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Volume 29 Issue 5
Oct.  2016
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Article Contents
Journal of Southwest Jiaotong University  > 2016  >  29(5): 1033-1040.
CUI Kai, LIN Weikang. Experimental Study on Dynamic Shear Modulus and Damping Ratio for Unsaturated Mixed Soil[J]. Journal of Southwest Jiaotong University, 2016, 29(5): 1033-1040. doi: 10.3969/j.issn.0258-2724.2016.05.028
Citation: CUI Kai, LIN Weikang. Experimental Study on Dynamic Shear Modulus and Damping Ratio for Unsaturated Mixed Soil[J]. Journal of Southwest Jiaotong University, 2016, 29(5): 1033-1040. doi: 10.3969/j.issn.0258-2724.2016.05.028
shu

Experimental Study on Dynamic Shear Modulus and Damping Ratio for Unsaturated Mixed Soil

doi: 10.3969/j.issn.0258-2724.2016.05.028
  • Received Date: 10 Aug 2016
  • Publish Date: 25 Oct 2016
    Abstract
  • Talus mixed soil, widely distributed throughout the Western Sichuan mountainous area, is often unsaturated in nature. Dynamic shear modulus and damping ratio are essential parameters of the dynamic properties in the analysis of seismic response. In order to study the influential factors on these two parameters, dynamic triaxial apparatus was used to obtain the dynamic backbone curve and hysteresis curve of mixed soil under cyclic loading with small strain, as well as fitted Gd/Gmax- and - curves. The functions of two curves varying with the water content and the fine particle content were analyzed. The research results show that the saturation and fine particle content have significant effects on the dynamic shear modulus and damping ratio, and mineral constituents also play a role in the changes of these two parameters. Based on the comparative analysis, the recommended values of dynamic shear modulus ratio and damping ratio suitable were provided for talus mixed soil in saturation and non-saturation states.

     

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