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Volume 36 Issue 1
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LI Jian, ZHAO Cheng-gang. Constitutive model for unsaturated expansive soils under suction cycles[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 132-139. DOI: 10.11779/CJGE201401012
Citation: LI Jian, ZHAO Cheng-gang. Constitutive model for unsaturated expansive soils under suction cycles[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 132-139. DOI: 10.11779/CJGE201401012
shu

Constitutive model for unsaturated expansive soils under suction cycles

  • 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China

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  • Received Date: June 27, 2013
  • Published Date: January 20, 2014
    Graphical Abstract
    • Abstract
  • At the particle scale, the theory of thermomechanics is employed to describe the mechanism of mechanical behaviors during suction cycle paths. By means of the analysis, the plastic deformation can be decomposed into two parts, which are attributed to the structural rearrangement and change of stored plastic work, respectively. Moreover, a new constitutive model for unsaturated expansive soils is proposed, which adopts the suction-change yield surface and combines the isotropic-kinematic hardening rule to consider the mechanism of plastic deformation. The predictions are made based on the test results of suction cycles published in public. The comparisons between the measured and predicted results indicate that the proposed model can quantitatively predict the behaviors of unsaturated expansive soils under suction cycles.
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    • References (32)
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