Reliability-based load and resistance factor design approach for external seismic stability of reinforced soil walls

Basha, Munwar B and Babu, Sivakumar GL (2014) Reliability-based load and resistance factor design approach for external seismic stability of reinforced soil walls. In: SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, 60 . pp. 8-21.

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Abstract

Load and resistance factor design (LRFD) approach for the design of reinforced soil walls is presented to produce designs with consistent and uniform levels of risk for the whole range of design applications. The evaluation of load and resistance factors for the reinforced soil walls based on reliability theory is presented. A first order reliability method (FORM) is used to determine appropriate ranges for the values of the load and resistance factors. Using pseudo-static limit equilibrium method, analysis is conducted to evaluate the external stability of reinforced soil walls subjected to earthquake loading. The potential failure mechanisms considered in the analysis are sliding failure, eccentricity failure of resultant force (or overturning failure) and bearing capacity failure. The proposed procedure includes the variability associated with reinforced backfill, retained backfill, foundation soil, horizontal seismic acceleration and surcharge load acting on the wall. Partial factors needed to maintain the stability against three modes of failure by targeting component reliability index of 3.0 are obtained for various values of coefficients of variation (COV) of friction angle of backfill and foundation soil, distributed dead load surcharge, cohesion of the foundation soil and horizontal seismic acceleration. A comparative study between LRFD and allowable stress design (ASD) is also presented with a design example. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
Publisher:	ELSEVIER SCI LTD
Additional Information:	copyright for this article belongs to ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	Load factors; Load resistance factor design; Limit states; Reliability analysis; Resistance factors; Reinforced soil wall
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	09 Jun 2014 09:33
Last Modified:	09 Jun 2014 09:33
URI:	http://eprints.iisc.ac.in/id/eprint/49225

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