Knowledge Management System of Institute of Rock and Soil Mechanics,CAS
| 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 Publication | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| ISSN | 1435-9529 |
| Volume | 77Issue:1Pages:265-282 |
| Abstract | 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. |
| Keyword | Underground cavern Seismic stability Nearfault ground motion Geological discontinuity Continuously yielding model Damage potential index |
| DOI | 10.1007/s10064-016-0936-9 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Engineering ; Geology |
| WOS Subject | Engineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary |
| WOS ID | WOS:000424335400018 |
| Publisher | SPRINGER HEIDELBERG |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 |
| Affiliation | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.PowerChina Huadong Engn Corp Ltd |
| First Author Affilication | Institute 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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| Effects of a control（2717KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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