foundation system of burj al arab

Earthquake Influence on Bearing Capacity of Foundation Soil (Part-1)

We know building codes uses intensity of earthquake for a designed area rather than earthquake magnitude. Depending on intensity of earthquake, different zones are created for a given region. For each zones there have a specified earthquake zone factor. Zone factors are derived from the risk categories of a region.


We know a bigger earthquake have a larger intensity associated with a greater earthquake co-efficient or seismic coefficient. In this post we will learn how earthquake impacts on bearing capacity. At first we will know basic equation for determining bearing capacity in static condition. The ultimate bearing capacity for a bearing stratum is determine by Nc, Nq, Nϒ, the angle of shearing resistance and cohesion of soil.
Earthquake foundation failure resulting tilted building
One thing is added in case of seismic bearing capacity is modification factors for bearing capacity which are depend on angle of shearing resistance of soil, φ. We will provide an example to determine ultimate bearing capacity of the soil using these modification factors. 
 
Earthquake Influence on Bearing Capacity of Foundation Soil (Part-2)

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