Horizontal bearing capacity
The foundation horizontal bearing capacity is verified according to the factor of safety:
where Rdh depends on the subsoil type (selected in the "Settings" frame):
- Analysis for drained conditions:
- Analysis for undrained conditions:
and:
Where: | ψ | - | angle of friction between the foundation and the soil |
a | - | cohesion between the foundation and the soil | |
Aef | - | effective area of the foundation | |
Hx,Hy | - | components of the horizontal force | |
Q | - | extreme design vertical force | |
SF | - | safety factor for the horizontal bearing capacity (input in the "Analysis" frame) |
The angle of friction between foundation and soil ψ is recommended:
- For cast in place foundations:
- For prefabricated foundations:
where: | φ | - | angle of internal friction of soil in footing bottom |
Literature:
NF P94-261