bearing.nq_vesic()

Vesic bearing capacity factor on vertical effective stress.

Usage

Source

bearing.nq_vesic(
    phi,
    irr,
    k0=None,
)

Parameters

phi: array_like

Friction angle, deg.

irr: array_like

Reduced rigidity index.

k0: array_like = None

At-rest earth pressure coefficient; 1 - sin(phi) by default.

Returns

ndarray

N_q* = N_sigma (1 + 2 K0) / 3 with N_sigma = 3 / (3 - sin phi) exp((pi/2 - phi) tan phi) tan^2(45 + phi/2) Irr^(4 sin phi / (3 (1 + sin phi))).

References

Vesic (1977).