Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions

doi:10.1007/s10064-016-0936-9

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

	Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions
	Cui, Zhen 1,2; Sheng, Qian 1; Leng, Xianlun 1
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2018
卷号	77 期号:1 页码:265-282
关键词	Underground cavern Seismic stability Nearfault ground motion Geological discontinuity Continuously yielding model Damage potential index
ISSN号	1435-9529
DOI	10.1007/s10064-016-0936-9
英文摘要	The mechanism for the influence of near-fault ground motion on seismic issues for underground rock caverns has seldom been addressed, especially for caverns controlled by large geological discontinuities. In this paper, a nonlinear joint model was used to simulate the effects of unfavorable geological discontinuities under seismic excitation. The influence of near-fault ground motion on unfavorable geological discontinuities was analyzed using a large sample of ground-motion records collected from the NGA-West2 database. A damage potential index (DPI) for unfavorable geological discontinuities was proposed and discussed. The #1 surge chamber of the Baihetan Hydropower Plant, which is dominated by interlayer shear weakness zone (ISWZ) C2, was used as a study case to investigate the differences between pulse-type near-fault ground motion, non-pulse-type near-fault ground motion, and far-field ground motion. The results of the study indicate that (1) significant velocity and displacement as well as a stronger long-period response spectrum are key characteristics of pulse-type near-fault ground motions, whereas non-pulse-type near-fault ground motions display characteristics similar to those of far-field ground motions; (2) the velocity pulse is responsible for the destructive capabilities of near-fault ground motions; (3) the peak ground velocity (PGV) was shown to be the most suitable DPI of several ground-motion parameters for large geological discontinuities under seismic excitation (applicable to both near-fault and far-field ground motions); and (4) PGV was verified to be the most effective DPI for ISWZ C2 at the Baihetan #1 surge chamber. The cavern became fragile when subjected to near-fault ground motions, so special seismic reinforcement measures are recommended. These findings may provide a reference for the seismic design of underground caverns.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000424335400018
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4211]
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	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.PowerChina Huadong Engn Corp Ltd
推荐引用方式 GB/T 7714	Cui, Zhen,Sheng, Qian,Leng, Xianlun. Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2018,77(1):265-282.
APA	Cui, Zhen,Sheng, Qian,&Leng, Xianlun.(2018).Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,77(1),265-282.
MLA	Cui, Zhen,et al."Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 77.1(2018):265-282.