Research of Rock Mass Unloading Constitutive Model and its Engineering Application
Based on the results of triaxial unloading tests，the stress-strain characteristics and failure characteristics of rock mass have been discussed. Considering unloading degree as an important parameter，an elastic-brittle-plastic mechanical model has been established according to the unloading stress condition，which considers that unloading yield function varies linearly between Griffith with Hoek-Brown criterion after rock mass receives plastic deformation caused by unloading. Taking jinshajiang excavation slope of a hydropower station as engineering background, the three-dimensional continua fast Lagrangian analysis software FLAC3D is employed in the slope stability analysis under the excavation, and the distribution characteristics of the slop deformation is studied.
Dongye Sun, Wen-Pei Sung and Ran Chen
R. H. Wang et al., "Research of Rock Mass Unloading Constitutive Model and its Engineering Application", Applied Mechanics and Materials, Vols. 71-78, pp. 1846-1849, 2011