Application of Damage Mechanics to Deep Tunnels

  • G. Swoboda
  • M. Zaki
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 397)


The paper utilizes an anisotropic nonlinear damage model in strain space to describe the behavior of jointed rock and applies it to mechanical analysis of tunneling. This work focuses on rate-independent and small-deformation behavior during static isothermal processes. The prime results include: (1) the properties of damage-dependent elasticity tensors based on geological information of the jointed rock mass; (2) the damage evolution law presented on the basis of thermodynamics and combined with the endochronic theory; (3) the symmetric form of the effective stress concept which held between the elasticity tensor of the damaged material and that of the fictitious undamaged material; and (4) the global damage tensor based on the work-equivalence principle and the local geological data of multi-joint sets. Finally the numerical results of a tunnel intersection in jointed rock is presented to illustrate the mechanical behavior of this model.


Rock Mass Damage Evolution Jointed Rock Elasticity Tensor Jointed Rock Mass 
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Copyright information

© Springer-Verlag Wien 1998

Authors and Affiliations

  • G. Swoboda
    • 1
  • M. Zaki
    • 2
  1. 1.University of InnsbruckInnsbruckAustria
  2. 2.Minia UniversityMiniaEgypt

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