Undrained Cyclic Shear Behavior of a Low Plasticity Alluvial Silt
Publication: Geo-Congress 2023
ABSTRACT
The undrained cyclic shear behavior of low-plasticity, fine-grained soils transitions from liquefaction to cyclic softening over a narrow range of plasticity index (PI). The uncertainty associated with characterizing the cyclic behavior of low plasticity silts has a significant impact on seismic vulnerability studies in the Pacific Northwest region of North America and other parts of the world. This study presents the results of laboratory cyclic shear tests on a low plasticity silt from a major infrastructure project in the Portland, Oregon, area. The soils in this study are defined as silty sands (SM) to sandy silts (ML) using USCS classification methods, with PI ranging between nonplastic (NP) and 5. The cyclic behavior of the soil is examined in the context of published relationships and data on similar soil types. The effects of pore water pressure during cyclic loading on post-cyclic reconsolidation strains and post-cyclic shear strength degradation are explored and compared to published studies on similar soils of the region. The results of this study contribute to the body of knowledge for cyclic behavior of low-plasticity silts and reduce uncertainty in design.
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REFERENCES
ASTM. (2000). Standard test methods for liquid limit, plastic limit, and plasticity index of soils. ASTM D4318. West Conshohocken, PA: ASTM.
ASTM. (2011). Standard Test Method for One-Dimensional Consolidation Properties of Soils. ASTM D2435-11. West Conshohocken, PA: ASTM.
ASTM. (2017a). Standard Test Method for Consolidated Undrained Direct Simple Shear Testing of Fine Grain Soils. ASTM D6528-17. West Conshohocken, PA: ASTM.
ASTM. (2017b). Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis. ASTM D6913-17. West Conshohocken, PA: ASTM.
ASTM. (2019). Standard Test Method for Consolidated Undrained Cyclic Direct Simple Shear Test under Constant Volume with Load Control or Displacement Control. ASTM D8296-19. West Conshohocken, PA: ASTM.
ASTM. (2021). Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis. ASTM D7928-21. West Conshohocken, PA: ASTM.
Bray, J. D., and R. B. Sancio. “Assessment of the liquefaction susceptibility of fine-grained soils.” Journal of geotechnical and geoenvironmental engineering 132.9 (2006): 1165–1177.
Boulanger, R. W., and I. M. Idriss. “Liquefaction susceptibility criteria for silts and clays.” Journal of geotechnical and geoenvironmental engineering 132.11 (2006): 1413–1426.
Casagrande, A. “The determination of pre-consolidation load and it’s practical significance.” Proc. Int. Conf. Soil Mech. Found. Eng. Cambridge, Mass., 1936. Vol. 3. 1936.
Dahl, K. R., et al. “Characterization of an alluvial silt and clay deposit for monotonic, cyclic, and post-cyclic behavior.” Canadian Geotechnical Journal 51.4 (2014): 432–440.
DeJong, J. T., et al. “Work-based framework for sample quality evaluation of low plasticity soils.” Journal of Geotechnical and Geoenvironmental Engineering 144.10 (2018): 04018074.
Jana, A., and A. W. Stuedlein. “Monotonic, Cyclic, and Postcyclic Responses of an Alluvial Plastic Silt Deposit.” Journal of Geotechnical and Geoenvironmental Engineering 147.3 (2021): 04020174.
Idriss, I. M., and R. W. Boulanger. (2006). “Semi-empirical procedures for evaluating liquefaction potential during earthquakes.” Soil dynamics and earthquake engineering, 26(2-4), 115–130.
Idriss, I. M., and R. W. Boulanger. (2008). Soil liquefaction during earthquakes. Earthquake Engineering Research Institute.
Ishihara, K., and M. Yoshimine. (1992). Evaluation of settlements in sand deposits following liquefaction during earthquakes. Soils and foundations, 32(1), 173–188.
Ladd, C. C., and R. Foott. “New design procedure for stability of soft clays.” Journal of the geotechnical engineering division 100.7 (1974): 763–786. (SHANSEP).
Lunne, T., T. Berre, and S. Strandvik. (1997). “Sample disturbance effects in soft low plastic Norwegian clay.” In Proc., Int. Symp. On Recent Developments in Soil and Pavement, 81–103. Leiden, Netherlands: A.A. Balkmema.
Sanin, M. V., and D. Wijewickreme. (2011). “Cyclic shear response of undisturbed and reconstituted Fraser River Silt.” In Proc., Pan-Am CGS Geotechnical Conf. Richmond, BC, Canada: Canadian Geotechnical Society.
Simpson, D. C., and T. M. Evans. (2016). “Behavioral thresholds in mixtures of sand and kaolinite clay.” Journal of Geotechnical and Geoenvironmental Engineering, 142(2), 04015073.
Terzaghi, K., R. Peck, and G. Mesri. (1996). Soil mechanics in engineering practice. New York: Wiley.
Vucetic, M., and R. Dobry. (1991). “Effect of soil plasticity on cyclic response.” J. Geotech. Eng. 117 (1): 89–107. https://doi.org/10.1061/(ASCE)0733-9410(1991)117:1(89).
Wang, L. B., and J. D. Frost. “Dissipated strain energy method for determining preconsolidation pressure.” Canadian geotechnical journal 41.4 (2004): 760–768.
Wijewickreme, D., A. Soysa, and P. Verma. (2019). “Response of natural fine-grained soils for seismic design practice: A collection of research findings from British Columbia, Canada.” Soil Dyn. Earthquake Eng. 124 (Sep): 280–296. https://doi.org/10.1016/j.soildyn.2018.04.053.
Youd, T. L., and D. M. Perkins. (1978). Mapping liquefaction-induced ground failure potential. Journal of the Geotechnical Engineering Division, 104(4), 433–446.
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Published online: Mar 23, 2023
ASCE Technical Topics:
- Continuum mechanics
- Cyclic strength
- Deformation (mechanics)
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Laboratory tests
- Material mechanics
- Material properties
- Materials engineering
- Plasticity
- Pressure (type)
- Silt
- Soil classification
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soils (by type)
- Solid mechanics
- Strength of materials
- Structural mechanics
- Tests (by type)
- Water pressure
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