Sara Osman, Mark Thomas, Julia Crummy, Anna Sharp, Steve Carver
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引用次数: 0
Abstract
Abstract Following explosive eruptions, loading from tephra fall deposits can lead to roof collapse. However, the load may be reduced significantly by tephra sliding on pitched roofs. We present small-scale laboratory tests to investigate tephra sliding behaviour on metal, fibre cement sheet and tile roofing. We tested 10–30 cm thicknesses for dry and wet deposits of pumice, scoria and basaltic ash. We found that tephra did not slide on roof pitches ≤ 15° for coarse-grained deposits and ≤ 12° for dry ash. Thin deposits of wet ash were stable at pitches ≤ 30°. In addition, tephra was mainly shed on pitches ≥ 32° for metal roofs and ≥ 35° for fibre cement and tiles. Using these results, we have produced an initial set of sliding coefficients for tephra for simply pitched roofs that can be used to help prioritise roofs for clearing during an eruption and assist in designing roofs to withstand tephra fall.
期刊介绍：
Journal of Applied Volcanology is an international journal with a focus on applied research relating to volcanism and particularly its societal impacts. Characterising volcanic impacts and associated risk relies on not only quantifying physical threat but also understanding social and physical vulnerability and resilience. The broad aim of volcanologists in this domain is to increase public resilience to volcanic risk via research that reduces both human fatalities and volcanic impacts on livelihoods, infrastructure, and the economy. Journal of Applied Volcanology fills an important gap for scientists who want to publish research that addresses this aim and wish to reach a broad audience. The journal has a holistic view of the relationship between volcanoes and society, and therefore welcomes intra- cross- multi- inter- and transdisciplinary articles that deal with volcanoes and society. Research topics covered by the journal include: the impacts of eruptions on communities; methods for risk analysis; risk management; community preparedness, response to and recovery from volcanic hazard events; health issues related to volcanism; social adaptation to volcanic hazards; policy and institutional aspects of volcanic risk management; applications of physical volcanology, geophysics and remote sensing to volcanic crisis mitigation. The journal aims for rapid publication of high-impact research and review papers.
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