Effect of Nonuniform Stresses on Measured DSS Stress‐Strain Behavior
Publication: Journal of Geotechnical Engineering
Volume 120, Issue 5
Abstract
This paper presents results of a laboratory investigation of the influence of the nonuniform stresses imposed by the Geonor direct simple‐shear (DSS) apparatus on measured stress‐strain behavior. The investigation concentrated on the influence of the apparatus on the measured strain‐softening behavior of cohesive soils during constant volume (undrained) shear. Special DSS tests were conducted on an elastic material and cohesive soils at varying overconsolidation ratios. The experimental results clearly indicate that the nonuniformity of stresses imposed by the device during undrained shear causes a decrease in the vertical effective stress with increasing shear strain. This in turn causes a reduction in the measured horizontal shear resistance at large strains. The device‐induced “unloading” probably has relatively little effect on measured peak strengths in K0 consolidated‐undrained DSS tests but certainly contributes to the pronounced strain softening typically observed.
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References
1.
Ahmed, I. (1990). “Investigation of normalized behavior of resedimented Boston Blue clay using the Geonor direct simple shear apparatus,” MS thesis, Massachusetts Inst. of Tech., Cambridge, Mass.
2.
Airey, D. W., Budhu, M, and Wood, D. M. (1985). “Some aspects of behavior of soils in simple shear.” Developments in soil mechanics and foundation engineering, 2, Elsevier, London, England.
3.
Airey, D. W., and Wood, D. M. (1984). “Discussion of ‘Specimen size effect in simple shear test,’ by M. Vucetic and S. Lacasse.” J. Geotech. Engrg. Div., ASCE, 110(3), 439–442.
4.
Airey, D. W., and Wood, D. M. (1987). “An evaluation of direct simple shear tests on clay.” Géotechnique, 37(1), 25–35.
5.
American Society for Testing and Materials. (1989). Annual book of ASTM standards: section 9 rubber, ASTM, Philadelphia, Pa.
6.
Bjerrum, L. (1954). “Theoretical and experimental investigations on the shear strength of soils.” Publication No. 5, Norwegian Geotechnical Institute, Oslo, Norway.
7.
Bjerrum, L., and Landva, A. (1966). “Direct simple shear tests on Norwegian quick clay.” Géotechnique, 16(1), 1–20.
8.
Budhu, M. (1984a). “Discussion of ‘Specimen size effect in simple shear test,’ by M. Vucetic and V. Lacasse.” J. Geotech. Engrg. Div., ASCE, 110(3), 442–445.
9.
Budhu, M. (1984b). “Non‐uniformities imposed by simple shear apparatus.” Can. Geotech.J., 21(1), 125–137.
10.
DeGroot, D. J. (1989). “The multidirectional direct simple shear apparatus with application to design of offshore arctic structures,” ScD thesis, Massachusetts Inst. of Tech., Cambridge, Mass.
11.
DeGroot, D. J., Germaine, J. T., and Gedney, R. (1991). “An automated electropneumatic control system for direct simple shear testing.” Geotech. Test. J., 14(4), 339–348.
12.
DeGroot, D. J., Germaine, J. T., and Ladd, C. C. (1993). “The multidirectional direct simple shear apparatus.” Geotech. Test. J., 16(3), 283–295.
13.
DeGroot, D. J., Ladd, C. C, and Germaine, J. T. (1992). “Direct simple shear testing of cohesive soils.” Res. Report No. R92‐18, Ctr. for Scientific Excellence in Offshore Engrg., Dept. of Civ. Engrg., Massachusetts Inst. of Tech., Cambridge, Mass.
14.
Duncan, J. M., and Dunlop, P. (1969). “Behavior of soils in simple shear.” Proc., 7th Int. Conf. Soil Mech. Foundation Engrg., Mexico, 1, 101–109.
15.
Dyvik, R., Berre, T., Lacasse, S., and Raadim, B. (1987). “Comparison of truly undrained and constant volume direct simple shear tests.” Géotechnique, 37(1), 3–10.
16.
Ladd, C. C. (1991). “Stability evaluation during staged construction: the 22nd Karl Terzaghi lecture.” J. Geotech. Engrg., ASCE, 117(4), 540–615.
17.
Ladd, C. C, and Edgers, L. (1972). “Consolidated‐undrained direct simple shear tests on saturated clays.” Res. Report R72‐82, No. 284, Dept. of Civ. Engrg., Massachusetts Inst. of Tech., Cambridge, Mass.
18.
Ladd, C. C., and Foott, R. (1974). “New design procedure for stability of soft clays.” J. Geotech. Engrg. Div., ASCE, 100(7), 763–786.
19.
Malek, A. M. (1987). “Cyclic behavior of clay in undrained simple shearing and pplication to offshore tension piles,” ScD thesis, Massachusetts Inst. of Tech., Cambridge, Mass.
20.
Roscoe, K. H. (1953). “An apparatus for the application of simple shear to soil samples.” Proc., 3rd Int. Conf. Soil Mech. Foundation Engrg., London, 1, 186–191.
21.
Taylor, D. W. (1953). “A direct shear test with drainage control.” ASTM STP 131, 63–74.
22.
Vucetic, M., and Lacasse, S. (1982). “Specimen size effect in simple shear test.” J. Geotech. Engrg. Div., ASCE, 108(12), 1567–1585.
23.
Vucetic, M., and Lacasse, S. (1984). “Specimen size effect in simple shear test: closure.” J. Geotech. Engrg., ASCE, 110(3), 439–453. in Offshore Engrg., Dept. of Civ. Engrg., Massachusetts Inst. of Tech., Cambridge, Mass.
24.
Duncan, J. M., and Dunlop, P. (1969). “Behavior of soils in simple shear.” Proc., 7th Int. Conf. Soil Mech. Foundation Engrg., Mexico, 1, 101–109.
25.
Dyvik, R., Berre, T., Lacasse, S., and Raadim, B. (1987). “Comparison of truly undrained and constant volume direct simple shear tests.” Géotechnique, 37(1), 3–10.
26.
Ladd, C. C. (1991). “Stability evaluation during staged construction: the 22nd Karl Terzaghi lecture.” J. Geotech. Engrg., ASCE, 117(4), 540–615.
27.
Ladd, C. C, and Edgers, L. (1972). “Consolidated‐undrained direct simple shear tests on saturated clays.” Res. Report R72‐82, No. 284, Dept. of Civ. Engrg., Massachusetts Inst. of Tech., Cambridge, Mass.
28.
Ladd. C. C., and Foott, R. (1974). “New design procedure for stability of soft clays. ”J. Geotech. Engrg. Div., ASCE, 100(7), 763–786.
29.
Malek, A. M. (1987). “Cyclic behavior of clay in undrained simple shearing and application to offshore tension piles,” PhD thesis, Massachusetts Inst. of Tech., Cambridge, Mass.
30.
Roscoe, K. H. (1953). “An apparatus for the application of simple shear to soil samples.” Proc., 3rd Int. Conf. Soil Mech. Foundation Engrg., London, 1, 186–191.
31.
Taylor, D. W. (1953). “A direct shear test with drainage control.” ASTM STP 131, 63–74.
32.
Vucetic, M., and Lacasse, S. (1982). “Specimen size effect in simple shear test.” J. Geotech. Engrg. Div., ASCE, 108(12), 1567–1585.
33.
Vucetic, M., and Lacasse, S. (1984). “Specimen size effect in simple shear test: closure.” J. Geotech. Engrg., ASCE, 110(3), 439–453.
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Copyright © 1994 American Society of Civil Engineers.
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Received: Feb 25, 1994
Published online: May 1, 1994
Published in print: May 1994
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