| DOI: | 10.1002/2015GL064917
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| 论文题名: | Ambient resonance of Mesa Arch, Canyonlands National Park, Utah |
| 作者: | Starr A.M.; Moore J.R.; Thorne M.S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9331
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| EISSN: | 1944-9062
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| 出版年: | 2015
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| 卷: | 42, 期:16 | | 起始页码: | 6696
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| 结束页码: | 6702
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| 语种: | 英语
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| 英文关键词: | ambient vibration
; diurnal tilt
; modal analysis
; rock arch
; structural health monitoring
; thermal stress
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| Scopus关键词: | Arches
; Modal analysis
; Seismology
; Structural health monitoring
; Thermal stress
; Thermoelasticity
; Vibration analysis
; Ambient vibrations
; Diurnal tilt
; Environmental conditions
; Irreversible damage
; Resonance characteristic
; Resonant frequency shift
; Thermoelastic stress
; Vibrational mode shapes
; Natural frequencies
; arch
; environmental conditions
; numerical model
; resonance
; seismic data
; structural analysis
; thermoelasticity
; three-dimensional modeling
; tilt
; Canyonlands National Park
; United States
; Utah
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| 英文摘要: | We analyzed the resonance characteristics of a prominent natural arch in Canyonlands National Park, Mesa Arch, as measured from ambient seismic data. Evaluating spectral and polarization attributes, we distinguished the first four resonant frequencies of the arch, 2.9, 6.0, 6.9, and 8.5 Hz, as well as basic properties of the associated mode shapes. We then affirmed experimental data using 3-D numerical modal analysis, providing estimates of material properties and clarifying vibrational mode shapes. Monitoring resonant frequencies over time, we searched for shifts associated with changing environmental conditions and long-term progressive damage. We measured ∼3% direct daily variation in resonant frequency associated with changing rock temperature, thermal stress, and stiffening of the rock matrix. Independent tilt data showed similar diurnal cycles associated with thermoelastic stresses and deformation of the arch. We observed no permanent resonant frequency shifts related to irreversible damage of Mesa Arch during our study period. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941732721&doi=10.1002%2f2015GL064917&partnerID=40&md5=a06fcaa64ff0351c09b933d2ea16fa99
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8946
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, United States
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| Recommended Citation: | |
Starr A.M.,Moore J.R.,Thorne M.S.. Ambient resonance of Mesa Arch, Canyonlands National Park, Utah[J]. Geophysical Research Letters,2015-01-01,42(16).
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