Journal
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume 54, Issue 11, Pages 2015-2024Publisher
SCIENCE PRESS
DOI: 10.1007/s11433-011-4518-3
Keywords
hardfill; stress-strain relationship; large-scale triaxial tests; constitutive model
Categories
Funding
- National Natural Science Foundation of China [10932012]
- China-Europe Science and Technology Cooperation Program [0820]
- European Commission [FP7-NMP-2007-LARGE-1]
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Hardfill is a new type of artificially cemented material for dam construction works, with a wide application prospect. Its mechanical behavior lies between concrete and rockfill materials. A series of large-scale triaxial tests are performed on hardfill specimens at different ages, and the stress-strain behavior of hardfill is further discussed. The strength and stress-strain relationship of hardfill materials show both frictional mechanism and cohesive mechanism. An age-related constitutive model of hardfill is developed, which is a parallel model consisting of two components, rockfill component and cementation component. Moreover, a comparison is made between the simulated and the experimental results, which shows that the parallel model can reflect the mechanical characteristics of both rockfill-like nonlinearity and concrete-like age relativity. In addition, a simplified method for the determination of parameters is proposed.
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