Effects of a controlling geological discontinuity on the seismic stability of an underground cavern subjected to near-fault ground motions
文献类型：期刊论文
| 作者 | Cui, Zhen1,2; Sheng, Qian1; Leng, Xianlun1 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000424335400018 |
| 出版者 | SPRINGER HEIDELBERG |
| 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. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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