›› 2010, Vol. 31 ›› Issue (3): 981-985.

• Numerical Analysis • Previous Articles     Next Articles

Finite element analysis of underground caverns in layered rock mass based on Cosserat theory

YANG Le 1, 2，XU Nian-chun3，XIE Gui-hua1，WU De-lun1   

  1. 1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Key Laboratory of Mineral Geology & Environmental Geology, Chongqing Administration of Land, Resources and Housing, Chongqing 400042, China; 3. College of Civil Engineering, Chongqing University of Science & Technology ,Chongqing 400020, China
  • Received:2008-02-19 Online:2010-03-10 Published:2010-03-31

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Abstract:

When bilaminated rock mass is numerical analyzed by conventional finite element method ,that the shortcomings produced is not only the huge modeling workload and maneuverability become more inefficient with layer numbers increasing; but also the method can’t reflect the bending deformation of the layered material. The Cosserat medium expanded model is a equivalent methods aiming at the complex rock mass. The basic principle of the Cosserat continuum theory and its expanded constitutive model are introduced firstly; and the Mohr-Coulomb plastic yield criterion of the new model is given. Then the FEM program is written by using Matlab system; and it is applied to the underground caverns. The results of comparison between Cosserat model and conventional continuum model are presented; and it is shown that the program based on Matlab and Cosserat model is effective, applicable and superior.

Key words: layered rock mass, Cosserat theory, expanded model, underground cavern, Matlab, finite elements

CLC Number: 

  • O 241.82
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