Experimental Study on Strain Penetration Effects in Fixed-End Rotation of RC Beam-Column Connections with High-Strength Reinforcement

Table 3

Materials properties of concrete.

Grade	C40	C50	C60
Cubic strength, fcu (MPa)	50.6	59.2	74.3
Compressive strength, fc′ (MPa)	40.5	47.4	61.9
Tensile strength, fct (MPa)	3.41	3.73	4.22

For concrete below C50 grade, the compressive strength f_c′ was calculated as 0.8 times the cubic strength f_cu; the compressive strength f_c′ of C60 concrete was calculated as 0.833 times the cubic strength f_cu; the tensile strength f_ct was calculated by f_ct = 0.395 [20].