Materials, coefficients, notation
The following notation for material parameters is used:
f 'c | - | characteristic compressive cylinder strength of concrete at 28 days |
Ec | - | mean value of the modulus of elasticity of concrete at 28 days |
f 'ct,f | - | characteristic flexural tensile strength of concrete |
f 'ct | - | characteristic principal tensile strength of concrete |
fsy | - | yield strength of reinforcing steel |
The characteristic compressive strength of concrete is the basic input parameter given by the class of concrete.
The most common notation for geometrical parameters:
b | - | cross-section width |
D | - | cross-section depth |
d | - | effective depth of cross-section |
z | - | lever arm (arm of internal forces) |
All computations are carried out according to the theory of limit states.