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A study on stationary and nonstationary viscoelastic models of greenschist

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Abstract

Uniaxial compression creep tests have been performed on greenschist collected from the auxiliary tunnel at the Jinping II Hydropower Station in China. A few stationary and nonstationary viscoelastic models are used to fit the strain-time curves of the greenschist. There is a great difference between the model and test curves using the Hooke-Kelvin model or the Burgers model. Though some nonstationary viscoelastic models fit the test curves well, some parameters of these models have no physical meaning. The fitting accuracies of some expanded Hooke-Kelvin and expanded Burgers models in terms of the test curves are close to that of the six-component viscoelastic model (one Maxwell element in series with two Kelvin elements). The six-component viscoelastic model has fewer parameters, and each parameter has an exact physical meaning. Therefore, the six-component viscoelastic model is more suitable, in contrast to some nonstationary viscoelastic models, expanded Hooke-Kelvin models, and expanded Burgers models, for analyzing viscoelastic behaviors of rock of this type.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 41002108, 41230635), the Open Research Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Grant No. SKLGP2011K008), the Natural Science Foundation of Zhejiang Province (Grant No. LY13E080021), and the Ningbo Municipal Natural Science Foundation (Grant No. 2011A610072).

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Authors and Affiliations

  1. Faculty of Architectural, Civil Engineering and Environment, Ningbo University, 315211, Ningbo, Zhejiang, People’s Republic of China

    L. X. Xiong

  2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, 610059, Chengdu, Sichuan, People’s Republic of China

    T. B. Li

  3. Department of Geotechnical Engineering, Tongji University, 200092, Shanghai, People’s Republic of China

    L. D. Yang

  4. College of Environment and Civil Engineering, Chengdu University of Technology, 610059, Chengdu, Sichuan Province, People’s Republic of China

    X. W. Yuan

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  1. L. X. Xiong
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  2. T. B. Li
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Correspondence to L. X. Xiong.

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Xiong, L.X., Li, T.B., Yang, L.D. et al. A study on stationary and nonstationary viscoelastic models of greenschist. Arab J Geosci 8, 2477–2486 (2015). https://doi.org/10.1007/s12517-014-1390-2

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  • DOI: https://doi.org/10.1007/s12517-014-1390-2

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