Seismic Bearing Capacity of Shallow Embedded Foundations on a Sloping Ground Surface
Publication: International Journal of Geomechanics
Volume 15, Issue 1
Abstract
By using the lower-bound theorem of the limit analysis in conjunction with finite elements and nonlinear optimization, bearing-capacity factors, and , 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 and with changes in slope angle () for different values of seismic acceleration coefficient () has been obtained. The analysis reveals that irrespective of ground inclination and the embedment depth of the footing, the factors and decrease quite considerably with an increase in . As compared with , the factor is affected more extensively with changes in and . 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 and .
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© 2014 American Society of Civil Engineers.
History
Received: Sep 2, 2013
Accepted: Mar 5, 2014
Published online: Apr 3, 2014
Published in print: Feb 1, 2015
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