Correlation between Resilient Modulus, Permanent Strain, and Damping Coefficients for Undisturbed Subgrade Soils
Publication: Geo-Congress 2024
ABSTRACT
To properly model the subgrade soil responses under dynamic loads, permanent deformation and damping characteristics must be studied in addition to the subgrade resilient modulus. Soils having relatively high resilient modulus may or may not have small permanent strains (εp) and low damping characteristics (ξ). Therefore, in addition to the resilient modulus (MR), permanent deformation and damping characteristics also need to be studied for undisturbed subgrade soils to replicate field conditions under cyclic loading properly. This study correlates permanent strain and damping information with resilient modulus testing for undisturbed subgrade soils. For this study, 76 Shelby tube samples of subgrade soils were collected from existing pavements in three different regions: SC-93 in Pickens County (Upstate Area), US-521 in Georgetown County (Coastal Plain), and US-321 in Orangeburg County (Coastal Plain, near the fall line). Statistical models were developed to correlate resilient modulus (k1, k2, k3), permanent strain (α1, α2, α3, α4), and damping model parameters (β1, β2, β3) with soil index properties for undisturbed soils. Models were also developed to correlate εp and ξ with subgrade soils MR.
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Information
Published In
Geo-Congress 2024
Pages: 216 - 228
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Continuum mechanics
- Damping
- Deformation (mechanics)
- Dynamics (solid mechanics)
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Infrastructure
- Material mechanics
- Material properties
- Materials engineering
- Pavements
- Resilient modulus
- Soil deformation
- Soil mechanics
- Soil modulus
- Soil properties
- Soil stress
- Soils (by type)
- Solid mechanics
- Structural dynamics
- Structural mechanics
- Subgrade soils
- Subgrades
- Transportation engineering
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