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Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions
Cui, Zhen1,2; Sheng, Qian1; Leng, Xianlun1
2018
Source PublicationBULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN1435-9529
Volume77Issue:1Pages:265-282
AbstractThe 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.
KeywordUnderground cavern Seismic stability Nearfault ground motion Geological discontinuity Continuously yielding model Damage potential index
DOI10.1007/s10064-016-0936-9
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000424335400018
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://119.78.100.198/handle/2S6PX9GI/4211
Collection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
Affiliation1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ;
2.PowerChina Huadong Engn Corp Ltd
First Author AffilicationInstitute of Rock and Soil Mechanics, chinese Academy of sciences
Recommended Citation
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.
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