Brittle Damage and Coalescence Model of Jointed Rock Mass

Heterogeneous materials such as polycrystalline rock mass and concrete contain a large number of pores and microcracks. These microdefects are responsible for the inelastic mechanical behavior and they finally lead to macroscopic failure under compression and shear. They also influence seepage traje...

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Bibliographic Details
Published in:Key engineering materials 2004-01, Vol.261-263, p.201-206
Main Authors: Qiu, X.B., Chen, Wei Zhong, Li, S.C., Wang, Chong Ge, Yang, Chien Hsin
Format: Article
Language:English
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Summary:Heterogeneous materials such as polycrystalline rock mass and concrete contain a large number of pores and microcracks. These microdefects are responsible for the inelastic mechanical behavior and they finally lead to macroscopic failure under compression and shear. They also influence seepage trajectory and fialure modes of rock mass. Based on equivalent energy theory, the anisotropy damage constitutive model of jointed rock mass is set up with joint surface closing and friction considered. The flexibility tensor and its increments are deduced. The FEM with the new constitutive model has been applied to analyze the stability of a planed two-lane subsea road tunnel between the mainland and island in Xiamen city, China. Damage evolution zone of fractures, plastic zone and deformation of rock mass due to excavation are obtained from numerical results.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.261-263.201