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Seismic bearing capacity factors for spread foundations

Kumar, J and Rao, Mohan VBK (2002) Seismic bearing capacity factors for spread foundations. In: Geotechnique, 52 (2). pp. 79-88.

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The effect of horizontal earthquake body forces on the bearing capacity of foundations has been examined computationally in a rigorous manner by employing the method of stress characteristics. The bearing capacity factors N-c, N-q and N-y, due to the components of soil cohesion, ground surcharge pressure and soil unit weight respectively, have been plotted as a function of earthquake acceleration coefficient (a(h)) for different values of soil friction angle (phi). The inclusion of earthquake body forces causes a considerable reduction in the bearing capacity factors. The bearing capacity factors N-c and N-q are seen to be approximately of the same magnitude as those reported in the literature on the basis of different solution methods. However, the obtained values of N-y are found to be significantly smaller than the available results. The nature of the pressure distribution along the footing base and the geometry of the observed failure patterns vary with the consideration of earthquake body forces.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Thomas Telford.
Keywords: numerical modelling and analysis;foundations;failure;bearing capacity;earthquakes;plasticity
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Depositing User: Ms V Mangala
Date Deposited: 28 Jul 2011 07:18
Last Modified: 28 Nov 2018 15:15
URI: http://eprints.iisc.ac.in/id/eprint/39393

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