Abstract
The seismic bearing capacity of partially liquefiable saturated sand is investigated by numerical analysis. An empirical correlation in the literature assumes a punching shear mechanism, which underestimates the seismic bearing capacity due to omission of the q-term. In this paper, the effects of the footing width, soil relative density, foundation depth, and maximum seismic acceleration on the seismic bearing capacity of partially liquefiable saturated sands are investigated. The results show that the foundation depth has a remarkable effect on the seismic bearing capacity. Hence, the failure mode is not likely punching. The seismic bearing capacity of partially liquefiable saturated sands is redefined with new seismic bearing capacity factors, Nq and Nγ. The paper presents also a guideline to estimate the allowable seismic bearing capacity considering both the ultimate and serviceability limit states.
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