Reliability assessment of internal stability of reinforced soil structures: A pseudo-dynamic approach

Basha, Munwar B and Babu, Sivakumar GL (2010) Reliability assessment of internal stability of reinforced soil structures: A pseudo-dynamic approach. In: Soil Dynamics and Earthquake Engineering, 30 (5). pp. 336-353.

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Abstract

A methodology for reliability based optimum design of reinforced soil structures subjected to horizontal and vertical sinusoidal excitation based on pseudo-dynamic approach is presented. The tensile strength of reinforcement required to maintain the stability is computed using logarithmic spiral failure mechanism. The backfill soil properties, geometric and strength properties of reinforcement are treated as random variables. Effects of parameters like soil friction angle, horizontal and vertical seismic accelerations, shear and primary wave velocities, amplification factors for seismic acceleration on the component and system probability of failures in relation to tension and pullout capacities of reinforcement have been discussed. In order to evaluate the validity of the present formulation, static and seismic reinforcement force coefficients computed by the present method are compared with those given by other authors. The importance of the shear wave velocity in the estimation of the reliability of the structure is highlighted. The Ditlevsen's bounds of system probability of failure are also computed by taking into account the correlations between three failure modes, which is evaluated using the direction cosines of the tangent planes at the most probable points of failure. (c) 2009 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Soil Dynamics and Earthquake Engineering
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Limit equilibrium method; Pseudo-dynamic method; Reinforced soil structures; Reliability index; Seismic design; System reliability
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	10 Jun 2010 09:20
Last Modified:	19 Sep 2010 05:59
URI:	http://eprints.iisc.ac.in/id/eprint/26991

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