Chapter
Apr 26, 2012
Confining Stress Effects on the Stress-Strain Response of EPS Geofoam in Cyclic Triaxial Tests
Authors: A. C. Trandafir, Ph.D. [email protected], [email protected], B. A. Erickson, J. F. Moyles, and S. F. Bartlett, Ph.D. [email protected]Author Affiliations
Publication: Geo-Frontiers 2011: Advances in Geotechnical Engineering
Abstract
This paper summarizes the results of a laboratory study addressing the cyclic stress-strain response of expanded polystyrene (EPS) geofoam under various confining stresses. Experimental results from cyclic uniaxial and triaxial compression tests conducted in the viscoelastic domain revealed that the normalized shear modulus degradation curve is insensitive to the static confining stress, whereas the damping ratio of EPS geofoam appears to increase with increasing static confining stress. The visco-elasto-plastic response of EPS geofoam also seems to be affected by the magnitude of the applied static confining stress in cyclic triaxial tests. An increase in the static confining stress is associated with a reduction in the accumulated permanent (plastic) strain for a specific number of applied loading cycles.
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© 2011 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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ASCE Technical Topics:
- Business management
- Cyclic tests
- Employment
- Engineering fundamentals
- Geomaterials
- Geomechanics
- Geotechnical engineering
- Job satisfaction
- Laboratory tests
- Personnel management
- Practice and Profession
- Soil dynamics
- Soil mechanics
- Stress (by type)
- Stress analysis
- Stress strain relations
- Structural analysis
- Structural engineering
- Tests (by type)
- Triaxial loads
- Triaxial tests
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M.ASCE
Department of Geology and Geophysics, Geological Engineering Program, University of Utah, 115 South 1460 East Rm. 383, Salt Lake City, Utah 84112-0101, USA.E-mail: [email protected], [email protected]
B. A. Erickson
Department of Geology and Geophysics, Geological Engineering Program, University of Utah, 115 South 1460 East Rm. 383, Salt Lake City, Utah 84112-0101, USA
J. F. Moyles
Department of Geology and Geophysics, Geological Engineering Program, University of Utah, 115 South 1460 East Rm. 383, Salt Lake City, Utah 84112-0101, USA
Department of Civil and Environmental Engineering, University of Utah, 122 South Central Campus Dr., Salt Lake City, Utah 84112, USA.E-mail: [email protected]
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