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Stress and Deformation of CFRD Based on Gudehus-Bauer Subplastic Constitutive Model
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[1]CHEN Zeqin,LIU Guoming.Stress and Deformation of CFRD Based on Gudehus-Bauer Subplastic Constitutive Model[J].Journal of Zhengzhou University (Engineering Science),2020,41(06):53-59.[doi:10.13705/j.issn.1671-6833.2020.06.013]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 41卷 Number of periods: 2020 06 Page number: 53-59 Column: Public date: 2020-12-31
Title:
Stress and Deformation of CFRD Based on Gudehus-Bauer Subplastic Constitutive Model
Author(s):
CHEN Zeqin1;  LIU Guoming2
1.State Grid FuJian Electric Power Research Institute, Fuzhou 350007，China; 2.College of Civil Engineering，Fuzhou University，Fuzhou 350108，China
Keywords:
concrete-faced rockfill dam;  rockfill;  modified Gudehus-Bauer hypoplastic model;  finite element method
CLC:
-
DOI:
10.13705/j.issn.1671-6833.2020.06.013
Abstract:
The Gudehus-Bauer hypoplastic constitutive model and its parameters were introduced briefly. Based on the Gudehus-Bauer hypoplastic constitutive model, the relationships between the parameters α, β and the confining pressure were established. The triaxial compression test curves of rockfill materials were simulated with the Gudehus-Bauer hypoplastic constitutive model and compared with the test values. According to the simulation results, a volumetric strain control term was added to the model, which improved the triaxial compression test volumetric strain curve of rockfill material simulated by he Gudehus-Bauer hypoplastic constitutive model. The stress-deformation analysis of CFRD was performed by the modified Gudehus-Bauer hypoplastic constitutive model with 3D Nonlinear finite element, and the results were compared with the double-yield surface model and Duncan E-B model. The numerical results indicated that the settlement, the horizontal displacement distribution and the principal stress distribution calculated by the modified Gudehus-Bauer hypoplastic constitutive model were close to the Shen Zhujiang’s double-yield surface model. Meanwhile, it could overcome the problem of higher tensile stresses at the bottom of face slabs calculated by the Duncan E-B mode in storage period.
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