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2012 2

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constitutive model 1

creep 1

disturbed state concept 1

granular material 1

hypoplasticity 1

plasticity 1

rockfill 1

rockfills 1

solid hardness 1

stress level 1

wetting deformation 1

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Development of a constitutive model for rockfills and similar granular materials based on the disturbed

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4, Pages 365-378 doi: 10.1007/s11709-012-0178-2

Abstract: Behavior of rockfills was investigated experimentally and theoretically.

Keywords： constitutive model granular material rockfill plasticity disturbed state concept stress level

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Influence of pressure and density on the rheological properties of rockfills

Erich BAUER, Zhongzhi FU, Sihong LIU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1, Pages 25-34 doi: 10.1007/s11709-012-0143-0

Abstract: Long-term deformations of rockfill dams can be related to the type of dam, the pre-compaction achieved during the construction of the dam, the history of loading events, the rheological properties of the rockfill material used, the seepage behavior caused by defects of the sealing, the interactions of the dam building with the foundation, and the hydrothermal phenomena of the stressed rockfill material. The present paper investigates the rheological properties of coarse grained rockfill materials using a hypoplastic constitutive model. Particular attention is paid to wetting deformation under different deviatoric loading states and pre-compactions. To quantify the state of weathering a so-called “solid hardness” is used in the sense of a continuum description. It is shown that an appropriate modeling of wetting deformations requires a unified description of the interaction at least between the state of weathering, the stress state, the density and the rate of deformation. The results obtained from the numerical simulations are compared with available experimental data for a rockfill material used in Xiaolangdi earth dam.

Keywords： rockfills solid hardness wetting deformation hypoplasticity creep