气候变化领域集成服务门户(CCPortal): A Comprehensive Seismic Monitoring of the Pillar Threatening the World Cultural Heritage Site Chauvet-Pont d'Arc Cave, Toward Rock Damage Assessment

CCPortal

DOI	10.1029/2023EA003329
	A Comprehensive Seismic Monitoring of the Pillar Threatening the World Cultural Heritage Site Chauvet-Pont d'Arc Cave, Toward Rock Damage Assessment
	Guillemot, A.; Audin, L.; Larose, E.; Baillet, L.; Gueguen, P.; Jaillet, S.; Delannoy, J. -j.
发表日期	2024
EISSN	2333-5084
起始页码	11
结束页码	4
卷号	11 期号:4
英文摘要	Fragile geological features must undergo frequent structural health assessments to prevent catastrophic failure events. The mechanical behavior of natural sites is largely guided by vibrations of the earth and environmental exposure, but damage is rarely assessed, except empirically. The Chauvet-Pont d'Arc cave, a UNESCO World Heritage Site, represents a shining example of fragility that would benefit from monitoring. It is overhung by a rock column known as Abraham's pillar that extends out from the cliff like a natural tuning fork. For this study, we monitored dancing movements of this pillar for over 2 years to analyze its elastic response to weather conditions. Using ambient-seismic-noise-based methods, we identified the pillar's first two natural resonance modes. Through extensive monitoring of the site, we observed the striking temporal evolution of these two resonance frequencies on hourly, daily, seasonal, and pluriannual scales in response to changes in air temperature and insolation. Based on thermo-acousto-elastic modeling with a simplified 3D geometric structure, we determined how thermally-induced stress stiffening affects the rock material, by applying convective and radiative heat fluxes to the model. From the results obtained, we suggest a novel quantitative method based on daily observations that can estimate the level of damage within the rock material. Our work provides a foundation for distinguishing between reversible processes and damage for hazard studies in the frame of climate change. Such knowledge is crucial not only for the preservation of heritage sites but also for enhancing risk assessment protocols and informing conservation efforts worldwide. Rock columns are prominent geological features detaching from rock cliffs. The Chauvet-Pont d'Arc cave, a UNESCO World Heritage Site, is overhung by such a rock column called Abraham's pillar. By seismic sensors, we monitored vibrations of this pillar that continuously oscillates like a natural tuning fork. These vibrations are particularly amplified at two certain frequencies, called natural resonance frequencies, that are related to fixation conditions and health state of the pillar. Their values fluctuate along days and years, and this wandering is strongly linked with air temperature and solar heating over time. We modeled how temperature affects the mechanical properties of the rock material. Based on these results, we suggest a novel method that can estimate the daily level of damage within the rock material, paving the way to enhance rockfall hazard assessment and prevent catastrophic failures. The Chauvet-Pont d'Arc UNESCO site is overhung by a rocky pillar that has been monitored during more than 2 years Resonance frequencies of pillar's bending modes evolve with thermal forcings at daily and seasonal time scales Thermo-acoustoelasticity is used to model thermally-induced stresses and acoustoelastic parameters are proposed as a proxy of rock damage
英文关键词	environmental seismology; rock column; resonance frequency; thermal forcings; acoustoelasticity; rock damage
语种	英语
WOS研究方向	Astronomy & Astrophysics ; Geology
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS记录号	WOS:001206882700001
来源期刊	EARTH AND SPACE SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306492
作者单位	Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Institut de Recherche pour le Developpement (IRD); Universite Gustave-Eiffel; Universite Savoie Mont Blanc; Centre National de la Recherche Scientifique (CNRS); Universite Savoie Mont Blanc
推荐引用方式 GB/T 7714	Guillemot, A.,Audin, L.,Larose, E.,et al. A Comprehensive Seismic Monitoring of the Pillar Threatening the World Cultural Heritage Site Chauvet-Pont d'Arc Cave, Toward Rock Damage Assessment[J],2024,11(4).
APA	Guillemot, A..,Audin, L..,Larose, E..,Baillet, L..,Gueguen, P..,...&Delannoy, J. -j..(2024).A Comprehensive Seismic Monitoring of the Pillar Threatening the World Cultural Heritage Site Chauvet-Pont d'Arc Cave, Toward Rock Damage Assessment.EARTH AND SPACE SCIENCE,11(4).
MLA	Guillemot, A.,et al."A Comprehensive Seismic Monitoring of the Pillar Threatening the World Cultural Heritage Site Chauvet-Pont d'Arc Cave, Toward Rock Damage Assessment".EARTH AND SPACE SCIENCE 11.4(2024).