Study of Shear Constitutive Model for Schistose Rock Mass

Shang Ge Liu; Hua Xu; Jian Liu; Xiao Tao

doi:10.4028/www.scientific.net/AMR.838-841.800

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 838-841Study of Shear Constitutive Model for Schistose...

Study of Shear Constitutive Model for Schistose Rock Mass

Abstract:

Based on the direct shear tests of schist and shale at dry and water-saturated states, combed with the advantages and disadvantages of models for rock mass and structure surface, we proposed shear stress-displacement constitutive model of schistose rock mass. The model is in the form of piecewise exponential function and its advantages are as follows: Piecewise function can reasonably describe the nonlinear pre-peak shear hardening and post-peak shear softening characteristics; Regard peak strength, peak displacement and residual strength as critical points, so it can accurately describe the strength characteristics of the material; The fitting degree is high with direct shear tests both at dry and water-saturated states; Only one parameter value is needed to obtain by fitting experimental curves while others are convenient to determine. All of those are benefit to applications in engineering practice.

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Periodical:

Advanced Materials Research (Volumes 838-841)

Pages:

800-804

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.838-841.800

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Online since:

November 2013

Authors:

Shang Ge Liu*, Hua Xu, Jian Liu, Xiao Tao

Keywords:

Constitutive Model, Exponential Function, Schistose Structure, Shear Test

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