A thermo-mechanical model for the catastrophic collapse of large landslides

Cecinato, F; Zervos, A; Veveakis, E

dc.contributor.author	Cecinato, F	en
dc.contributor.author	Zervos, A	en
dc.contributor.author	Veveakis, E	en
dc.date.accessioned	2014-03-01T01:35:03Z
dc.date.available	2014-03-01T01:35:03Z
dc.date.issued	2011	en
dc.identifier.issn	0363-9061	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20952
dc.subject	Constitutive modeling	en
dc.subject	Landslide dynamics	en
dc.subject	Numerical analysis	en
dc.subject	Thermal pressurization	en
dc.subject	Thermo-mechanics	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Mechanics	en
dc.subject.other	Constitutive law	en
dc.subject.other	Constitutive modeling	en
dc.subject.other	Dynamic evolution	en
dc.subject.other	Heat production	en
dc.subject.other	Pore-pressure generation	en
dc.subject.other	Pore-water pressures	en
dc.subject.other	Sliding materials	en
dc.subject.other	Slip zones	en
dc.subject.other	Soil skeleton	en
dc.subject.other	Temperature rise	en
dc.subject.other	Thermal pressurization	en
dc.subject.other	Thermo-mechanical	en
dc.subject.other	Thermo-mechanical behaviors	en
dc.subject.other	Thermo-mechanics	en
dc.subject.other	Thermomechanical model	en
dc.subject.other	Time windows	en
dc.subject.other	Time-scales	en
dc.subject.other	Water expansion	en
dc.subject.other	Friction	en
dc.subject.other	Landslides	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Pore pressure	en
dc.subject.other	Pressurization	en
dc.subject.other	Sensitivity analysis	en
dc.subject.other	Geologic models	en
dc.subject.other	collapse structure	en
dc.subject.other	constitutive equation	en
dc.subject.other	numerical model	en
dc.subject.other	pore pressure	en
dc.subject.other	porewater	en
dc.subject.other	pressure effect	en
dc.subject.other	temperature effect	en
dc.subject.other	thermomechanics	en
dc.subject.other	Italy	en
dc.subject.other	Vajont Valley	en
dc.title	A thermo-mechanical model for the catastrophic collapse of large landslides	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/nag.963	en
heal.identifier.secondary	http://dx.doi.org/10.1002/nag.963	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	In this work, a new thermo-mechanical model is developed, applicable to large-scale, deep-seated landslides consisting of a coherent mass sliding on a thin clayey layer. The considered time window is that of catastrophic acceleration, starting at incipient failure and ending when the acquired displacement and velocity are such that the sliding material begins to break up into pieces. The model accounts for temperature rise in the slip zone due to the heat produced by friction, leading to water expansion, thermoplastic collapse of the soil skeleton, and subsequent increase of pore water pressure. The model incorporates the processes of heat production and diffusion, pore pressure generation and diffusion, and an advanced constitutive law for the thermo-mechanical behavior of soil. An analysis of the Vajont landslide is presented as an example. A sensitivity analysis shows that friction softening is the mechanism most affecting the timescale of the final collapse of a slide, but also that the mechanism of thermal pressurization alone can cause a comparably catastrophic dynamic evolution. It is also shown that, all other factors being equal, thermo-mechanical collapse will cause thicker slides to accelerate faster than shallow ones. Copyright (C) 2010 John Wiley & Sons, Ltd.	en
heal.publisher	WILEY-BLACKWELL	en
heal.journalName	International Journal for Numerical and Analytical Methods in Geomechanics	en
dc.identifier.doi	10.1002/nag.963	en
dc.identifier.isi	ISI:000295225500001	en
dc.identifier.volume	35	en
dc.identifier.issue	14	en
dc.identifier.spage	1507	en
dc.identifier.epage	1535	en