Seismic Bearing Capacity of Shallow Embedded Foundations on a Sloping Ground Surface

Chakraborty, Debarghya and Kumar, Jyant (2015) Seismic Bearing Capacity of Shallow Embedded Foundations on a Sloping Ground Surface. In: INTERNATIONAL JOURNAL OF GEOMECHANICS, 15 (1).

PDF int_jou_geo_15-1_2015.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

By using the lower-bound theorem of the limit analysis in conjunction with finite elements and nonlinear optimization, bearing-capacity factors, N-c and N-gamma q, with an inclusion of pseudostatic horizontal seismic body forces, have been determined for a shallow embedded horizontal strip footing placed on sloping ground surface. The variation of N-c and N-gamma q with changes in slope angle (beta) for different values of seismic acceleration coefficient (k(h)) has been obtained. The analysis reveals that irrespective of ground inclination and the embedment depth of the footing, the factors N-c and N-gamma q decrease quite considerably with an increase in k(h). As compared with N-c, the factor N-gamma q is affected more extensively with changes in k(h) and beta. Unlike most of the results reported in literature for the seismic case, the present computational results take into account the shear resistance of soil mass above the footing level. An increase in the depth of the embedment leads to an increase in the magnitudes of both N-c and N-gamma q. (C) 2014 American Society of Civil Engineers.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF GEOMECHANICS
Publisher:	ASCE-AMER SOC CIVIL ENGINEERS
Additional Information:	Copy right for this article belongs to the ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
Keywords:	Bearing capacity; Earthquakes; Failure; Limit analysis; Nonlinear optimization; Plasticity; Slopes
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	28 Feb 2015 07:09
Last Modified:	28 Feb 2015 07:09
URI:	http://eprints.iisc.ac.in/id/eprint/50934

Actions (login required)

View Item