Journal Published Online: 29 July 2015
Volume 39, Issue 1

Numerical Investigation of Strain Rate Effect for CRS Consolidation of Normally Consolidated Soil

CODEN: GTJODJ

Abstract

Constant rate of strain (CRS) consolidation tests are commonly used to measure consolidation properties of fine-grained soils. A series of numerical simulations was conducted using the CCRS1 model to investigate the effect of applied strain rate on accuracy of data analysis methods given by ASTM D4186/D4186M-12e1. The simulations consider six normally consolidated soils, each with rate-independent constitutive relationships, constant coefficient of consolidation, and constant coefficient of compressibility or compression index. Results indicate that high values of applied strain rate can introduce significant error for calculated consolidation properties (compressibility, hydraulic conductivity, coefficient of consolidation) using both linear and nonlinear analysis methods. Results also indicate that the normalized strain rate β governs CRS consolidation behavior and that CRS tests generally should be conducted with β ≤ 0.1. Finally, correction factors are proposed for calculated values of coefficient of consolidation from CRS tests on normally consolidated soils.

Author Information

Pu, Hefu
Department of Civil, Architectural and Environmental Engineering., Missouri Univ. of Science and Technology, Rolla, MO, US
Fox, Patrick
Department of Structural Engineering, Univ. of California-San Diego, La Jolla, CA, US
Pages: 11
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: GTJ20150002
ISSN: 0149-6115
DOI: 10.1520/GTJ20150002