8.12.3 Vesic Method
The Vesic method is a slight modification of FHWA method. Skin friction calculation for Vesic method is same as that of FHWA method.
End bearing Resistance Calculation
End bearing is calculated from geometry of pier.
RB=qmax Ap
For cohesive soils, unit end bearing capacity is calculated based on
q = Fr Ncp*su
su = design value for undrained shear strength for the layer being considered
For cohesionless soils, unit end bearing capacity is calculated based on:
q = po* Nqp
po = effective overburden pressure lb/ft2 (kPa) at the point in question