Numerical Investigation of Strain Rate Effect for CRS Consolidation of Normally Consolidated Soil
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 b governs CRS consolidation behavior and that CRS tests generally should be conducted with b0.1. Finally, correction factors are proposed for calculated values of coefficient of consolidation from CRS tests on normally consolidated soils.
Recommended Citation
H. Pu and P. J. Fox, "Numerical Investigation of Strain Rate Effect for CRS Consolidation of Normally Consolidated Soil," Geotechnical Testing Journal, vol. 39, no. 1, pp. 80 - 90, ASTM International, Jan 2016.
The definitive version is available at https://doi.org/10.1520/GTJ20150002
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Clay; Consolidation; Constant rate of strain; Large strain; Numerical modeling; Strain rate effect
International Standard Serial Number (ISSN)
0149-6115
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 ASTM International, All rights reserved.
Publication Date
01 Jan 2016
Comments
National Science Foundation, Grant 1363230