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Correlation between Cyclic Resistance and Shear-Wave Velocity for Providence Silts |
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| Authors: | Christopher D P Baxter Aaron S Bradshaw Russell A Green Jian-Hua Wang |
| Affiliation: | 1Associate Professor, Depts. of Ocean/Civil and Environmental Engineering, Univ. of Rhode Island, Narragansett, RI 02882. E-mail: baxter@oce.uri.edu 2Assistant Professor, Dept. of Civil Engineering, Merrimack College, North Andover, MA 01845. E-mail: aaron.bradshaw@merrimack.edu 3Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, Ann Arbor, MI 48109. E-mail: rugreen@engin.umich.edu 4Professor, Geotechnical Engineering Institute, Tianjin Univ., Tianjin, P. R. China 300072. E-mail: tdwjh@eyou.com |
| Abstract: | As an alternative to a field-based liquefaction resistance approach, cyclic triaxial tests with bender elements were used to develop a new correlation between cyclic resistance ratio (CRR) and overburden stress-corrected shear-wave velocity (VS1) for two nonplastic silts obtained from Providence, Rhode Island. Samples of natural nonplastic silt were recovered by block sampling and from geotechnical borings/split-spoon sampling. The data show that the correlation is independent of the soils’ stress history as well as the method used to prepare the silt for cyclic testing. The laboratory results indicate that using the existing field-based CRR-VS1 correlations will significantly overestimate the cyclic resistance of the Providence silts. The strong dependency of the CRR-VS1 curves on soil type also suggests the necessity of developing silt-specific liquefaction resistance curves from laboratory cyclic tests performed on reconstituted samples. |
| Keywords: | Silts Liquefaction Cyclic tests Shear waves Velocity |