Constitutive modeling of dense gravelly soils subjected to cyclic loading

Authors

  • Huabei Liu,

    Corresponding author
    1. School of Civil Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China
    2. Department of Civil Engineering, City College of New York, New York, NY, U.S.A.
    • Correspondence to: Huabei Liu, School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

      E-mail: hbliu@hust.edu.cn

    Search for more papers by this author
  • Degao Zou,

    1. Dalian University of Technology, Institute of Earthquake Engineering, School of Hydraulic Engineering, Dalian, China
    2. State Key Laboratory of Coastal and Offshore, Dalian University of Technology, Dalian, China
    Search for more papers by this author
  • Jingmao Liu

    1. Dalian University of Technology, Institute of Earthquake Engineering, School of Hydraulic Engineering, Dalian, China
    2. State Key Laboratory of Coastal and Offshore, Dalian University of Technology, Dalian, China
    Search for more papers by this author

SUMMARY

A constitutive model for dense gravelly soils was developed to reproduce their responses under cyclic loadings. Its application aims at nonlinear dynamic analyses of earth structures involving gravelly soils, such as rockfill dams and railroad ballasts. The framework of generalized plasticity was modified to incorporate the concept of stress distance for better simulation of unloading and reloading responses. It was then combined with the theory of critical state soil mechanics to develop the constitutive model. The model has the following important features: unified simulation of particle breakage through translating critical state line, smooth transition from unloading to reloading in the stress space, and proper modeling of cyclic hysteresis, cyclic densification, and cyclic hardening of dense gravelly soils. Most of the model parameters can be obtained through simple calculation using conventional triaxial test results, and their calibration process was discussed. The model was used to simulate the cyclic responses of three gravelly soils with satisfactory accuracy. Copyright © 2014 John Wiley & Sons, Ltd.

Ancillary