31 Dec 93
Figure A-7. Modeling of uplift pressures
stresses resulting from pore pressures are isolated
from the rest of the mesh by master and slave
nodes. This allows for a discontinuity in the nor-
In the absence of pore pressures, the effective and
mal stresses on shared element boundaries for ele-
total stresses are identical.
ments with and without initial stresses. The stresses
computed in the elements subject to initial stresses
σ0 are the effective stresses σ′; total stresses σ are
(c) Computation of stress intensity factors.
Stress intensity factors (KI for opening mode I, and
obtained by adding the initial and effective stresses