Abstract:Based on the study of triaxial creep curves of greenschist specimens,the initial attenuation creep phase,the stabilization creep phase and the speedup creep phase of creep curve of greenschist specimen are analyzed. It is shown that the damage rapidly increases in the speedup creep phase. For the generalized Bingham creep model,a nonlinear function is introduced into the attenuation creep phase and the stabilization creep phase,and damage is introduced into the speedup creep phase;then,the creep damage constitutive equation of greenschist is created. The data obtained from rheological test on greenschist specimen on rock servo-controlling creep equipment are used to carry out the identification of the new creep damage model;and it can get the correlative parameters of the new creep damage model. Comparison between the results obtained from the creep damage model and the experiment shows that this model can well describe the initial attenuation creep phase,the stabilization creep phase and the speedup creep phase of the creep curve,which shows that the model is right and reasonable.