Soil inertial factors for seismic bearing capacity

Earthquake loadings can reduce the ultimate bearing capacity of shallow foundations due to the imposition of transient horizontal loads and moments arising from the inertia of the supported structure, inertial forces in the soil mass and strength reduction in the founding materials due to rapid cycl...

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Bibliographic Details
Published in:Proceedings of the Institution of Civil Engineers. Geotechnical engineering 2019-02, Vol.172 (1), p.4-15
Main Authors: Hokmabadi, Aslan S., Leung, Erin H. Y., Pappin, Jack W.
Format: Article
Language:English
Subjects:
Airports
Bearing capacity
Cyclic loading
Cyclic loads
Earthquakes
Forces (mechanics)
Horizontal loads
Inertia
Materials fatigue
Mathematical analysis
Seismic activity
Seismic design
Shallow foundations
Site planning
Soil
Soil bearing capacity
Soil strength
Soils
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Summary:Earthquake loadings can reduce the ultimate bearing capacity of shallow foundations due to the imposition of transient horizontal loads and moments arising from the inertia of the supported structure, inertial forces in the soil mass and strength reduction in the founding materials due to rapid cyclic loading. In this paper, the general bearing capacity equation is used to calculate the seismic bearing capacity of shallow foundations. To account for the effect of inertial forces in the soil mass, soil inertial factors for level and sloping ground are recommended and their significance to the seismic bearing capacity is assessed. This paper provides a straightforward method to calculate seismic bearing capacity for the seismic design of shallow foundations within the limitations of pseudo-static analysis.
ISSN:1353-2618
1751-8563
DOI:10.1680/jgeen.17.00194