3442
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
(13)
1
m
B
D
n
f
2
(14)
The experimental values of
RF
defined by Eq. (10) are
shown in Col. 5 of Table 1. For comparison purposes, the
predicted values of the reduction factor
RF
obtained using Eqs.
(10), (12), (13) and (14) are shown in Col. 6 of Table 3. The
deviations of the predicted values of
RF
from those obtained
experimentally are shown in Col. 7 of Table 3. In most cases the
deviations are
15% or less; however, in some cases, the
deviations were about 25%. Thus Eqs. (10), (12), (13) and (14)
provide reasonable good and simple approximations to estimate
the ultimate bearing capacity of strip foundations (0
D
f
/
B
1)
subjected to inclined eccentric loading. Or, for a given
D
f
/
B
,
) /
(2
)0 , , /
(
) , , /
(
1
21
BD
eBDu
eBDu
f
f
f
B
e
q
q
(15)
5 CONCLUSIONS
The results of a number of laboratory model tests conducted to
determine the ultimate bearing capacity of a strip foundation
supported by sand and subjected to an eccentrically inclined
load with an embedment ratio varying from zero to one have
been reported. Tests were conducted on dense sand. The load
eccentricity ratio
e
/
B
was varied from zero to 0.15, and the load
inclination
was varied from zero to 20° (i.e.
/
0 to 0.5).
Based on the test results and within the range of parameters
tested, an empirical relationship for a reduction factor
RF
has
been proposed [Eq. (15)]. A comparison between the reduction
factors obtained from the empirical relationships and those
obtained experimentally shows, in general, a variation of
15%
or less. In a few cases, the deviation was about 25 to 30%.
6 REFERENCES
Janbu, N. 1957. Earth pressures and bearing capacity calculations by
generalized procedure of slices.
Proceedings, IV International
Conference on Soil Mechanics and Foundation Engineering
,
London, 2, 207-211.
Meyerhof, G.G. 1963. Some recent research on the bearing capacity of
foundations.
Canadian Geotechnical Journal
, 1 (1), 16-26.
Purkayastha, R.D. and Char, R.A.N. 1977. Stability analysis for
eccentrically loaded footings.
Journal of the Geotechnical
Engineering Division
, ASCE, 103 (6), 647-651.
Saran, S. and Agarwal, R.K. 1991. Bearing capacity of eccentrically
oblique loaded foundation.
Journal of Geotechnical Engineering
,
ASCE, 117 (11), 1669-1690.
