Variation Pattern of the Stress-Strain Curve of Concrete under Multifactor Coupling

Table 3

Every parameter value in the stress-strain curve of concrete (test curve).

Concrete strength grade	Environment	(×10^4 MPa)	(×10^4 MPa)	(MPa)
C60	Internal environment	3.59	3.09	57.78	0.00187
C60	External environment	3.44	3.24	56.63	0.00175
C80	Internal environment	3.92	3.03	71.89	0.00237
C80	External environment	4.33	3.34	71.06	0.00213
C100	Internal environment	4.74	3.75	88.84	0.00237
C100	External environment	4.16	3.58	84.86	0.00237