The Research on the Viscoelasticity of Geogrid and Constitutive Model of Reinforced Soil

Author:

Zhou Zhi Gang1,Li Yu Zhou1

Affiliation:

1. Changsha University of Science and Technology

Abstract

Based on the creep testing results of geogrids, a three-parameters viscoelastic constitutive model of the geogrids is established, and their applicabilities and reliabilities are evaluated by using the utmost optimization theory. It is illustrated that the three-parameters viscoelastic model of geogrids established can relatively accurately reflect the two-stage attenuation creep properties of geogrids at a low stress. Then, a constitutive model of reinforced soil considering viscoelasticity of geogrids is established, and the constitutive model parameters of reinforced soil are solved based on the utmost optimization theory. Finally, the variation regularities of stress-strain characteristics of reinforced soil with the changes of different influencing factors is studied.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference16 articles.

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2. The Professional Standards Compilation Group of People¢s Republic of China. JTJ/T 019—98 Applied technical code for geosynthetics of highway. Beijing: China Communications Press, 1998: 35–39.

3. Maotian Luan, Chengzhi Xiao, Qing Yang, et al. Experimental study on creep properties and viscoelasticity constitutive model for geogrids. Rock and Soil Mechanics, 2005, 26(2): 187–190. (in Chinese).

4. Maotian Luan, Chengzhi Xiao, Qing Yang, et al. Experiment on empirical creep model and its parameters of geogrids. China Journal of Highway and Transport, 2006, 19(6): 19–24. (in Chinese).

5. Maotian Luan, Chengzhi Xiao, Qing Yang et al. A calculation method of stress of composite media composed of reinforcements and soils considering creep effect of geogrids. Journal of Dalian University of Technology, 2006, 46(1): 80–86. (in Chinese).

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