Geo-Congress 2020
Evaluation of Deformation Behavior of Sand-Clay Mixture under Traffic Loads
Publication: Geo-Congress 2020: Modeling, Geomaterials, and Site Characterization (GSP 317)
ABSTRACT
Vehicle traffic loading induces a heart-shaped stress path in deviatoric stress space [τzθ to (σz-σθ)/2], causing the rotation of principal stress direction acting on a soil element. A conventional triaxial test is not capable of applying the principal stress rotation induced by heart-shaped stress path and therefore, is not able to evaluate the behavior of soils accurately under traffic loads. However, a hollow cylinder test can simulate heart-shaped stress path imposed by traffic loading. In this study, the effect of heart-shaped stress path on the vertical deformation behavior of sand-clay mixture including 20% of clay by mass was experimentally investigated through hollow cylinder test. The tests in this study were conducted at three stages: i) saturation, ii) consolidation, and iii) shearing. The specimens were first saturated until Skempton’s B≥0.95 and then consolidated with K0=0.5. Thereafter, the specimens were sheared under cyclic loadings involving vertical stress and shear stress. Experimental results indicate that the principal stress rotation induced by traffic loading significantly influences the permanent strain development in sand-clay mixture.
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ACKNOWLEDGEMENT
The first author would like to thank the Scientific and Technological Research Council of Turkey (TUBITAK) for the financial support of his postdoctoral research at the Department of Civil, Construction and Environmental Engineering, Iowa State University.
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Information & Authors
Information
Published In
Geo-Congress 2020: Modeling, Geomaterials, and Site Characterization (GSP 317)
Pages: 201 - 209
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8280-3
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
ASCE Technical Topics:
- Clays
- Continuum mechanics
- Deformation (mechanics)
- Design (by type)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Infrastructure
- Load factors
- Materials characterization
- Materials engineering
- Mixtures
- Sandy soils
- Soil deformation
- Soil mechanics
- Soil properties
- Soils (by type)
- Solid mechanics
- Structural design
- Structural dynamics
- Structural mechanics
- Traffic engineering
- Traffic management
- Transportation engineering
- Vehicle loads
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