Manual utilizator Slope - GeoStru Software

NORMATIVE 26
experience.
6.5.3 Sliding resistance
1. Where the loading is not normal to the foundation base, foundations shall be
checked against failure by sliding on the base.
2. The following inequality shall be satisfied:
H d
= S d
+ E p d
[6.2]
3. H d
shall include the design values of any active earth forces imposed on the
foundation.
4.R d
shall be calculated according to 2.4.
5.The values of R d
and R p;d
should be related to the scale of movement
anticipated under the limit state of loading considered. For large movements,
the possible relevance of post-peak behaviour should be considered. The value
of R p;d
selected should reflect the anticipated life of the structure.
6.For foundations bearing within the zone of seasonal movements of clay soils,
the possibility that the clay could shrink away from the vertical faces of
foundations shall be considered.
7.The possibility that the soil in front of the foundation may be removed by
erosion or human activity shall be considered.
8.For drained conditions, the design shear resistance, R d , shall be calculated
either by factoring the ground properties or the ground resistance as follows;
R d
= V' d
tan δ d
(6.3a)
or
R d
= (V’ d
tan δ k
) / γ R;h
(6.3b)
Note In design procedures where the effects of actions are factored, the partial
factor for the actions (γ F
) is 1,0 and V’ d
= V’ k
in equation (6.3b).
9. In determining V d
', account shall be taken of whether H d
and V' d
are
dependent or independent actions.
10.The design friction angle δ d may be assumed equal to the design value of
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