Seismic reliability assessment of external stability of reinforced soil walls using pseudo-dynamic method

Basha, BM and Babu, GLS (2009) Seismic reliability assessment of external stability of reinforced soil walls using pseudo-dynamic method. In: Geosynthetics International, 16 (3). pp. 197-215.

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Abstract

The paper presents a method for the evaluation of external stability of reinforced soil walls subjected to earthquakes in the framework of the pseudo-dynamic method. The seismic reliability of the wall is evaluated by considering the different possible failure modes such as sliding along the base, overturning about the toe point of the wall, bearing capacity and the eccentricity of the resultant force. The analysis is performed considering properties of the reinforced backfill, foundation soil below the base of the wall, length of the geosynthetic reinforcement and characteristics of earthquake ground motions such as shear wave and primary wave velocity as random variables. The optimum length of reinforcement needed to maintain stability against four modes of failure by targeting various component reliability indices is obtained. Differences between pseudo-static and pseudo-dynamic methods are clearly highlighted in the paper. A complete analysis of pseudo-static and pseudo-dynamic methodologies shows that the pseudodynamic method results in realistic design values for the length of geosynthetic reinforcement under earthquake conditions.

Item Type:	Journal Article
Publication:	Geosynthetics International
Publisher:	Thomas Telford
Additional Information:	Copyright of this article belongs to Thomas Telford.
Keywords:	Geosynthetics;Limit equilibrium method;Pseudo-dynamic method;Pseudo-staticmethod;Target reliability.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	04 Jan 2010 06:53
Last Modified:	19 Sep 2010 05:36
URI:	http://eprints.iisc.ac.in/id/eprint/21129

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