Nonlinear Creep Behavior and Viscoelastic-Plastic Constitutive Model of Rock-Concrete Composite Mass

Table 3

The specific creep test plan under different confining pressure.

Confining pressure, σ3 (MPa)	Peak axial deviatoric stress of TCT, σ-pads	The axial deviatoric stress for each step
		Step 1 10%	Step 2 20%	Step 3 30%	Step 4 40%	Step 5 50%	Step 6 60%	Step 7 70%
0	30.56	3.06	6.11	9.17	12.22	15.28	18.33
7	65.98	13.20	19.79	26.39	32.99	39.59
15	94.07	9.41	18.81	28.22	37.63
22	115.54	11.55	23.10	34.65

According to the final test results, only the tested steps are listed, and the untested steps are not listed. indicates the creep failure stress under different confining pressures.