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Volume 38 Issue 4
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WEI Kuang-min, CHEN Sheng-shui, LI Guo-ying, FU Zhong-zhi. Constitutive model for coarse-grained dam materials considering state parameter[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(4): 654-661. DOI: 10.11779/CJGE201604009
Citation: WEI Kuang-min, CHEN Sheng-shui, LI Guo-ying, FU Zhong-zhi. Constitutive model for coarse-grained dam materials considering state parameter[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(4): 654-661. DOI: 10.11779/CJGE201604009
shu

Constitutive model for coarse-grained dam materials considering state parameter

  • 1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
    2. Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dam of the Ministry of Water Resources, Nanjing 210029, China

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  • Revised Date: March 21, 2015
  • Published Date: April 24, 2016
    Graphical Abstract
    • Abstract
  • The stress-strain relationship of coarse-grained soils is closely related to soil density. The regular constitutive model cannot consider the effect of initial void ratio on mechanical behaviors of coarse-grained soils. In this paper, a two-yield-surface model is proposed for coarse-grained soils based on triaxial tests. The two-yield-surface model using a state parameter so that can reflect the influence of soil density on the peak stress ratio, dilatancy rule, strain hardening or softening rule in shearing of coarse-grained soils. The stress-strain expressions of this model were also deduced. Several kind of coarse-grained soils test results were used to verify the adaptability of the proposed model, results showed that the model predictions are consistent with test results.
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