335
Technical Committee 101 - Session II /
Comité technique 101 - Session II
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Figure 3. Indenter load-displacement curve for 50 mm-high specimens
Figure 4. Indenter load-displacement curve for 100 mm-high specimens
Figure 5. Indenter load-displacement curve for 150 mm-high specimens
Figure 6. The coefficient K vs. the indenter-to-specimen diameter ratio
0.2
0.25
0.3
0.35
0.4
12
14
16
18
20
22
a/b
q
u
/ q
t
H = 50 mm
H = 100 mm
H = 150 mm
0
0.2
0.4
0.6
0.8
0
5
10
15
20
25
axial displacement (mm)
axial force (N)
2a = 22.5 mm
2a = 28.1 mm
2a = 33.8 mm
Figure 7. The brittleness vs. the indenter-to-specimen diameter ratio
5 CONCLUSIONS
0
0.5
1
1.5
0
5
10
15
20
25
30
axial displacement (mm)
axial force (N)
2a = 22.5 mm
2a = 28.1 mm
2a = 33.8 mm
An indirect method for determining tensile strength of lightly
cemented sand was re-visited. The method is based upon an
upper bound solution to a split tension failure in limit analysis.
In order to assess the analytical solution, three different sizes of
indenters were used along with three different specimen heights.
As the coefficient
K
is a function of the developed
angle and
the brittleness ratio, evaluating
K
through a numerical iteration
is recommended.
6 ACKNOWLEDGEMENTS
The financial support from the National Science Council of
Taiwan under the contract of 101-2218-E-002-005- is greatly
appreciated.
0
0.5
1
1.5
2
0
10
20
30
40
axial displacement (mm)
axial force (N)
2a = 22.5 mm
2a = 28.1 mm
2a = 33.8 mm
7 REFERENCES
Das, B.M. and Dass, R.N. 1996. Lightly cemented sand in
tension and compression.
Geotechnical and Geological
Engineering
13, 169-177.
Tang, G. X., and Graham, J. 2000. A method for testing tensile
strength in unsaturated soils.
Geotechnical Testing Journal
23(3), 377-382.
Nahlawi, H., Chakrabarti, S., and Kodikara, J. 2004. A direct
tensile strength testing method for unsaturated geomaterials.
Geotechnical Testing Journal
27(4), 356-361.
Tamrakar, S.B., Mitachi, T. and Toyosawa, Y. 2007.
Measurement of soil tensile strength and factors affecting its
measurements.
Soils and Foundations
47(5), 911-918.
Zeh R.M. and Witt, K.J. 2007. The tensile strength of
compacted clays as affected by suction and soil structure.
In:
Experimental Unsaturated Soil Mechanics
, Edt. T.
Schanz, Springer-Verlag, Berlin, Heidelberg, 219-226.
0.2
0.25
0.3
0.35
0.4
0
1
2
3
4
a/b
K
H = 50 mm
H = 100 mm
H = 150 mm
Chen, W.F. 2007.
Limit Analysis and Soil Plasticity
(electronic
resource). J. Ross Publication, Fort Lauderdale, FL.
Originally published in 1975, Elsevier, Amsterdam.
Fang, H.Y. and Chen, W.F. 1972. New method for
determination of tensile strength of soils.
Highway Research
Record
, 354, 62-68.
Fang, H.Y., and Fernandez, F. 1981, Determination of tensile
strength of soils by unconfined-penetration test.
ASTM STP
740
, 130-144.
Kim, T.-H, Kim, T.-H, Kang, G-C, and Ge, L. 2012. Factors
influencing crack-induced tensile strength of compacted
soil.
Journal of Materials in Civil Engineering
24(3), 315-
320.
