Analysis of Seismic Bearing Capacity
Seismic bearing capacity of shallow foundation is calculated according to the following formula:
where: | pLE | - | seismic bearing capacity |
c | - | cohesion of soil | |
γ | unit weight of soil | ||
d | depth of footing bottom | ||
B | width of foundation | ||
NCE, NqE, NγE | - | seismic bearing factors |
where: | KAE, KPE | - | seismic coefficients of earth pressures |
ρAE | - | angle of failure | |
φ | angle of internal friction |
where: | kh | - | seismic coefficient of horizontal acceleration |
kv | - | seismic coefficient of vertical acceleration |
Note: If the angle α is negative, i.e. φ < θ, then the seismic bearing capacity is pLE = 0.
References:
Richards Jr., R.; et al. SEISMIC BEARING CAPACITY AND SETTLEMENTS OF FOUNDATION. J.Geotech. Engrg. 1993, 4 (119)
Das, B. M. Principles of Soil Dynamics, 3rd ed.; California State University: Sacramento, 2016.