Materials, coefficients, notation
The following notation for material parameters is used:
characteristic cube compressive strength of concrete
design compressive strength of concrete
characteristic tensile strength of concrete
design tensile strength of concrete
characteristic strength of steel bar
design tensile strength of steel bar
The characteristic compressive strength of concrete is the basic input parameter given by the class of concrete - it serves to derive the remaining coefficients of reliability.
The most common notation for geometrical parameters:
effective depth of cross-section
lever arm (arm of internal forces)
All computations are carried out according to the theory of limit states.