Cyclic Triaxial Tests on Remoulded Clays
Publication: Journal of Geotechnical Engineering
Volume 110, Issue 10
Abstract
Data are presented from cyclic triaxial tests on remoulded clays with load or displacement control. The ability of simple load control tests to predict strains developed in complex (storm profile) tests is found inadequate. It is suggested that only the minimum cyclic stress ratio associated with the fully weakened state has any direct design relevance. The minimum cyclic stress ratio varies with frequency. If data from load controlled tests are re‐analyzed to account for rate effects on shear strength then a constant value independent of frequency is observed. However, measurement is approximate and requires several extended tests. It is found that the fully weakened state for the soil tested can be achieved in a single displacement controlled test provided that 10,000 cycles at a mean double amplitude strain of at least 5% are applied. Irrespective of data re‐analysis, the minimum cyclic stress ratio measured in a single displacement controlled test is constant for frequencies less than 1/5 Hz. Within this limit the values of this parameter obtained from the two test modes agree to within 10%.
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References
1.
Andersen, K. H., “Behaviour of Clay Subjected to Undrained Cyclic Loading,” Proceedings, International Conference on the Behaviour of Off‐Shore Structures, BOSS'76, Trondheim, Norway, Vol. 1, 1976, pp. 392–403.
2.
Andersen, K. H., and Stenhamar, P., “Static Plate Loading Tests on Overconsolidated Clay,” Journal of the Geotechnical Engineering Division, ASCE, Vol. 108, No. GT7, July, 1982, pp. 918–934.
3.
Barden, L., and Khayatt, A. J., “Incremental Strain Rate Ratios and the Strength of Sand in the Triaxial Test,” Geotechnique, London, England, Vol. 16, 1966, pp. 338–357.
4.
Bishop, A. W., and Henkel, D. J., The Measurement of Soil Properties in the Triaxial Test, Edward Arnold Ltd., London, England, 1962.
5.
Craig, W. H., “Strain Rate and Viscous Effects in Physical Models,” Proceedings, International Conference on Soil Dynamics and Earthquake Engineering, Southampton, England, Vol. I, July, 1982, pp. 351–365.
6.
Khaffaf, J. H., “The Behaviour of Saturated Undrained Clay under Cyclic Loading Conditions,” thesis presented to the University of Manchester, at Manchester, England, in 1975, in partial fulfillment of the requirements for the degree of Master of Science.
7.
Khaffaf, J. H., “Weakening of Undrained Saturated Clays under Cyclic Triaxial Stress,” thesis presented to the University of Manchester, at Manchester, England, in 1978, in partial fulfillment of the requirements for the degree of Doctor of Engineering.
8.
McDermott, R. J. W., “The Use of Free Ends in the Triaxial Testing of Clay,” thesis presented to the University of Manchester, at Manchester, England, in 1965, in partial fulfillment of the requirements for the degree of Master of Science.
9.
“Research Project. Repeated Loading on Clay. Summary and Interpretation of Test Results,” Research Report 74037‐9, Norwegian Geotechnical Institute, 1975.
10.
Rowe, P. W., “The Relevance of Soil Fabric to Site Investigation Practice,” Twelfth Rankine Lecture, The Institution of Civil Engineers, London, England, 1972.
11.
Rowe, P. W., and Barden, L., “Importance of Free Ends in the Triaxial Test,” Journal of the Soil Mechanics Division, ASCE, Vol. 90, No. SM1, 1964, pp. 1–27.
12.
Rowe, P. W., and Barden, L., “A New Consolidation Cell,” Geotechnique, London, England, Vol. 16, No. 2, June, 1966, pp. 162–170.
13.
Sangrey, D. A., Henkel, D. J., and Esrig, M. I., “The Effective Stress Response of a Saturated Clay Soil to Repeated Loading,” Canadian Geotechnical Journal, Vol. 6, 1969, pp. 241–252.
14.
Seed, H. B., and Chan, C. K., “Clay Strength under Earthquake Loading Conditions,” Journal of Soil Mechanics and Foundations Division, ASCE, Vol. 92, No. SM2, 1966, pp. 53–78.
15.
Taylor, P. W., and Bacchus, D. R., “Dynamic Cyclic Strain Tests on a Clay,” Proceedings, 7th International Conference on Soil Mechanics and Foundation Engineering, Mexico, Vol. 1, 1969, pp. 401–409.
16.
Taylor, P. W., and Hughes, J. M. O., “Dynamic Properties of Foundation Subsoils as Determined from Laboratory Tests,” Proceedings, 3rd World Conference on Earthquake Engineering, New Zealand, Vol. 1, 1965, pp. 196–212.
17.
Thiers, G. R., and Seed, H. B., “Strength and Stress‐Strain Characteristics of Clays Subjected to Seismic Loading Conditions,” ASTM Special Technical Publication 450, Vibration Effects of Earthquakes on Soils and Foundations: A Symposium, American Society for Testing and Materials, San Francisco, Calif., 1968, pp. 3–56.
Information & Authors
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Published In
Journal of Geotechnical Engineering
Volume 110 • Issue 10 • October 1984
Pages: 1431 - 1445
Copyright
Copyright © 1984 ASCE.
History
Published online: Oct 1, 1984
Published in print: Oct 1984
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