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Strain Rate Effects on Pressuremeter Testing

by A. Skandarajah, Purdue Univ, West Lafayette, United States,
D. Penumadu, Purdue Univ, West Lafayette, United States,
J. L. Chameau, Purdue Univ, West Lafayette, United States,



Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond

Abstract:

This paper discusses the effect of strain rate on the cavity expansion problem and pressuremeter test. A cuboidal shear device, CSD, was used to perform pressuremeter strain path tests with strain rates varying from 0.01% to 5.0% per minute. The laboratory experiments showed that the undrained shear strength and initial tangent modulus values increase with strain rate. The undrained strength in the pressurementer test increased about 14% to 15% for each tenfold increase in strain rate whereas conventional triaxial tests indicated an increase of 10% per logarithmic cycle of strain rate.

Subject Headings: Strain rates | Strain | Shear strength | Triaxial tests | Shear tests | Measuring instruments | Soil tests

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