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A numerical approach for liquefaction potential definition

Vessia, G; Arias-Trujillo, J; Lopez-Querol, MS; Cherubini, C; Blazquez, R; Fotti, D; (2008) A numerical approach for liquefaction potential definition. In: Proceedings Of The Fourteenth World Conference On Earthquake Engineering Beijing, China, 2008. International Association for Earthquake Engineering Green open access

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Abstract

Liquefaction phenomenon in saturated granular soil is not that frequent as amplification cases but can cause heavy damages on buildings and infrastructures whenever is occurs especially within superficial strata. In fact the lack of shear resistance of soil due to liquefaction affects mostly shallow foundations and road surfaces. Up now, several studies have been addressed to overpass the inadequacy of liquefaction safety factor by means of introducing the liquefaction potential. Nevertheless, the difficulty in (1) defining a scale of damage related to liquefaction potential values and (2) collecting field data from damages caused prevalently by liquefaction makes the punctual factor of safety still popular in engineering practice. In this paper a new approach to liquefaction potential estimation is proposed based on finite element dynamic analyses and on the concept of “significant volume” according to possible effects suffered by shallow foundations. One-dimensional simulation of liquefaction occurrence is performed by means of the Pastor-Zienkiewicz constitutive law. Hence the estimation of liquefaction potential is gained as well as the stress influence factor from Westergaard solution is calculated.

Type: Proceedings paper
Title: A numerical approach for liquefaction potential definition
Event: The 14th World Conference on Earthquake Engineering (14WCEE)
Location: Beijing, China
Dates: 11 October 2008 - 14 October 2008
Open access status: An open access version is available from UCL Discovery
Publisher version: http://www.iitk.ac.in/nicee/wcee/fourteenth_conf_c...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Liquefaction potential, Pastor-Zienkiewicz constitutive law, granular soil
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1539948
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