three intensity levels, whether the KOBE seismic wave or the artificial seismic wave, will bring about the damage of the surrounding rock masses of unsupported underground houses. Increasing the seismic intensity increases the destructive effect of the wave. The most unstable blocks are at the downstream side wall of the main machine building and tail surge chamber, and these blocks slide first during an earthquake. By contrast, with bolt supporting, the surrounding rock masses maintain stability. Bolt forces change dramatically during the first few seconds of the earthquake (about 6 s in the KOBE seismic wave and 10 s in the artificial seismic wave), and then remain stable. The bolts through the most unstable blocks experience the largest forces, which means the most unstable blocks are the most dangerous blocks during an earthquake. (C) 2013 Elsevier Ltd. All rights reserved.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000330150700024
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3557]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Zhang, Yonghui,Sheng, Qian,Fu, Xiaodong. Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2014,40:241-250.
APA	Zhang, Yonghui,Sheng, Qian,&Fu, Xiaodong.(2014).Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,40,241-250.
MLA	Zhang, Yonghui,et al."Modification of the discontinuous deformation analysis method and its application to seismic response analysis of large underground caverns".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 40(2014):241-250.