Materials, Coefficients, Notation
The following notation for material parameters is used:
f 'c | - | specified compressive strength of concrete |
Ec | - | modulus of elasticity of concrete at 28 days |
f y | - | lower characteristic 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 |
h | - | 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.