Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL087239 |
Sparse Ambient Resonance Measurements Reveal Dynamic Properties of Freestanding Rock Arches | |
Geimer, Paul R.; Finnegan, Riley; Moore, Jeffrey R. | |
2020-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The dynamic properties of freestanding rock landforms are a function of fundamental material and mechanical parameters, facilitating noninvasive vibration-based structural assessment. Characterization of resonant frequencies, mode shapes, and damping ratios, however, can be challenging at culturally sensitive geologic features, such as rock arches, where physical access is limited. Using sparse ambient vibration measurements, we describe three resonant modes between 1 and 40 Hz for 17 natural arches in Utah spanning a range of lengths from 3-88 m. Modal polarization data are evaluated to combine field observations with 3-D numerical models. We find outcrop-scale elastic moduli vary from 0.8 to 8.0 GPa, correlated with diagenetic processes and identify low damping at all sites. Correlation of dense-array measurements from one arch validates predictions of simple bending modes and fixed boundary conditions. Our results establish use of sparse ambient resonance measurements for structural assessment and monitoring of arches and similar freestanding geologic features worldwide. |
英文关键词 | modal analysis natural arch structural health monitoring ambient vibration environmental seismology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536639500059 |
WOS关键词 | NATURAL FREQUENCIES ; NAVAJO SANDSTONE ; UTAH |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279902 |
专题 | 气候变化 |
作者单位 | Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA |
推荐引用方式 GB/T 7714 | Geimer, Paul R.,Finnegan, Riley,Moore, Jeffrey R.. Sparse Ambient Resonance Measurements Reveal Dynamic Properties of Freestanding Rock Arches[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(9). |
APA | Geimer, Paul R.,Finnegan, Riley,&Moore, Jeffrey R..(2020).Sparse Ambient Resonance Measurements Reveal Dynamic Properties of Freestanding Rock Arches.GEOPHYSICAL RESEARCH LETTERS,47(9). |
MLA | Geimer, Paul R.,et al."Sparse Ambient Resonance Measurements Reveal Dynamic Properties of Freestanding Rock Arches".GEOPHYSICAL RESEARCH LETTERS 47.9(2020). |
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