Eyyüb KARAKAN, Alper SEZER, Nazar TANRINİAN, Selim ALTUN

BEHAVIOR OF A DENSE NONPLASTIC SILT UNDER CYCLIC LOADING

Density of granular soils is increased after being subjected to seismic loading, leading to settlements in deeper layers. Foundation systems and shallow buried structures are affected from possible damage due to settlements induced by seismic action. Since studies on liquefaction behavior of silts is limited, it was considered to carry out an experimental study for evaluation of strength behavior of dense silts under cyclic loading conditions. All the tests were performed on specimens at a relative density of 80%, by application of constant level sinusoidal stresses under a frequency of 0.1 Hz. As a consequence, cyclic behavior of a dense silt is experimentally determined and evaluated by application of ten different cyclic stress ratio values.

Anahtar Kelimeler:

Nonplastic silt, cyclic triaxial tests, liquefaction

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Seed, H. B. Evaluation of soil liquefaction effects on level ground during earthquakes, Liquefaction Problems in Geotechnical Engineering, ASCE Annual Convention and Exposition, Philadelphia, PA, 1976; 1-109.
Seed, H.B., Idriss, I.M. Evaluation of liquefaction potential of sand deposits based on observations and performance in previous earthquakes, In Situ Testing to Evaluate Liquefaction Susceptibility, ASCE Annual Convention, St. Louis, October, 1981; Pre-print No. 81-544.
Ishihara, K., M. Yoshimine, Evaluation of settlements in sand deposits following liquefaction during earthquakes. Soils and Foundations, 1992; 32:1, 173–188.
Bray J. D., Sancio R. B., Durgunoglu H. T., Onalp A., Youd T. L., Stewart J. P., Seed R. B., Cetin K. O., Bol E., Baturay M. B., Christensen C., Karadayilar T. Subsurface characterization at ground failure sites in Adapazari, Turkey. ASCE Journal of Geotechnical and Geoenvironmental Engineering, 2004; 130:7, 673-685.
Cetin K. O., Der Kiureghian A., Seed R. B. Probabilistic models for the initiation of seismic soil liquefaction. Journal of Structural Safety, 2002; 24:1, 67-82.
Hasançebi, N., Ulusay, R., Cetin, K. Ö. Performance of the prediction methods to assess liquefaction-induced lateral spread displacements using a world-wide database. IAEG International Conference Engeopro-2011: Environmental Geosciences and Engineering Survey for Territory Protection and Population Safety, 2011, 6-8 September, Moscow, Russia.
Lee, K.L., Albaisa, A. Earthquake induced settlements in saturated sands. Journal of Geotechnical Engineering Division ASCE, 1974, 100:4, 387-406.
Tatsuoka, F., Sasaki, T., Yamada S., Settlement in saturated sand induced by cyclic undrained simple shear, Proc., 8th Word Conf. Earthq. Eng., San Francisco, CA, 95-102, 1984.
Nagase, H. and Ishihara, K. Liquefaction-induced compaction and settlement of sand during earthquakes. Soils and Foundations, 1988, 28:1, 66-76.
Wang, G., Wei, X., Liu, H. Liquefaction evaluation of dam foundation soils considering overlying structure. Journal of Rock Mechanics and Geotechnical Engineering, 2015, 7:2, 226-232.
Tokimatsu, K., Yamazaki, T., Yoshimi, Y. Soil Liquefaction Evaluations by Elastic Shear Moduli. Soils and Foundations, 1986, 26:1, 25-35.
Seed, H. B., Tokimatsu, K., Harder, L. F., Chung, R. M. The Influence of SPT Procedures in Soil Liquefaction. Journal of Geotechnical Engineering, 1984, 111:12, 1425-1445.
Tokimatsu, K. H.B. Seed, Evaluation of settlements in sands due to earthquake shaking. Journal of Geotechnical Engineering, 1987, 113:8, 861-878.
ASTM D4253-16, Standard test methods for maximum index density and unit weight of soils using a vibratory table, ASTM International, West Conshohocken, PA, 2016, www.astm.org.
ASTM D4254-16, Standard test methods for minimum index density and unit weight of soils and calculation of relative density, ASTM International, West Conshohocken, PA, 2016, www.astm.org.
JGS 0520-2000 , Preparation of Soil Specimens for Triaxial Tests.
JGS 0541-2000, Method for Cyclic Undrained Triaxial Test on Soils.
JGS 0542-2000 (Method for Cyclic Triaxial Test to Determine Deformation Properties of Geomaterials)
Ishihara K., Troncoso, Yasuhiro K., and Yoshiki, T., Cyclic Strength Characteristics of Tailings Materials, Soils and Foundations, 1980, 20-4, 127-142.